A Low Power BiCMOS Transimpedance Amplifier with Stable Input Impedance up to 50 GHz Designed for Large-Area Detectors | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article A Low Power BiCMOS Transimpedance Amplifier with Stable Input Impedance up to 50 GHz Designed for Large-Area Detectors Seyed Arash Katourani, Meysam Akbari This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6303963/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract This paper presents a novel design methodology for a transimpedance amplifier (TIA) featuring low input resistance. The low input resistance of the proposed TIA is achieved through the implementation of various analog circuit techniques, such as the regulated cascode (RGC) and flip voltage follower (FVF), further enhanced by the advantages of BiCMOS technology. A key characteristic of the proposed design is its ability to maintain a consistently low input impedance across high frequencies without exhibiting inductive behavior or negative resistance, which are common limitations in conventional TIAs. The combination of low input impedance and the absence of inductive behavior makes the TIA a strong candidate for front-end readouts of large-area sensors. The large sensor capacitance can degrade performance; however, a low-impedance readout mitigates this effect. If the impedance were inductive, it could resonate with the sensor’s capacitance, causing instability. The proposed TIA effectively addresses both concerns by maintaining low input impedance without introducing inductive behavior. Another notable feature of the proposed TIA is its self-biased architecture, which simplifies the implementation of bipolar transistors, making the circuit more reliable and easier to integrate. The circuit is designed and implemented in IHP-GmbH 130 nm BiCMOS technology. Simulation results validate the performance of the proposed TIA, demonstrating an input resistance of 50 Ω (over the range of 50 GHz), a bandwidth of 710 MHz (with a 10 pF detector capacitor), and a power consumption of 3.4 mW. TIA Large-area detector FVF RGC BiCMOS Full Text Additional Declarations No competing interests reported. Supplementary Files untitled1312V5.sch Cite Share Download PDF Status: Under Review Version 1 posted Reviewers invited by journal 19 Apr, 2025 Editor assigned by journal 25 Mar, 2025 Submission checks completed at journal 25 Mar, 2025 First submitted to journal 25 Mar, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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