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:
Dec. 21, 1993
Filed:
Aug. 03, 1992
Applicant:
Inventors:
Assignee:
Motorola Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03L / ;
U.S. Cl.
CPC ...
331 57 ; 331 17 ; 331 25 ; 331 34 ; 3311 / ; 3311 / ; 3311 / ; 331179 ;
Abstract
A method and apparatus for switching between gain curves of a switched gain voltage controlled oscillator (VCO) 52, 52' or 52'. In one form, the present invention uses a switched gain voltage controlled oscillator (VCO) 52, 52' or 52' which utilizes a ring oscillator. A Gain Control signal is used to select between using a high gain curve and using a low gain curve. The low gain curve is produced by selecting a high resistance path to either power or ground. The high gain curve is produced by selecting a low resistance path to either power or ground.