Abstract
This paper describes a CMOS interface circuit for silicon photonics. 20-Gb/s operation of an optical receiver front-end circuit is demonstrated using an optical signal applied to the optical front-end. The transimpedance amplifier (TIA) is based on an inverter with resistive and inductive feedback for low power consumption and frequency compensation. A negative capacitance generation is employed in the limiting amplifier (LA) for bandwidth extension. The combined TIA and LA block exhibits a transimpedance gain of 78 dBΩ and a bandwidth of 11 GHz. The TIA and the LA block consume 1.3 mA and 24 mA at 1 V supply voltage, respectively.
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