Patent ID: 6703883
Filing Date: 2004-03-09
Classification: G06F,H03K

Abstract:
A clock sensor, comprising:an input circuit configured to received an input signal; a biasing circuit, connected to the input circuit, that is configured to receive the input signal and to provide biasing voltages; and a switching circuit, connected to the biasing circuit, that is configured to receive the biasing voltages that keep the switching circuit in a near ON state; wherein the biasing circuit comprises: a first diode coupled between a first power supply node and a first terminal of a first resistor so as to conduct current between the first power supply node and the first resistor; a second diode coupled between a second terminal of the first resistor and a second power supply node so as to conduct current between the first resistor and the second power supply node; a second resistor having a first terminal coupled to the first diode, and having a second terminal coupled to a first terminal of the switching circuit; a third resistor having a first terminal coupled to the second diode, and having a second terminal coupled to a second terminal of the switching circuit.