Patent ID: 7098713
Filing Date: 2006-08-29
Classification: H03K

Abstract:
1. A delay circuit comprising: a first switch connected between a first power supply and a first node, the first switch being switched according to an input signal; a second switch having a current path connected at a first end thereof to the first node, the second switch being switched according to the input signal; a third switch connected between a second end of the current path of the second switch and a second power supply, the third switch making a constant current flow according to a control signal formed of a constant current; a capacitor connected between the first node and the second power supply; and a differential amplifier supplied at a first input end thereof with a potential at the first node and supplied at a second input end thereof with a potential depending upon the control signal, the differential amplifier comparing the potential at the first node with the potential depending upon the control signal and outputting an output signal from an output terminal thereof.