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:
Jan. 25, 1983
Filed:
Nov. 03, 1980
Applicant:
Inventor:
Thomas F Martin, Richardson, TX (US);
Assignee:
Rockwell International Corporation, El Segundo, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03J / ;
U.S. Cl.
CPC ...
331179 ; 3311 / ; 455186 ; 455195 ; 455199 ;
Abstract
A VCO (Voltage Controlled Oscillator) is provided with a full set of tuning voltages from a reduced number of reference voltage sources, such as potentiometers. Logic controlled switch means delivers any of the reference voltages individually or predetermined combinations thereof as the tuning voltages to the VCO. A reference voltage source potentiometer is provided for each of the odd numbered tuning voltages, and a piecewise linear approximation is provided for the intermediate even numbered tuning voltages by generating the average of two adjacent odd voltages.