Patent ID: 7583904

Claim:
A burst-mode transimpedance amplifier (TIA) circuit, comprising: a TIA stage; a limiter-amplifier having a first input coupled to said TIA stage, a second input coupled to a direct current (DC) restoration loon and two differential outputs coupled to said direct current (DC) restoration loop, wherein said differential outputs are also outputs of said burst-mode TIA circuit; and a DC restoration loop coupled between the differential outputs and the second input of said limiter-amplifier and being configured to perform DC cancellation within variable acquisition periods, wherein the DC cancellation ensures substantially zero DC potential difference between said differential outputs; wherein said DC restoration loop comprises: an integrator having inverting and non-inverting inputs coupled to said differential outputs and an output port; a resistor coupled to the output port of said integrator; a switch switchably coupled across said resistor; and a capacitor having a first end coupled to a common junction of said switch and said resistor and having a second end connected to ground.