Voltage threshold detection circuit with very low power consumpt

Details Voltage threshold detection circuit with very low power consumpt Voltage threshold detection circuit with very low power consumpt

1993-04-27

1995-08-08

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327143, 377 60, G05F 100

Patent

active

054402638

ABSTRACT:
A supply-voltage-monitoring circuit, for low-power integrated circuits, in which charge-sharing through a switched-capacitor chain is used to couple the supply voltage to a dynamic sensing node. The dynamic sensing node drives a half-latch, which is stable in a no-alarm condition. In this circuit, the state of the output gets switched over in the first phase if the voltage at the terminals of the capacitor at the start of this stage (this voltage being equal to a fraction of the input voltage) crosses a determined threshold. This threshold is determined as a function of technical parameters for the construction of the circuit. These technical parameters are chiefly the threshold voltage of the transistor and the characteristics of the transistors that form the locking circuit.

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