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. 20, 1993
Filed:
Jul. 03, 1991
Applicant:
Inventor:
Kevin E Brehmer, San Jose, CA (US);
Assignee:
Exar Corporation, San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03K / ; H04B / ;
U.S. Cl.
CPC ...
307521 ; 328167 ; 307495 ;
Abstract
A programmable delay for the gate signal output of the differentiator in a data analyzing circuit is provided. A data signal is produced by a low pass filter, and a differentiator (high pass filter) produces a gate signal. The cutoff frequency of the low pass filter is controlled by a first control circuit, and a second control circuit is provided to separately control the cutoff frequency of the high pass filter. The second control circuit produces a variation from the base frequency determined by the first control circuit. Thus, the cutoff frequency of the high pass filter will always be proportional to that of the low pass filter.