Analog signal amplifier circuit using a differential pair of MOSFETs (insulated-gate field effect transistors) in an input stage

摘要

The present invention provides a limiter amplifier using a differential pair of MOS transistors in an input stage. A plurality of MOS transistors each having a drain and a gate connected to each other as a load transistor, are connected in series to the drains of the differential pair of MOS transistors in the input stage. MOS transistors are current-mirror-connected to the load transistors to perform feedback on the differential pair of MOS transistors in the input stage. The outputs of the differential pair of MOS transistors in the input stage are amplified by another differential pair of MOS transistors in an output stage.