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:
May. 20, 2003
Filed:
Aug. 11, 2000
Masanori Miyagi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A latch circuit is arranged by means for detecting a signal, a unit for holding a signal detection condition, and a unit for releasing the signal detection condition. When a detection output produced from the detecting unit is entered into the signal detection condition holding unit, the signal detection condition holding unit continuously holds the detection condition until a power supply is interrupted even when the detection output is not entered thereinto. The signal detection condition releasing unit produces a release signal only when the power supply is turned ON. Once the signal detection condition holding unit holds the signal detection condition, the signal detection condition holding unit is reset to an undetection condition only when the power supply is interrupted and then is again turned ON. The latch circuit can firmly reset the stopped system to the initial condition by merely again turning ON the power supply. In addition the stopped system is not unnecessarily reset until the power supply is interrupted. As a consequence, it is possible to obtain the safety operation as well as the firm operation of the circuit and the system.