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Advancement of CMOS Transimpedance Amplifier for Optical Receiver
摘要： Transimpedance amplifier (TIA) is an essential component of optical receivers, and this type of amplifier converts the photocurrent to a voltage signal. The overall performance of the optical receiver greatly depends on the performance of this component. Low-power, low-noise, and compact TIA has been realized in current development in CMOS technology. The high demands of an optical receiver has led to the optimization and development of the TIA designed specifications. However, the conventional CMOS TIA design is limited mainly because of its dependency on input node capacitance. In this article, the advancement of TIAs in data communication and instrumentation based on different design architectures and performances is discussed. This review will serve as a comparative study and reference for designing fully integrated CMOS TIA for future optical receivers.
关键词： TIA,Gain,CMOS,Sensor,Optical receiver
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE 9th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON) - Vancouver, BC, Canada (2018.11.1-2018.11.3)] 2018 IEEE 9th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON) - A CNTFET based Multi-Stage Transimpedance Amplifier for Blood Glucose Monitoring Systems
摘要： In this paper, the design of an ultra-low-power, low noise carbon nanotube field effect transistor (CNTFET) based transimpedance amplifier (TIA) for an amperometric based blood glucose monitoring system for wearable devices is presented. The proposed cascode common source multi-stage TIA is designed and implemented in CNTFET technology. It has been demonstrated that the performance of the proposed TIA can be enhanced by considering an optimum number of CNTs, the CNT pitch and CNT diameter. The TIA shows a significant transimpedance gain, 572 M?, with a bandwidth of 200 MHz and an input referred current noise of 8.3 fA/√Hz for an input current of 2 nA. The total power consumption is 11 pW with a 1.8 V supply.
关键词： CNTFET,TIA,Multi-Stage,Low-Power,Cascode-Common-Source
更新于2025-09-19 17:15:36
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A 60-m Range 6.16-mW Laser-Power Linear-Mode LiDAR System With Multiplex ADC/TDC in 65-nm CMOS
摘要： This paper presents a linear-mode light detection and ranging (LiDAR) analog front-end architecture with multiplex analog-to-digital converter/time-to-digital converter (ADC/TDC). An added voltage-to-time converter (VTC) and a reused TDC are simultaneously used to implement the ADC and TDC function, thus replacing discrete ADC and TDC, saving hardware cost and reducing power consumption. A three-stage inverter-based transimpedance amplifier (TIA) with ultra-low-power, low-noise and high/low gain mode (long/short range mode) is proposed to reduce its influence to optical signal-to-noise ratios (OSNR). The prototype TIA and ADC/TDC is fabricated in the 65-nm CMOS technology and integrated into the single-line APD-based LiDAR system. The receiver front-end of TIA and ADC/TDC only consumes 12.44-mW. The minimum detection current of the receiver front-end is less than 238 nA with bandwidth of 150MHz for long-range and weak-light detection. LiDAR achieves a measurement range of 60 m with a 70-klx direct sunlight and only 6.16 mW average laser power. Experimental results show that this architecture is suitable for low-cost multi-line integrated LiDAR applications compared to conventional architecture using ADC, TDC, ADC+TDC architecture.
关键词： VTC,measurement range,ADC/TDC,TIA,optical signal-to-noise ratios,APD,analog front-end,CMOS,LiDAR,power consumption
更新于2025-09-16 10:30:52
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12.5: A Depletion‐mode Compatible Gate Driver on Array for a‐IGZO TFT‐OLED Displays
摘要： Background and purpose: Studies suggest that smoking affects clopidogrel efficacy. However, whether it influences the association between CYP2C19 genetic variants and clopidogrel efficacy is not clear. Methods: In total, 2961 patients from the CHANCE trial were involved in this substudy and were successfully genotyped for two single-nucleotide polymorphisms of CYP2C19 (*2 and *3). The Cox proportional risk regression model was used to evaluate the interactions between CYP2C19*2 and CYP2C19*3 carrier status and clopidogrel efficacy stratified by smoking status. Results: There were marginal significant interactions between CYP2C19*2 and CYP2C19*3 allele carrier status and antiplatelet treatment regimen for the risk of recurrent stroke and composite events (P = 0.054, P = 0.051, respectively) amongst smokers, but not in non-smokers. Amongst smokers, clopidogrel plus aspirin decreased the recurrence rate of stroke compared with aspirin alone in non-carriers (3.8% vs. 11.8%, hazard ratio 0.32, 95% confidence interval 0.15–0.65, P = 0.002), but not in carriers. Similar results were also found for the recurrence rate of composite events in smokers. No significant difference was found for hemorrhage events in any group. Conclusions: Amongst patients with minor stroke or transient ischaemic attack, marginal significant interactions between CYP2C19*2 and CYP2C19*3 allele carrier status and clopidogrel efficacy were found in smokers but not in non-smokers. Amongst smokers, clopidogrel plus aspirin might decrease the recurrence rate of stroke in non-carriers of *2 and *3 alleles of CYP2C19 compared with aspirin alone. However, caution should be taken to interpret our findings in view of several limitations in our study.
关键词： minor stroke,CYP2C19,smoking,antiplatelet,clopidogrel,TIA
更新于2025-09-11 14:15:04
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A 26-Gb/s 3-D-Integrated Silicon Photonic Receiver in BiCMOS-55 nm and PIC25G With ?15.2-dBm OMA Sensitivity
摘要： This letter presents a 3-D-integrated 26 Gb/s opto-electrical receiver front-end. The electronic integrated circuit (EIC) is fabricated in a BiCMOS-55-nm technology, ?ipped and placed on top of the photonic integrated circuits (PICs) die through copper pillars. In the receiver chain, a fully differential shunt-feedback TI ampli?er (FD-SF TIA) is followed by a limiting ampli?ers (LAs) with embedded equalization, output driver and an automatic offset cancelation loop. The whole receiver provides a transimpedance (TI) gain of 76 dB(cid:2) with 30-GHz bandwidth. By exploiting the FD-SF TIA with low parasitic capacitance of the Germanium dual heterojunction photo diode (Ge-PD) in the photonic die, the receiver achieves sensitivity of ?15.2 dBm optical modulation amplitude (OMA) at Ge-PD and ?10-dBm OMA at the single-mode ?12 and PRBS 15. ?ber (SMF) optical output with bit error rate of 10 The sensitivity is aligned with state-of-the-art receivers employing discrete photonics and, to author’s best knowledge, it is the lowest reported among published 25 Gb/s receivers exploiting silicon photonics.
关键词： Germanium dual heterojunction photo diode (Ge-PD),3-D-integrated,transimpedance ampli?er (TIA),limiting ampli?er (LA),opto-electrical receiver
更新于2025-09-11 14:15:04
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[IEEE 2018 IEEE 2nd International Conference on Circuits, System and Simulation (ICCSS) - Guangzhou, China (2018.7.14-2018.7.16)] 2018 IEEE 2nd International Conference on Circuits, System and Simulation (ICCSS) - Application of an Infinite Gain Multiple Feedback Filter in VLC Link Range Extension
摘要： This paper presents a visible light communication (VLC) link range extension, achieved by establishing a VLC system using simple, low-cost, and reliable electronic circuitry, and employing a design of a highly resonant frequency selective active band pass filter (infinite gain multiple feedback filter) at the receiver section of the system. The filter was designed for a specific center (resonant) frequency with high Quality factor and gain. An outline of the relationship between Signal-to-Noise ratio (SNR) and transmission distance for three different center frequencies was presented. Results show that by utilizing an IGMF filter at the receiver, a signal-to- noise ratio above 10dB at a distance beyond 1.5 meters can be achieved without any form of lensing at either the transmitter or receiver.
关键词： Signal-to-Noise Ratio (SNR),Infinite Gain Multiple Feedback (IGMF),Visible Light Communications (VLC),LED,Trans-Impedance Amplifier (TIA)
更新于2025-09-10 09:29:36
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34-GBd Linear Transimpedance Amplifier for 200-Gb/s DP-16-QAM Optical Coherent Receivers
摘要： High spectral ef?ciency offered by the coherent optical communication links makes them attractive for the next-generation optical communication links. Using advanced modulation schemes such as dual-polarization quadrature-amplitude modulation (DP-QAM) data rates beyond 200 Gb/s can be achieved. A key component of such links is the wide-bandwidth and high-linearity coherent optical receiver. In this paper, we present a fully differential (FD) optical receiver architecture consisting of a variable-gain transimpedance ampli?er (VG-TIA) followed by a VG ampli?er (VGA). The proposed optical receiver employs a dual-feedback automatic gain control (AGC) loop that controls both the front-end VG-TIA and the following VGA to achieve both low-noise and high-linearity operation. A new photodiode (PD) dc current cancellation scheme is developed and implemented for the full differential front-end TIA. A prototype dual-TIA chip is fabricated in a 0.13-μm SiGe BiCMOS process. The presented TIA achieves 20-pA/√Hz input-referred noise (IRN) density, 27-GHz, 3-dB bandwidth, and 1.5% total harmonic distortion (THD) at 1-mApp input PD current and 500-mVpp output voltage swing. This enables the 34-GBd operation with the bit error rate (BER) of 10?10 and 5.4 × 10?4 using DP-QPSK and DP-16-QAM formats at optical signal-to-noise ratios (OSNRs) of 25 and 30 dB, respectively, demonstrating the 100- and 200-Gb/s single wavelength optical coherent receiver operation. The dual-TIA chip occupies an area of 1.4 mm × 1.6 mm and consumes 313 mW per channel at 34 GBd from a 3.3-V supply.
关键词： dual-polarization (DP)-QPSK,Automatic gain control (AGC),coherent optical communication link,coherent optical receiver,silicon photonics,Linear transimpedance ampli?er (TIA),SiGe,DP-16-quadrature-amplitude modulation (QAM)
更新于2025-09-04 15:30:14