Patent ID: 7064594
Filing Date: 2006-06-20
Classification: H03K

Abstract:
1. A pass gate circuit comprising: a pass gate unit, which delays an input signal for a fixed duration and outputs the delayed input signal as an output signal in response to a switching control signal; and a pass gate control unit that outputs the switching control signal, wherein, in response to a first internal control signal, the pass gate control unit determines the existence of a transition in the input signal, and enables or disables the switching control signal according to the determination; wherein the pass gate unit comprises: a first delay circuit, which receives the input signal, delays it for a first fixed duration, and outputs the delayed input signal as an internal signal; a switching circuit, which turns on when the switching control signal is enabled and turns off when the switching control signal is disabled, and receives and outputs the internal signal when turned on; a second delay circuit, which receives the internal signal, delays it for a second fixed duration, and outputs the delayed internal signal as an output signal; and a latch circuit, which maintains the level of the internal signal at a predetermined level and is connected between the switching circuit and the second delay circuit.