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. 06, 1997
Filed:
Apr. 02, 1996
Peng Yung-Chow, Hsinchu, TW;
Jizoo Lin, Hsinchu, TW;
Winbond Electronics Corp., Hsinchu, TW;
Abstract
A regulated charge pump is provided to boost an amount of voltage while minimizing the well voltage fluctuation during the operation. The charge pump includes a charge pump core which has a first transistor, a second, a third transistor and an integration circuit. The first transistor has a first current electrode for receiving the first power supply voltage and a second current electrode coupled to the first terminal of the charging capacitor. The second transistor has a first current electrode coupled to a second terminal of the charging capacitor, a control electrode and a second electrode for receiving a second power supply voltage. The second transistor is proportionately conductive during the first predetermined time period. The third transistor has a first current electrode for receiving the first power supply voltage, and a second current electrode coupled to the second terminal of the charging capacitor. The third transistor is conductive during the second predetermined time period. The integration circuit is coupled to the control electrode of the second transistor, for changing the second voltage proportionately in response to an integration of a difference between a proportional voltage and a reference voltage by altering a conductivity of the second transistor.