Sample and hold circuit and finite impulse response filter constructed therefrom

摘要

A high speed sample and hold circuit comprises an amplifier for producing an output current which is a linear function of an input voltage. A capacitor is responsive to the output current for producing an output voltage representative of the integral of the output current over a predetermined period of time. A switch selectively connects the amplifier to the capacitor during the predetermined period of time. A circuit for discharging the capacitor is also provided. A circuit for producing clock pulses controls the operation of the switch and the discharge circuit. A finite impulse response filter may be constructed around the sample and hold circuit.