Hysteresis comparator circuit consuming a small current

Details Hysteresis comparator circuit consuming a small current Hysteresis comparator circuit consuming a small current

1999-06-16

2000-12-19

Le, Dinh T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327131, 327 73, H03K 524

Patent

active

061631906

ABSTRACT:
A hysteresis comparator circuit and a waveform generating circuit reduce a power consumption of a DC/DC converter so as to improve a power consumption efficiency when the DC/DC converter is operated with a relatively small load. The hysteresis comparator circuit is connected to a reference voltage source providing a reference voltage. A hysteresis comparator compares an input voltage with one of a first threshold voltage and a second threshold voltage. A hysteresis voltage generating circuit selectively generates one of the first and second threshold voltages by controlling a state of electric charge stored in each of the capacitors. An electric charge stored in the capacitors is provided from the reference voltage source.

REFERENCES:
patent: 4602169 (1986-07-01), Shimuzu
patent: 5463333 (1995-10-01), Calder et al.

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