Patent ID: 7535301
Filing Date: 2009-05-19
Classification: H03F

Abstract:
1. A differential transimpedance amplifier circuit, comprising: a first amplifier having an input, an output and a first transconductance; a second amplifier having an input that communicates with said output of said first amplifier, an output and a second transconductance; a first resistance having one end that communicates with said input of said first amplifier; a second resistance having one end that communicates with said input of said second amplifier and an opposite end that communicates with said output of said second amplifier; a third amplifier having an input, an output and a third transconductance; a fourth amplifier having an input that communicates with said output of said third amplifier, an output and a fourth transconductance; a third resistance having one end that communicates with said input of said third amplifier; a fourth resistance having one end that communicates with said input of said fourth amplifier and an opposite end that communicates with said output of said fourth amplifier; a fifth amplifier having an input that communicates with said output of said second amplifier, an output and a fifth transconductance; a sixth amplifier having an input that communicates with said output of said fifth amplifier, an output and a sixth transconductance; a seventh amplifier having an input that communicates with said output of said fourth amplifier, an output and a seventh transconductance; a eighth amplifier having an input that communicates with said output of said seventh amplifier, an output and a eighth transconductance, wherein an opposite end of said first resistance communicates with said output of said eighth amplifier, and wherein an opposite end of said third resistance communicates with said output of said sixth amplifier.