A Low Walk Error Analog Front-End Circuit With Intensity Compensation for Direct ToF LiDAR

Wang, Xiayu; Ma, Rui; Li, Dong; Zheng, Hao; Liu, Maliang; Zhu, Zhangming

doi:10.1109/tcsi.2020.3022714

Cited by 40 publications

(14 citation statements)

References 27 publications

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“…The noise of the receiver (without the contribution of the APD dark current or signal shot noise) was around ~3nArms, with a relatively high input capacitance, estimated at ~3.5pF. This noise level was much lower than those typically achieved with recently published laser radar receivers [15,16,17,18,25]. It was also shown by using the designed receiver in a pulsed TOF laser radar configuration that it allows single shot measurements of distances to non-cooperative targets over a range of several hundred metres with a modest laser power of 4W and a receiver aperture of 20mm.…”

Section: Discussionmentioning

confidence: 75%

“…This means that the input-referred equivalent rms current noise of the receiver should be only a few nanoamperes, in order to achieve the SNR of 5…10 which is needed for reliable single shot detection of the laser pulse echo. This is a markedly lower value than is typically available in wide-band receivers (50…100nArms, as in [15,17,25], for example), and thus optimization of the receiver with respect to noise is needed [26].…”

Section: A the Signal-to-noise Ratio In Laser Rangingmentioning

confidence: 98%

“…As is seen in Fig. 3, timing pulses of higher amplitude are also wider at the detection threshold, and thus it is obviously possible to compensate for the timing walk error by measuring the width of the timing pulse (and/or its rise time) [17,23,25]. The use of this method typically necessitates a separate calibration measurement in which the relation between the measured time-domain parameter (e.g.…”

Section: B Timing Jitter and Timing Walk Errormentioning

confidence: 99%

“…The need to be able to detect multiple echoes and reduce the timing walk error may still favour the use of short laser pulses and a higher bandwidth, but if distances of several hundreds of metres to non-cooperative targets are aimed at with laser diodes having a pulse power in the 10W region, the receiver sensitivity should be optimized from the SNR point-of-view, as discussed in detail in later sections. The resulting larger intrinsic timing walk error can be minimized by measuring the time parameters (pulse width and/or rise time) from the detected echo pulse, as recently suggested in [17,23,24,25], for example.…”

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confidence: 99%

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A Low-Noise and Wide Dynamic Range 15 MHz CMOS Receiver for Pulsed Time-of-Flight Laser Ranging

et al. 2021

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A laser radar receiver channel targeted at pulsed time-of-flight laser radar applications using 5ns…20ns laser pulses at the 1550nm wavelength region has been designed. The receiver includes a transimpedance preamplifier, post-amplifiers and analog output buffer and has a bandwidth of 15MHz and input reduced total equivalent current noise of ~3nArms without the contribution of the APD noise. The receiver supports both the single shot and transient recording operation modes. By utilizing the time domain compensation methods, the single shot timing walk is at the level of +/-100ps within a wide dynamic range of 1: 36 000 of the received echo amplitudes. It is demonstrated that the designed receiver allows the pulsed time-of-flight measurement in the single shot mode to noncooperative targets up to distances of several hundreds of meters with a laser pulse power of 4 W and receiver aperture of 20mm.

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Section: Discussionmentioning

confidence: 75%

Section: A the Signal-to-noise Ratio In Laser Rangingmentioning

confidence: 98%

Section: B Timing Jitter and Timing Walk Errormentioning

confidence: 99%

mentioning

confidence: 99%

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A Low-Noise and Wide Dynamic Range 15 MHz CMOS Receiver for Pulsed Time-of-Flight Laser Ranging

et al. 2021

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“…Therefore, it could not avoid the increase of cost and form factor. References [ 12 , 13 , 14 , 15 ] exploited off-chip APDs, which resulted in hardware complexity in an array configuration of multi-channel receivers.…”

Section: Measured Resultsmentioning

confidence: 99%

A CMOS Optoelectronic Receiver IC with an On-Chip Avalanche Photodiode for Home-Monitoring LiDAR Sensors

Joo

Lee

Park

2021

Sensors

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This paper presents an optoelectronic receiver (Rx) IC with an on-chip avalanche photodiode (APD) realized in a 0.18-mm CMOS process for the applications of home-monitoring light detection and ranging (LiDAR) sensors, where the on-chip CMOS P+/N-well APD was implemented to avoid the unwanted signal distortion from bondwires and electro-static discharge (ESD) protection diodes. Various circuit techniques are exploited in this work, such as the feedforward transimpedance amplifier for high gain, and a limiting amplifier with negative impedance compensation for wide bandwidth. Measured results demonstrate 93.4-dBW transimpedance gain, 790-MHz bandwidth, 12-pA/√Hz noise current spectral density, 6.74-mApp minimum detectable signal that corresponds to the maximum detection range of 10 m, and 56.5-mW power dissipation from a 1.8-V supply. This optoelectronic Rx IC provides a potential for a low-cost low-power solution in the applications of home-monitoring LiDAR sensors.

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A strip line technique based 1 Gb/s, 70-dB linear dynamic range transimpedance amplifier towards LiDAR unmanned vehicle application

Gorre

Vignesh

Kumar

2022

Microelectronics Journal

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A Low Walk Error Analog Front-End Circuit With Intensity Compensation for Direct ToF LiDAR

Cited by 40 publications

References 27 publications

A Low-Noise and Wide Dynamic Range 15 MHz CMOS Receiver for Pulsed Time-of-Flight Laser Ranging

A Low-Noise and Wide Dynamic Range 15 MHz CMOS Receiver for Pulsed Time-of-Flight Laser Ranging

A CMOS Optoelectronic Receiver IC with an On-Chip Avalanche Photodiode for Home-Monitoring LiDAR Sensors

A strip line technique based 1 Gb/s, 70-dB linear dynamic range transimpedance amplifier towards LiDAR unmanned vehicle application

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