Patent ID: 7304536

Claim:
A nested transimpedance amplifier (TIA) circuit, comprising: a zero-order TIA having an input and an output; a first operational amplifier (opamp) having an input that communicates with said output of said zero-order TIA and an output; a first feedback resistance having one end that communicates with said input of said zero-order TIA and an opposite end that communicates with said output of said first opamp; a second feedback resistance having a first end that communicates with said input of said first opamp and an opposite end that communicates with said output of said first op-amp; a first feedback capacitance having a first end that communicates with said input of said zero-order TIA and a second end that communicates with said output of said zero-order TIA, wherein said zero order TIA includes: a second opamp having an input and an output; a third opamp having an input that communicates with said output of said second opamp and an output; and a first resistance having one end that communicates with said input of said third opamp and an opposite end that communicates with said output of said third opamp.