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. 28, 1987
Filed:
Jun. 06, 1986
Applicant:
Inventor:
Rupin J Javeri, Elk Grove, IL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
328133 ; 307525 ;
Abstract
A method and apparatus are disclosed for electronically processing a variable frequency input signal and a reference input signal to develop an output signal representative of the frequency difference between the two input signals. The state of the variable frequency signal is sampled upon the occurrence of each leading edge of the reference signal to produce a first output signal. The state of the variable frequency signal is also sampled upon the occurrence of each trailing edge of the reference signal to produce a second output signal. The two output signals are preferably ORed to develop the final output signal.