Dismiss
InnovationQ and the IP.com Prior Art Database will be updated on Sunday, December 15, from 11am-2pm ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

Transimpedance Amplifier (TIA) with Coupled Inductor in the Feedback Path for Bandwidth Enhancement

IP.com Disclosure Number: IPCOM000016006D
Original Publication Date: 2002-Aug-27
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue

IBM

Abstract

Abstract This proposal describes a new method for broadening the bandwidth of a shunt-shunt feedback-type transimpedance amplifier by applying a coupled inductor in the feedback path. The inductive coupling occurs between the inductor in the feedback path and an inductor used for shunt or series peaking [1] (in the following series peaking is assumed). Introduction The block diagram of a typical optical receiver front-end is shown in Fig. 1. It consists of a reverse biased photodiode (PD), a transimpedance amplifier (TIA), a limiting amplifier (LA) and a clock and data recovery (CDR) circuit with decision (DEC) unit. The PD delivers an output current that is proportional to the optic power. The TIA acts as current-to-voltage converter and the LA receives the small voltage signal from the TIA and amplifies it to a level sufficient for a reliable operation of the CDR circuit.