Patent ID: 7468633

Claim:
A differential transimpedance amplifier (TIA) circuit comprising: a first transconductance amplifier having an input, an output and a first transconductance gain; a second transconductance amplifier having an input that communicates with said output of said first transconductance amplifier, an output and a second transconductance gain; a third transconductance amplifier having an input that communicates with said output of said second transconductance amplifier, an output and a third transconductance gain; a first resistance having one end that communicates with said output of said third transconductance amplifier and an opposite end that communicates with said input of said second transconductance amplifier; a second resistance having one end that communicates with said output of said third transconductance amplifier and an opposite end that communicates with said input of said third transconductance amplifier; a fourth transconductance amplifier having an input, an output and a fourth transconductance gain; a fifth transconductance amplifier having an input that communicates with said output of said fourth transconductance amplifier, an output and a fifth transconductance gain; a sixth transconductance amplifier having an input that communicates with said output of said fifth transconductance amplifier, an output and a sixth transconductance gain; a third resistance having one end that communicates with said output of said sixth transconductance amplifier and an opposite end that communicates with said input of said fifth transconductance amplifier; a fourth resistance having one end that communicates with said output of said sixth transconductance amplifier and an opposite end that communicates with said input of said sixth transconductance amplifier; a fifth resistance having one end that communicates with said output of said third transconductance amplifier and an opposite end that communicates with said input of said fourth transconductance amplifier; and a sixth resistance having one end that communicates with said output of said sixth transconductance amplifier and an opposite end that communicates with said input of said first transconductance amplifier.