Patent ID: 7227420

Claim:
A transimpedance amplifier comprising: a first amplifier circuit for generating a first output voltage and a second amplifier circuit for generating a second output voltage, wherein the first and second amplifier circuits are mutually symmetrical, each amplifier circuit further comprising: a first stage having an input terminal connected directly to a current source for generating a first voltage signal from an input current, wherein the input current is supplied at a first node, and the first stage has a first transistor, the input connection of the first transistor being connected to the first node, and the potential at the output connection of the first transistor forming the first voltage signal, a second stage generating a second voltage signal from the first voltage signal, wherein the second stage has a second transistor, the first voltage signal being supplied to the control connection of the second transistor, and the potential at a connecting electrode of the second transistor forming the second voltage signal, a first capacitor for frequency compensation, which is coupled between the output of the first stage and the output of the second stage, a feedback resistor, which is coupled between the first node and the output of the amplifier circuit, and a third transistor arranged between the first node and a first reference ground potential, the third transistor forming a current source.