A dual-channel CMOS transimpedance amplifier array with automatic gain control for unmanned vehicle LADARs

Chaerin Hong, Sung Min Park

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, a dual-channel feed-forward transimpedance(TIA) array is realized in a standard 0.18-μm CMOS technology which exploits automatic gain control function to provide 40-dB input dynamic range for either detecting targets nearby or sensing imminent danger situations. Compared to the previously reported conventional feed-forward TIA, the proposed automatic-gain-control feed-forward TIA(AFF-TIA) extends the input dynamic range 25 dB wider by employing a 4-level automatic gain control circuit. Measured results demonstrate the linearly varying transimpedance gain of 47 to 72 dBΩ, input dynamic range of 1:100, the bandwidth of ≧670 MHz, the equivalent input referred noise current spectral density of 6.9 pA/VHZ, the maximum sensitivity of - 26.8 dBm for 10-12 BER, and the power consumption of 27.6 mW from a single 1.8-V supply. The dual-channel chip occupies the area of 1.0 × 0.73 mm2 including I/O pads.

Original languageEnglish
Pages (from-to)831-835
Number of pages5
JournalTransactions of the Korean Institute of Electrical Engineers
Volume65
Issue number5
DOIs
StatePublished - May 2016

Keywords

  • AGC
  • CMOS
  • Dynamic range
  • Feedforward
  • LADAR
  • TIA

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