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:
May. 16, 1978
Filed:
Feb. 08, 1972
Applicant:
Inventor:
Joseph A Webb, Lakewood, CO (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03D / ; H03D / ; H03D / ;
U.S. Cl.
CPC ...
329-1 ; 325324 ; 328109 ; 328135 ; 328140 ; 328151 ; 328166 ; 329 50 ; 329122 ; 329126 ; 329135 ; 329147 ;
Abstract
A quadrature analog-to-digital sampler, operating at a minimum sampling rate equal to the bandwidth of the input signal provides a pair of quadrature related digital signals which are input to first and second digital computers. The first computer calculates the instantaneous amplitude of the input signal and the second computer computes the instantaneous phase of the input signal. A third digital computer acts on the output of the second computer and differentiates the instantaneous phase of the signal with respect to time to provide frequency modulation output.