Patent · US Active

Accurate scan-mode voltage detection circuit

US7609049B1 · kind B1 · utility

17Cited by

10References

13Claims

0Family size

Assignee

VIMICRO CORPORATION · CN

Inventors

Wenbo Tian · Longbeilingcun, CN
Hang Yin · Beijing, CN
Wang ZHAO · Longbeilingcun, CN

Key dates

Filing date	May 28, 2008
Grant date	Oct 27, 2009
Priority date	—
Expiry date	Jul 9, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01R19/16542
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A scan mode is used in a voltage detection circuit. An oscillator in the circuit is always on and a system including the voltage detection circuit detects various abnormal conditions, such as overcharging, overdischarging and overcurrent one by one for some clocks. To reduce the power consumption, the voltage detection circuit is turned on only once for several clocks. The on-time is very short and lasts about only one tenth of a clock cycle time. In other times, the voltage detection circuit is turned off to save power consumption.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.