Comparator with latching function

Details Comparator with latching function Comparator with latching function

2009-02-26

2010-12-07

Tang, Minh N (Department: 2829)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C327S063000, C327S065000

Reexamination Certificate

active

07847576

ABSTRACT:
A comparison amplification unit compares a level of a signal in a positive line with that of a signal in a negative line and latches a comparison result. An input terminal of a first inverter is connected to the positive line and an output terminal thereof is connected to the negative line. An input terminal of a second inverter is connected to the negative line and an output terminal thereof is connected to the positive line. An activation switch selectively switches between a state where the activation switch outputs a power supply voltage to the other power supply terminals of the inverters that are connected in common, such that the comparison amplification unit is inactivated, and a state where the activation switch outputs the ground voltage such that the comparison amplification is activated. The comparator outputs a signal corresponding to at least one of the signal in the positive line and the signal in the negative line at a timing after the comparison amplification unit is activated.

REFERENCES:
patent: 4461965 (1984-07-01), Chin
patent: 4485317 (1984-11-01), Davies, Jr.
patent: 4558241 (1985-12-01), Suzuki et al.
patent: 4608670 (1986-08-01), Duvvury et al.
patent: 4641246 (1987-02-01), Halbert et al.
patent: 6211705 (2001-04-01), Bruccoleri et al.
patent: 6608503 (2003-08-01), Shenai et al.

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