CMOS amplifier circuit and CCD delay line with CMOS amplifier

摘要

A CCD amplifier circuit including an active load type source- grounded inverting amplifier circuit which includes a driving MOS transistor, an active load MOS transistor connected to the driving MOS transistor, and a control circuit. The control circuit controls the voltage at the gate electrode of the active load MOS transistor with a control signal of low output impedance which is substantially inversely proportional to the drain-source voltage of the active load MOS transistor and level-shifted by a predetermined voltage. Further, a CCD delay line includes a floating diffusion region of predetermined impurities formed at an end of a charge- coupled device with a gate section having a predetermined fixed gate voltage, and a switched capacitor integrator for detecting the injection charge of the floating diffusion region to detect signal charges transferred to the floating diffusion region from the charge-coupled device. The CCD amplifier circuit is employed as an output circuit of the switched capacitor integrator.