JPS6423619A - Counter circuit - Google Patents

Abstract

PURPOSE:To obtain a further miniaturized counter circuit, by constituting the circuit by means of the combination of an n-stage dividing circuit and gate circuits which control the initializing state of the dividing circuit. CONSTITUTION:The titled circuit is provided with an n-stage dividing circuit 10 which is equipped with stages of a number equivalent to (n) and divides input pulses (1) in accordance with the number of the (n) and, at the same time, which is reset by a reset pulse (2), a 1st gate circuit 20 which outputs a prescribed value when the output (4) of a 2nd gate circuit 30 and the output of each stage of the circuit 10 become prescribed values and another value when the reset pulse (2) is inputted, and the 2nd gate circuit 30. By inputting the reset pulse (2), the n-stage dividing circuit 10 is set to the initialized state and, for example, the fall of 2n pieces of input pulses (1) is divided. Then the input pulses (1) are controlled by using the output of the 1st gate circuit 20 at the moment when the 2n-th input pulse (1) is inputted so that the further input of the input pulses (1) can be inhibited until the next reset pulse (2) is inputted. Therefore, a further miniaturized counter circuit can be realized.