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:
Sep. 09, 2003
Filed:
Jul. 03, 2001
Ulrich Kaiser, Warstein, DE;
Ralph Oberhuber, Kumhausen, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit assembly for doubling the voltage of a battery includes a charge pump ( ) fed by the battery voltage and controlled by a clock generator ( ). The supply voltage of the clock generator is the voltage output by the charge pump ( ). The source/drain circuit of a field-effect transistor (P ) is inserted in the connection between the output of the charge pump ( ) and the battery ( ), the field-effect transistor (P ) being ON when its gate voltage is smaller than its source voltage. Connected to the gate of the field-effect transistor (P ) is the output circuit branch (N ) of a current mirror circuit ( ) through which a limited small current is derivable from the gate to ground. An auxiliary charge pump ( ) is provided which receives its supply voltage from the output of the charge pump ( ) and which is likewise controlled by the clock generator ( ). The voltage generated by the auxiliary charge pump ( ) is placed on the gate of the field-effect transistor (P ) to switch it OFF.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile