A Linear-Array Receiver AFE Circuit Embedded 8-to-1 Multiplexer for Direct ToF Imaging LiDAR Applications

被引：7

作者：

Zheng, Hao ^{[1
]}

Ma, Rui ^{[2
]}

Wang, Xiayu ^{[2
]}

Li, Dong ^{[2
]}

Hu, Jin ^{[2
]}

Liu, Yang ^{[2
]}

Zhu, Zhangming ^{[2
]}

机构：

[1] High Thch Inst Xian, Xian 710075, Peoples R China

[2] Xidian Univ, Sch Microelect, Shaanxi Key Lab Integrated Circuits & Syst, Xian 710071, Peoples R China

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2022年 / 69卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Analog front-end; linear-array LiDAR receiver; transimpedance amplifier; multiplexer; electronic scanner; dToF; ANALOG FRONT-END; NOISE;

D O I：

10.1109/TCSI.2022.3204639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To increase the light detection and ranging (LiDAR) system spatial resolution, the multiple photodetectors are typically deployed in the receiver. An equivalent linear-array receiver with multiplexing operation scheme is presented for the direct time of flight (dToF) LiDAR applications. In particular, the analog front-end (AFE) circuit of the proposed receiver mainly consists of eight transimpedance preamplifiers (preTIAs), a dummy preTIA, a post amplifier (PA) with an 8-to-1 multiplexer, an analog output buffer and a timing discriminator. The proposed AM circuit, which achieves a transimpedance gain of similar to 106 dB Omega, a bandwidth of similar to 220 MHz, an equivalent input-referred noise current of similar to 5.1 pA/Hz(0.5) and a channel switchover time of 6 ns, was fabricated in a 65 nm standard CMOS technology. The associated DC power consumption is 137 mW with a power supply of 2.5 V. The total area of the proposed AFE circuit, which includes the circuit core, bias circuits and I/O PADs, is approximately equal to 1.2 x 1.2 mm(2).

引用

页码：5050 / 5058

页数：9