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. 23, 1978
Filed:
Dec. 13, 1976
Applicant:
Inventors:
William Henry Giolma, Garland, TX (US);
Bernhard Hans Andresen, Dallas, TX (US);
Assignee:
Texas Instruments Incorporated, Dallax, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03B / ;
U.S. Cl.
CPC ...
331 / ; 331-8 ; 331 25 ; 331 34 ; 331 57 ; 3311 / ;
Abstract
A current controlled ring oscillator is utilized in a phase locked loop system. The ring itself is comprised of lateral pnp current sources and Schottky clamped npn transistors to provide a frequency range of 4 megahertz at 50 microamp drive to 43 megahertz at 1 milliamp drive. The frequency of the ring oscillator is varied by varying the current injected into the ring.