A differential amplifier circuit, a voltage regulator using the differential amplifier circuit, and a method for controlling the differential amplifier circuit. The circuit includes a differential pair having a plurality of transistors, a first bias current generator circuit part to generate a first...http://www.google.com.hk/patents/US7598807?utm_source=gb-gplus-share專利 US7598807 - Differential amplifier circuit, voltage regulator using the differential amplifier circuit, and method for controlling the differential amplifier circuit
