Patent ID: 7312659
Filing Date: 2007-12-25
Classification: H03F

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