Astable MOS FET multivibrator

Abstract

A Schmitt trigger astable multivibrator circuit includes a first inverter, a second inverter whose input terminal is connected to the output terminal of the first inverter, a third inverter which is constituted by a first P-channel transistor and a first N-channel transistor serially connected and whose input and output terminals are respectively connected to the output and input terminals of the second inverter. The Schmitt trigger astable multivibrator circuit further includes a second P-channel transistor connected between a positive power supply terminal and the first P-channel transistor, and a second N-channel transistor connected between a ground terminal and the first N-channel transistor, and an input signal supplied to the first inverter is also applied to the gates of the second P-channel and N-channel transistors. The astable multivibrator also includes a time constant circuit, activated in response to the second inverter's output, which connects to the first inverter's input.

Dependencies are inferred from the claim text.