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:
Mar. 29, 1988
Filed:
Apr. 30, 1985
Frank J Bohac, Jr, Laguna Hills, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A voltage multiplier circuit is disclosed. The circuit comprises three p-channel MOS transistors and three capacitors. When these elements are connected to properly phased transfer and pump clock signals of positive polarity, the circuit generates a negative output voltage which is roughly equal in magnitude to the peak-to-peak voltage of the pump clock. One of the transistors couples the output node to the circuit input node, and is clocked by the transfer clock so as to isolate the input node from the output node when the output node potential is lower than the input node potential. Several of the circuits may be cascaded to produce a large negative supply from a small positive supply. The circuit is advantageously employed to provide the programming signal supply for EEPROM devices.