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:
Jul. 21, 1987
Filed:
Aug. 18, 1986
Applicant:
Inventor:
Frithjof von Sichart, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
3072 / ; 307443 ; 307473 ; 307451 ; 307360 ; 307585 ;
Abstract
A pull-up or pull-down resistor is connected between the CMOS circuit input and an operating potential source for defining the input potential of the unconnected circuit input and is formed by a MOS transistor circuit which is controlled from the circuit input and which is conductive between the threshold voltage of the MOS transistors of the one channel type and the threshold voltage of the MOS transistors of the other channel type. This MOS transistor circuit comprises two series-connected transistors which are controlled by two oppositely greatly asymmetrical CMOS inverters which have their inputs connected to the circuit input.