Patent ID: 9716480
Date: 2017-07-25
CPC Classifications: H03F,H03G,H04B

Claim:
1. A method for controlling a gain of a trans-impedance amplifier, the trans-impedance amplifier amplifying an input signal to produce an output signal, the method comprising: receiving a first current input of the input signal at a first common node; coupling a first amplifier to the first common node, the first amplifier having a first voltage output; diverting a first portion of the first current input at the first common node away from the first amplifier to affect the first voltage output; receiving a second current input of the input signal at a second common node; coupling a second amplifier to the second common node, the second amplifier having a second voltage output; and diverting a second portion of the second current input at the second common node away from the second amplifier to affect the second voltage output, wherein at least one of, the first portion of the first current input, or the second portion of the second current input, is diverted by one or more replica gain control cells, and wherein the output signal of the trans-impedance amplifier is formed from the first voltage output and the second voltage output.