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An InP-Based 27-GHz-Bandwidth Limiting TIA IC Designed to Suppress Undershoot and Ringing in Its Output Waveform
IEICE TRANSACTIONS on Electronics
Publication Date: 2016/03/01
Online ISSN: 1745-1353
Type of Manuscript: PAPER
Category: Electronic Circuits
transimpedance amplifier, limiting amplifier, output-stage amplifier, undershoot, ringing, RSSI,
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A design scheme for a high-speed differential-input limiting transimpedance amplifier (TIA) was developed. The output-stage amplifier of the TIA is investigated in detail in order to suppress undershoot and ringing in the output waveform. The amplifier also includes a peak detector for the received signal strength indicator (RSSI) output, which is used to control the optical demodulator for differential-phase-shift-keying or differential-quadrature-phase-shift-keying formats. The limiting TIA was fabricated on the basis of 1-µm emitter-width InP-based heterojunction-bipolar-transistor (HBT) IC technology. Its differential gain is 39 dB, its 3-dB bandwidth is 27 GHz, and its estimated differential transimpedance gain is 73 dBΩ. The obtained output waveform shows that the developed design scheme is effective for suppressing undershoot and ringing.