GATE-COUPLED FIELD-EFFECT TRANSISTOR PAIR AMPLIFIER

摘要

Gate-Coupled Field-Effect Transistor Pair Amplifier An enhancement mode and a depletion mode pair of N-channel MOS transistors have their drain-source conduction paths connected in series and provided with a bias current means. The gates are coupled together as an input node. In one embodiment their bulk regions are source-connected and the output is from the source of the enhancement mode device to obtain a source follower configuration amplifier. In a second embodiment, the output is taken from the drain of the depletion mode device to obtain a common source configuration amplifier. Two source follower pairs are disclosed connected in parallel to form a differential input voltage amplifier stage. A common source pair is disclosed in combination with an additional enhancement mode transistor to form a current mirror.