Patent ID: 7061313

Claim:
A multistage amplifier comprising: an initial stage including a first input to receive an input signal, a second input to receive a combined feedback signal, and an output, and wherein the output of the initial stage provides an amplified signal responsive to the input signal; a final stage including a first input coupled to the output of the initial stage and an output to provide a final output signal of the multistage amplifier, and wherein the final output signal is an amplified signal responsive to the input signal; a first feedback loop coupling the output of the initial stage to the second input of the initial stage, and providing a first current-mode feedback signal to the second input of the initial stage, the first feedback loop comprising a high pass filter; a second feedback loop coupling the output of the final stage to the second input of the initial stage, and providing a second current-mode feedback signal to the second input of the initial stage, the second feedback loop comprising a low pass filter; and wherein the combined feedback signal is formed by combining the first and second current-mode feedback signals.