Patent ID: 6275686
Filing Date: 2001-08-14
Classification: H03D

Abstract:
A differential phase shift amplifier system comprising:a source of a sine wave carrier frequency;a source of a square wave beat frequency higher than said carrier frequency;a source of a physical or electrical quantity;a transducer receiving said carrier frequency and said physical or electrical quantity and using resistive or reactive circuit means to convert said physical or electrical quantity to differential phase angles of said carrier frequency at two outputs;two amplifiers receiving said two carrier frequency outputs and having two square wave outputs differing differentially in their phase angle;two digital mixers receiving said amplifier outputs and said high beat frequency and having low difference frequency products differing differentially in phase;two frequency doubler circuit chains multiplying said low frequency mixer products to the carrier frequency and thus multiplying said phase differential by the chain multiplication factor;two chains of digital mixers and frequency doubler circuits further multiplying said differential phase angle of said carrier frequency to a desired value of phase or frequency differential which is an amplified analog equivalent of said physical or electrical quantity.