Patent ID: 6864751
Filing Date: 2005-03-08
Classification: H03F

Abstract:
1. A transimpedance amplifier circuit with limited output voltage and wide input-current dynamic-range comprising: a. an first transistor, with an input current signal connected to a control terminal and a second and third terminal; b. a second transistor with a control terminal connected to the second terminal of the first transistor providing an output voltage at a second terminal, and a third terminal of said second transistor being connected to a positive supply voltage, c. a resistor connected between the second terminal of the second transistor and the control terminal of the first transistor providing a voltage controlled current feedback from the amplifier output to its input, and d. a shunt circuit in parallel to the feedback resistor comprising a third and a fourth transistor each having an control terminal, with a second terminal of both third and fourth transistor connected to the second terminal of the second transistor and the third terminal of both third and forth transistor connected to the control terminal of the first transistor.