OPERATIONAL AMPLIFIER WITH HIGH GAIN AND LOW DERIVATIVE FOR A SAMPLE-BLOCKING CIRCUIT

摘要

The invention relates to operational amplifiers. An operational amplifier 2 incorporated in a sample-and-hold circuit includes, in particular, load-carrying circuits using 225, 226 channel-channel field-effect transistors. CONNECTED BY A BALANCED POLARIZING AND LEVEL DIFFERENTIAL CIRCUIT 233-236) TO A DIFFERENTIAL AMPLIFIER STAGE WITH NPN TRANSISTORS 259, 260. SYMMETRIC COUPLING WITH ISOLATION BETWEEN EACH FIELD EFFECT TRANSISTOR AND THE OPPOSITE LEVEL DIFFERENTIAL CIRCUIT INCREASES AMPLIFY AND PROCURE LOW CONTINUOUS SHIFT VOLTAGE, AND HIGH VALUES OF INPUT, GAIN, AND BAND WIDTH. / P P APPLICATION TO ANALOG TO DIGITAL CONVERTERS. / P