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. 09, 1996
Filed:
Feb. 25, 1994
Kiyofumi Sakurai, Yokohama, JP;
Tohru Furuyama, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A bias voltage generation circuit has a bias voltage generation means and a VBB detector. The bias voltage generation means is made up of a charge pump circuit, and a ring oscillator for biasing a P-type region to have a predetermined potential level. The VBB detector detects the bias level of the P-type region and controls the bias generation means. The VBB detector incorporates a bias level detection circuit, and two delay circuits which are controlled on the basis of a signal appearing at an output node N2 of the bias level detection circuit. The ring oscillator is controlled on the basis of outputs of the two delay circuits. One of the two delay circuits has a higher detection level and is therefore less responsive to the signal at the output node N2 than the other delay circuit, but provides a shorter delay time than that provided by the other delay circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile