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:
Apr. 12, 2011
Filed:
Jun. 04, 2008
Michiko Tokumaru, Osaka, JP;
Heiji Ikoma, Nara, JP;
Michiko Tokumaru, Osaka, JP;
Heiji Ikoma, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
When a semiconductor circuit, in which a stabilizing capacitorfor stabilizing a reference voltage Vbias is connected to a reference voltage terminal RT, recovers from a power down state to an operational state, a current mirror circuitprovides current mirroring of a current Ia of a first current path Ph, which generates an OFF threshold voltage refof a hysteresis comparator, to generate a current Ib of a second current path Ph, which generates the reference voltage Vbias. The reference voltage Vbias is input to the comparatoras an input voltage vin. When the reference voltage Vbias becomes equal to the OFF threshold voltage ref, the comparatorimmediately stops the charging of the stabilizing capacitorby a current source I