A high speed and high gain CMOS receiver chip for a pulsed time-of-flight laser rangefinder

Jin-jin Yu; Ruo-han Deng; Hong-hui Yuan; Yong-ping Chen

doi:10.1117/12.900568

19 August 2011 A high speed and high gain CMOS receiver chip for a pulsed time-of-flight laser rangefinder

Jin-jin Yu, Ruo-han Deng, Hong-hui Yuan, Yong-ping Chen

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 819229 (2011) https://doi.org/10.1117/12.900568
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

An integrated receiver channel for a pulsed time-of-flight (TOF) laser rangefinder has been designed. Pulsed TOF laser range finding devices using a laser diode transmitter can achieve millimeter-level distance measurement accuracy in a measurement range of several tens of meters to non-cooperative targets. The amplifier exploits the regulated cascade (RGC) configuration as the input-stage, thus achieving as large effective input trans-conductance as that of Si Bipolar or GaAs MESFET. The RGC input configuration isolates the input parasitic capacitance including photodiode capacitance from the bandwidth determination better than common-gate TIA. To enlarge the bandwidth, inductive peaking technology has been adopted. An active inductor (MOS-L) is used instead of spiral inductor in CMOS process. An R-2R resistor ladder is inserting between per-amplifier and post-amplifier as the variable attenuator for digital gain control purpose. The gain-bandwidth of a basic differential pair with resistive load is not large enough for broad band operation. A circuit solution to improve both gain and bandwidth of an amplifying stage is proposed. Traditional and modified Cherry-Hooper amplifiers are discussed and the cascading of several stages to constitute the post-amplifier is designed. The fully integrated one-chip solution is designed with Cadence IC design platform. The simulation result shows the bandwidth of the trans-impedance amplifier is 215MHz with the presence of a 2pF input capacitor and 5pF load capacitor. And the maximum trans-impedance gain is 136dB. The walk error is less than 1ns in 1:1000 dynamic range. The responsive time is less than 2.2ns.

Citation Download Citation

Jin-jin Yu, Ruo-han Deng, Hong-hui Yuan, and Yong-ping Chen "A high speed and high gain CMOS receiver chip for a pulsed time-of-flight laser rangefinder", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 819229 (19 August 2011); https://doi.org/10.1117/12.900568

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KEYWORDS

Optical amplifiers

Pulsed laser operation

Capacitance

Receivers

Amplifiers

Resistors

Attenuators

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