Patent ID: 8643432

Claim:
A dual-channel switched-capacitor amplifier comprising: a first input; a second input; a first switched-capacitor network having a first sampling capacitor to sample the first input, and a first feedback capacitor to sample an output to generate a first sampled input; a first transconductance cell having a first differential transistor with a gate connected to the first sampled input generated by the first switched-capacitor network, the first transconductance cell also having a first tail transistor that generates a first tail current to the first differential transistor; a second switched-capacitor network having a second sampling capacitor to sample the second input, and a second feedback capacitor to sample the output to generate a second sampled input; a second transconductance cell having a second differential transistor with a gate connected to the second sampled input generated by the second switched-capacitor network, the second transconductance cell also having a second tail transistor that generates a second tail current to the second differential transistor; a first-stage trans-impedance cell for receiving a first-stage current and for generating coupling signals to a second stage; a second-stage trans-impedance cell for receiving a second-stage current and for receiving the coupling signals from the first-stage trans-impedance cell, the second-stage trans-impedance cell generating the output; and a transconductance swap network for connecting the first transconductance cell to the first-stage trans-impedance cell and for connecting the second transconductance cell to the second-stage trans-impedance cell during a direct connection, and for connecting the first transconductance cell to the second-stage trans-impedance cell and for connecting the second transconductance cell to the first-stage trans-impedance cell during a swap connection, whereby connections between transconductance and trans-impedance cells are swapped by the transconductance swap network.