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:
Oct. 22, 1991
Filed:
Oct. 30, 1990
Applicant:
Inventors:
Robert D Lee, Denton, TX (US);
Robert W Mounger, Dallas, TX (US);
Assignee:
Dallas Semiconductor Corporation, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307520 ; 328167 ; 36472401 ; 307556 ; 307543 ; 307479 ;
Abstract
An integrated circuit filter wherein two digital inverters are used, with cutoff frequencies which bracket the desired passband frequency. (The cutoff frequency of the two digital inverters is selected by changing their RC time constants.) The inverter with the lower cutoff frequency has its output connected to the reset input of a counter, and the inverter with the higher cutoff-frequency has its output connected to the clock input of a counter.