FIXED DUTY CYCLE PULSE GENERATING CIRCUIT WITH ADJUSTABLE FREQUENCY
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2001-Nov-06
In some integrated circuit applications, a pulse generator is needed which provides an accurately controlled duty cycle and frequency. The circuit shown in Figure 1 utilizes an adjustable current reference, acurrent-controlled ring oscillator and a current-controlled pulse generator to provide a pulse train with a fixed and accurate duty cycle. The pulse frequency can be set to a desired value by adjusting the output of the current reference.