The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2000
Filed:
May. 05, 1998
Bar-Chung Hwang, Taoyuan, TW;
Jizoo Lin, Hsinchu, TW;
Gwo-Shu Chiou, Hsinchu Hsien, TW;
Yung-Chow Peng, Hsinchu Hsien, TW;
Winbond Electronics Corp., Hsinchu, TW;
Abstract
A circuit for monitoring battery voltages of a telephone terminal facility is disclosed. This circuit mainly includes a ringing detection circuit for generating a pulse signal in response to an off-hook signal or a ringing signal, a power detecting circuit for detecting battery voltages and a latch being in series connection with the power detecting circuit for outputting a signal showing a status of the detected battery voltages. The power detecting circuit and the latch are of an edge-triggered type and are activated only when a handset of a telephone is picked up or a ringing signal is received so that both the consumed power and the voltage variations are low.