Patent ID: 7936214

Claim:
A method of cancelling third order distortion for ultra low power applications comprising: receiving a signal to be amplified; operating a first amplifier including at least one active electronic device in a sub-threshold region for amplifying the received signal, wherein the first amplifier possesses a positive third derivative of a transfer function of the first amplifier to generate a first amplified signal having in phase third order distortions; operating a second amplifier including at least one differential pair of active electronic devices in a sub-threshold region for amplifying the received signal, where the second amplifier is arranged in parallel to the first amplifier, and wherein the second amplifier possesses a negative third derivative of a transfer function of the second amplifier to generate a second amplified signal having in opposite phase third order distortions; combining the first and second amplified output signals resulting in cancellation of the third order distortions in the combined signal.