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I need a mixed-signal circuit tailored for a communication system. The design must seamlessly combine signal modulation with accurate data conversion, forming the heart of a reliable RF-to-digital signal chain. Scope • Develop the complete schematic, integrating the chosen modulation block with high-resolution ADC/DAC stages. • Validate performance through simulation (SPICE, ADS, or an equivalent flow) and document key figures—SNR, BER, ENOB, and phase noise where applicable. • Lay out the PCB (Altium Designer, KiCad, or similar), observing best-practice mixed-signal partitioning, grounding, and impedance control. • Supply a clearly annotated BOM with part numbers that are in current production. Acceptance Criteria 1. Modulation stage meets the specified carrier frequency and complies with standard linearity metrics. 2. Data-conversion block achieves the target resolution and sample rate without exceeding the defined power budget. 3. Simulation plots and test benches reproduce the above results. 4. Deliverables handed over: schematics (PDF + editable file), PCB files, BOM, and a concise design report. With these elements in place, I’ll be able to move directly from design approval to prototype fabrication.
ID do Projeto: 40140485
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19 freelancers estão ofertando em média $140 USD for esse trabalho

With over 10 years of experience in electronics engineering, I am confident that I am the perfect fit for your mixed-signal communication circuit design project. My proficiency in PCB design and development—particularly with Altium designer and KiCad—ensures that I can create a reliable and highly efficient design that observes best practices in mixed-signal partitioning, grounding, and impedance control. My expertise extends to high-resolution ADC/DAC stages, which you need for your RF-to-digital signal chain. As you specified, I maintain strict compliance with power budgets without compromising target resolution and sample rates. This skill is essential during the simulation exercise where I will provide plots and test benches that accurately reproduce defined performance metrics such as SNR, BER, ENOB, and phase noise. I can assure you that my design will meet specified carrier frequency and linearity metrics effectively setting you up for a smooth fabrication process once my deliverables are handed over to you. Rely on me to provide you with more than just a functional RF-to-digital signal chain, but also schematics (both PDF + editable files), PCB files, BOMs intricately annotated with current part numbers, and a thorough yet concise design report. Don’t hesitate to reach out; let’s discuss how we can make your project a glowing success together!
$140 USD em 7 dias
6,7
6,7

As a seasoned Electronics Engineer with extensive experience in Analog and Digital designs, I am the perfect candidate for your mixed-signal communication circuit design project. Over the years, I have become adept at combining multiple functionalities into compact and efficient designs that perfectly align with my clients' specifications. With regard to your project scope, my expertise in electrical engineering and my proficiency with industry-standard tools such as SPICE, ADS, Altium Designer, and KiCad will be instrumental in ensuring a satisfactory design output - from developing the schematic, through simulation to PCB layout. My attention to detail will guarantee that I adhere to best practices for proper mixed-signal partitioning, grounding, and impedance control. Moreover, I have developed excellent problem-solving skills from navigating the intricacies of various electronic systems over the course of my career. This, coupled with my dedication and commitment to delivering high-quality designs on time and within budget, thus meeting your acceptance criteria, makes me an exceptional fit for this project. Let me leverage my skills and expertise to help you build your desired mixed-signal circuit for a seamless RF-to-digital signal chain!
$100 USD em 2 dias
6,3
6,3

With a name like mine, Kirandeep Kaur, a confluence of graphics, illustrations and engineering skills has been cultivated. Over the past 8 years, I have honed my abilities in electronic and mechanical works as well as PCB engineering, utilizing various software such as Altium Designer, KiCad, and many more- exactly what your project requires. This versatility empowers me to understand not only the technical aspects but also the aesthetic considerations important in creating a seamless mixed-signal design that complements your desired RF-to-digital signal chain. Another key aspect your project demands is thorough simulation analysis to evaluate its efficacy at each stage. My extensive experience with SPICE, ADS and other equivalent simulation frameworks would prove beneficial here enabling me ion not just evaluating standard linearity metrics or figures like SNR,BER etc but also document it extensively helping in comprehensive and clear communication among team members or stakeholders involved regarding result reproduction for your acceptance criteria No.s 3and4). I believe in delivering best results with high efficiency; hence trust that choosing me for this project will be decision devoid of regrets and full of customer satisfaction.
$62 USD em 1 dia
5,5
5,5

Hello sir, Did go through your job description and glad to share that I have enormous experience in working with Mixed-Signal Communication Circuit Design I'm a seasoned programmer and Engineer with quality experience in Flutter, React, Node.JS, SpringBoot, Frontend and Backend Development, Python, Matlab, R studio, C, C++, C#, OpenCV, OpenGL, Tesseract OCR, google vision, Statistical programming/R progamming data analysis Computing for Data Analysis Time Series & Econometric, Machine learning, AI, Deep learning, Matlab and Mathematica, 3D modeling, CAD, SolidWorks, Unity 3D, PCB, Electronics, Arduino, Automation, Embedded and Firmware , IOT, Electrical/Mechanical Engineering I am a TOP Rated Freelancer, and you can check my reviews here as well: https://www.freelancer.com/u/mzdesmag. Looking forward to potentially working together on this project. Thanks and Best regards, Adekunle.
$30 USD em 1 dia
5,2
5,2

Hi, I have enough experience in PCB desgin and firmware development, and also in multiple communicaition(modulation/ demodulation). Also, I can support you for PCB manufacturing and prototype from our local company(READA company) in Shenzhen, China. I'm confident my skills and experience in PCB design make me a good candidate for your job. Looking forward to hearing from you soon. Kind Regards. Ting
$140 USD em 7 dias
4,9
4,9

Hello, I can design a mixed-signal circuit for a communication system, integrating signal modulation with high-accuracy ADC/DAC stages to form a reliable RF-to-digital signal chain. The result will be a validated, simulation-backed design with clean mixed-signal partitioning, controlled impedance, and production-ready documentation. All work will follow mixed-signal and RF design best practices, IPC-2221 and DFM/DFA standards for fabrication readiness. Following are the deliverables: • Schematic design and PCB layout • Gerber, Pick- and- Place, Drill files for manufacturing • Simulation results • Bill of materials I wanted to ask: • Is the carrier frequency and modulation scheme already defined, or should recommendations be included? I have 7+ years of experience in projects like: • Simulation-driven validation using SPICE and RF design tools • Production-ready PCB layouts with disciplined mixed-signal grounding My software expertise includes: • Altium designer, KiCad, EAGLE • PSpice, LTspice Thank you for considering my proposal. I’m available to clarify and discuss details further through a meeting at your ease. Best Regards, Abubakar
$121 USD em 7 dias
5,1
5,1

Best Mixed-Signal Circuit Design Partner ⭐⭐⭐⭐⭐ Hi, Thanks for sharing the scope clearly. I’ve worked on mixed-signal communication designs where precise analog performance must integrate cleanly with robust digital processing to form reliable RF-to-digital signal chains. Your project is very well defined and absolutely achievable. The goal is simple: deliver a production-ready mixed-signal design with validated performance, clean schematics, and a manufacturable PCB that transitions smoothly into prototyping. ✅ How I’ll Help You Succeed 1. Translate your system requirements into a complete mixed-signal schematic, carefully partitioning analog, RF, and digital sections. 2. Validate performance through simulation (SPICE / ADS or equivalent), documenting key metrics such as SNR, BER, ENOB, and phase noise where applicable. 3. Design a manufacturable PCB using best practices for grounding, impedance control, and noise isolation in mixed-signal layouts. ✅ I’ve delivered mixed-signal designs where simulation accuracy, layout discipline, and documentation quality were critical to moving directly from design approval to prototype fabrication without rework. ✅ Before I start, one quick thing: Do you already have target specifications for carrier frequency, bandwidth, and power budget, or would you like me to help refine those during the initial design phase? If you share that, feel free to message me and we can align quickly Best, Prat PCB Must Innovations
$250 USD em 2 dias
6,4
6,4

Hello, Abdelrahman I’m a mixed-signal and RF electronics engineer with 8+ years of experience designing end-to-end RF-to-digital signal chains, and I’ve carefully reviewed your requirements for modulation, data conversion, simulation, and PCB delivery. I’ve completed 15+ mixed-signal communication designs, including 7 RF front-ends with high-resolution ADC/DAC chains (12–16 bit, up to 250 MSPS) validated through SPICE and ADS simulations. For this project, I will design a clean modulation stage that meets your carrier and linearity targets, then integrate a low-noise, power-efficient data-conversion block optimized to stay within budget while preserving SNR, ENOB, and BER margins. I routinely validate designs using SPICE/ADS test benches, delivering clear plots for SNR, BER, ENOB, and phase noise, ensuring simulation results directly map to real-world performance. On the hardware side, I’ve laid out 20+ mixed-signal PCBs in Altium and KiCad, applying strict analog/digital partitioning, controlled-impedance routing, and low-noise grounding strategies. I also provide production-ready BOMs with verified, in-stock components to avoid fabrication delays. You’ll receive complete schematics, PCB files, simulation results, and a concise design report ready for immediate prototyping. If available, I’d like to confirm the target carrier frequency, ADC/DAC resolution, and power budget to finalize the architecture efficiently.
$140 USD em 7 dias
4,4
4,4

✅Okay, I got what you want exactly. I am a mixed-signal circuit designer with over 10 years of experience, providing RF modulation, high-resolution ADC/DAC integration, and PCB layout for high-speed communication systems. In my opinion, a well-partitioned mixed-signal architecture with careful grounding and impedance control will ensure both clean RF performance and accurate digital conversion. By combining SPICE simulations with layout-aware design practices, we can minimize phase noise and maximize ENOB across the chain. This project is very similar to my previous works. I recently developed a 2.4 GHz transceiver front-end where I integrated a 12-bit, 80 MSPS ADC with a QPSK modulation block, validated SNR and BER through MATLAB and ADS simulations, and completed a PCB layout in Altium observing strict mixed-signal separation and controlled impedance for high-speed traces. Another project involved designing a multi-channel sensor interface with a 14-bit DAC, achieving <1% THD while maintaining low power consumption. ✅ So, I will divide your project like following: ⚡ Schematic design integrating the modulation and ADC/DAC stages. ⚡ Simulation and validation of key performance metrics (SNR, BER, ENOB, phase noise). ⚡ PCB layout with mixed-signal best practices, grounding, and impedance control. ⚡ BOM preparation with current-production components. ⚡ Final documentation and design report with annotated schematics and plots. Best regards, Yaroslav
$140 USD em 7 dias
3,2
3,2

I am a Licensed Professional Electrical Engineer with 6+ years of experience in mixed-signal circuit design and MATLAB simulation. MATLAB simulation and coding is my core expertise with extensive experience in RF communication systems, modulation techniques, and data converter modeling. I'll develop a complete mixed-signal RF-to-digital signal chain design in MATLAB with comprehensive performance validation. My approach includes complete circuit architecture development integrating modulation block with high-resolution ADC/DAC stages, comprehensive MATLAB simulation validating SNR, BER, ENOB, and phase noise performance, modulation stage implementation meeting specified carrier frequency and linearity metrics, data conversion modeling achieving target resolution and sample rate within power budget constraints, and detailed performance analysis with simulation plots demonstrating compliance with specifications. I'll deliver complete MATLAB simulation files with modular architecture and well-documented code, detailed schematic documentation (PDF format) showing signal chain architecture and component specifications, comprehensive simulation results with SNR, BER, ENOB, and phase noise analysis plots, annotated Bill of Materials with production-ready component part numbers, and concise design report documenting architecture decisions, performance validation, and implementation guidance for PCB layout phase. Let's discuss l Best regards, Tahir Saleem
$170 USD em 2 dias
3,6
3,6

MIXED-SIGNAL COMMUNICATION CIRCUIT DESIGN Dear Client, You’re essentially building a mixed-signal communication circuit that must seamlessly combine modulation, high-resolution ADC/DAC conversion, and a reliable RF-to-digital signal path—without compromising signal integrity or data fidelity. That’s exactly the kind of production-focused mixed-signal design I specialize in. Here’s how I’d approach it: ✅ Complete schematic development integrating modulation circuitry with precision ADC/DAC stages, selecting components optimized for linearity, low phase noise, and target SNR ✅ Simulation and validation using SPICE/ADS or equivalent tools, with documented performance including SNR, BER, ENOB, and phase noise, ensuring design meets target specifications ✅ PCB layout for mixed-signal performance using Altium Designer or KiCad, with careful analog/digital partitioning, controlled impedance traces, proper grounding, and isolation of sensitive RF paths I have 11+ years of experience designing mixed-signal and RF systems, including high-performance data-conversion chains and industrial-grade communication hardware. Quick question to align early: do you already have target carrier frequencies, ADC/DAC resolutions, or modulation standards, or should I propose component-level options optimized for your system requirements? Best regards, Avi Gupta
$250 USD em 2 dias
3,0
3,0

Hi, I have gone through your task requirements, and I can design this mixed signal circuit in Altium. I'll validate the performance in Keysight ADS and provide you all the deliverables. Please reply back to further discuss the task. Thanks
$250 USD em 7 dias
2,9
2,9

⚡⚡⚡Mixed-Signal RF & Data Conversion Design⚡⚡⚡ Hello, I have designed mixed-signal circuits integrating RF modulation with high-resolution ADC/DAC stages, ensuring accurate signal conversion and low-noise performance. I recently completed a communication board with verified SNR, BER, and phase-noise metrics through SPICE simulation. My approach: develop a full schematic, optimize PCB layout for mixed-signal integrity, and provide annotated BOM with simulation-backed performance validation. Questions: Target carrier frequency and modulation type? Required ADC/DAC resolution and sample rate? Any preferred PCB layer count or impedance constraints? Thanks
$140 USD em 7 dias
2,8
2,8

Hi There, I understand that you need a mixed-signal circuit designed specifically for a communication system. My expertise in developing integrated designs, particularly in signal modulation and high-resolution data conversion, directly aligns with your project requirements. I am Adil Yousuf, an experienced electrical engineer with over 6 years of expertise in Electronics, Electrical Engineering, PCB Layout, Circuit Design, Digital Electronics, Signal Processing, Analog Electronics, and Altium Designer. Here are some of my relevant portfolio links: https://www.freelancer.com/u/adily1 I have successfully delivered similar projects, ensuring high performance through thorough simulations and meticulous PCB layouts adhering to best practices. I am confident that I can meet the acceptance criteria you’ve outlined, ensuring a seamless transition from design to prototype. Thank you for considering my proposal. Regards, Adil Yousuf
$30 USD em 7 dias
0,0
0,0

Hi , I just went through the project description, and I see you are looking for someone experienced in Circuit Design, Electronics, Analog Electronics, Signal Processing, Altium Designer, PCB Layout, Electrical Engineering and Digital Electronics. It instantly reminded me of a client who faced similar challenges, and I knew I had a tailor-made solution for it. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: • Is there anything else you’d like to add to the project details? • What’s the top hurdle you’re facing with this project? • What is the timeline to get this done? Why Choose Me? 250+ Projects. 5 Years. Zero Misses. My reputation is built on a single metric: Flawless Execution. While others promise quality, my last 100+ consecutive 5-star reviews prove it. I don’t just finish the job; I set the standard. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) The portfolio here is just the tip of the iceberg. To respect client confidentiality, my recent heavy-hitters aren't public, but I can share them 1-on-1. Click the 'Chat' button, and I’ll send over the relevant samples immediately for your review. Regards, Abdul Haseeb Siddiqui.
$30 USD em 2 dias
0,0
0,0

Dear Client, How are you? I hope this proposal finds you well. I'M A CERTIFIED & EXPERIENCED EXPERT This is to inform you that I have KEENLY gone through your project description, CLEARLY understood all the project requirements as instructed in your project proposal and this is to let you know that I will perfectly deliver as desired. Being in possession of all stated required skills as this is my field of professional specialization having completed all certifications and developed adequate experience in the respective field, I hereby humbly request you to consider my bid for professional, quality and affordable services that meet all your requirements. I always guarantee timely delivery and unlimited revisions where necessary hence you are assured of utmost satisfaction when working with me. Please send me a message so that we can discuss more and seal the project. WELCOME.
$250 USD em 1 dia
0,0
0,0

Drawing from my eight years of experience as an electrical engineer, specializing in the field of electronics, I am certain that I can deliver all you need for your mixed-signal communication circuit design project. My expertise revolves around designing high-quality, reliable RF-to-digital signal chains that align harmoniously with all the specifications you've outlined, from the chosen modulation block to accurate data conversion and beyond. In my arsenal of skills, I possess a comprehensive knowledge of rendering precise and effective simulations using SPICE, ADS, or their functional equivalents. Consequently, my past work inherently requires paying close attention to linearity metrics such as SNR, BER, ENOB and phase noise; facets that are critical for your project's success. Additionally, as a 3D artist with a keen eye for meticulousness, I am confident in diligently adhering to best-practice mixed-signal partitioning while laying out the PCB. My adeptness in software such as Altium Designer and KiCad amplifies my ability to furnish you with well-annotated PCB files, complete with a concise BOM with current part numbers. Paired with my commitment to unlimited revisions and the principle of 100% client satisfaction guaranteed in every single job undertaken, choosing me would mean embarking on a partnership designed to not just fulfill your requirements but exceed your expectations! Let's bring your ideas to life together!
$152 USD em 2 dias
0,0
0,0

Greetings, I specialize in mixed-signal and RF-to-digital system design and can deliver a robust, simulation-verified solution that integrates modulation, high-resolution data conversion, and clean PCB implementation. I will develop the complete schematic, validate performance through SPICE or RF simulation workflows, and document key metrics including SNR, BER, ENOB, and phase noise where applicable. The PCB layout will follow proven mixed-signal best practices for grounding, partitioning, and impedance control to ensure reliable real-world performance. You will receive fully editable schematics, layout files, a production-ready BOM with in-stock components, and a concise design report ready for immediate prototyping.
$100 USD em 2 dias
0,0
0,0

Cairo, Egypt
Membro desde jan. 12, 2026
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