An Integrated-Circuit Dual Timer

This paper describes a unique circuit called a dual timer. The circuit was designed to be versatile and universal in consumer electronics applications. The circuit can operate in monostable as well as astable mode. This circuit can be used not only in linear circuitry but in digital circuitry as well since it operates from 5 volts to 15 volts and its output is TTL compatible. Each timer is basically comprised of two comparators (one for trigger and one for threshold, refer to Figure 1) a flip flop and a totem-pole output stage.