A DC offset compensation circuit (34) for compensating for a DC offset voltage of a signal amplifier (24) includes a first sample and hold circuit (40) having an input receiving an amplifier output signal (VOUT2) and an output supplying the sampled and held output signal (VOUT2) to a non-inverting input...http://www.google.com/patents/US6194941?utm_source=gb-gplus-sharePatent US6194941 - DC offset compensation circuit for a signal amplifier
