Low-power supply voltage level detection circuit and method

Details Low-power supply voltage level detection circuit and method Low-power supply voltage level detection circuit and method

2007-09-18

2007-09-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S079000, C327S143000, C320S136000

Reexamination Certificate

active

11169012

ABSTRACT:
An input power supply voltage level detection circuit and method are presented. The circuit includes a main detector core and a two-inverter buffer block that can include a first inverter and a second inverter. The circuit receives a voltage input signal and outputs a voltage output signal that is substantially equal to either the voltage input signal or ground, depending on whether the voltage input signal has reached a threshold voltage. The threshold voltage is defined by component characteristics of the main detector core and the two-inverter buffer block. The circuit can receive a hysteresis input signal, tied to the voltage input signal or the ground, that allows the threshold voltage to have a first threshold value when the voltage input signal increases and a second threshold value when the voltage input signal decreases. A power down input signal can also be received that allows the circuit to be powered down.

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