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. 04, 1980
Filed:
Jun. 29, 1977
Applicant:
Inventors:
James J Tomczak, Burlington, VT (US);
Richard N Wilson, Essex Junction, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H01L / ;
U.S. Cl.
CPC ...
307303 ; 307320 ; 307215 ; 307270 ; 357 14 ;
Abstract
An integrated circuit junction capacitor is formed using conventional bipolar transistor technology. Voltage variable capacitance is provided by a reverse biased emitter-base junction and parasitic collector-base capacitance is isolated from the emitter-base capacitance by maintaining the base-collector junction in a reverse biased condition. A bootstrapped driver circuit is also described in which bootstrap current is provided by a transistor-like structure in which an internal load capacitance enables circuit performance to remain substantially constant under various driven load conditions.