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:
Sep. 09, 1997
Filed:
Mar. 06, 1996
Applicant:
Inventor:
Luigi Penza, Vimercate, IT;
Assignee:
SGS-Thomson Microelectronics S.r.l., Agrate Brianza, IT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03L / ;
U.S. Cl.
CPC ...
331 34 ; 331 57 ; 331175 ;
Abstract
Each starved-inverter of a voltage controlled ring oscillator has an output transfer gate associated therewith. The pair of complementary switches composing a transfer gate being controlled in common with the relative current generators of the starved-inverter stage, by a frequency control voltage and by a voltage difference between a supply voltage and the control voltage, respectively. The frequency produced by the oscillator is linearly proportional to the control voltage and inversely proportional to the square root of the supply voltage, for an enhanced noise immunity and improved frequency stability.