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. 29, 1987
Filed:
Feb. 07, 1985
Adrianus T Van Zanten, Eindhoven, NL;
Hendrikus J Veendrick, Eindhoven, NL;
Leonardus C Pfennings, Eindhoven, NL;
Wilhelmus C Gubbels, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An integrated logic circuit includes a push-pull amplifier stage, in which by means of a bootstrap circuit the potential at the gate of the 'push' transistor is brought above the supply voltage so that the output voltage of the amplifier lies above the supply voltage minus the threshold voltage of the push transistor. In order to prevent the charge from leaking away after the bootstrap capacitance has been charged via an enhancement transistor, the enhancement transistor is cut off by means of the 'low' input signal. A second bootstrap circuit (between the input and the gate of the enhancement transistor) ensures that the first bootstrap capacitance is charged up to the full supply voltage because the latter gate electrode is lifted above the supply voltage by the second bootstrap.