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. 07, 1999
Filed:
Dec. 19, 1997
Patrick R Smith, Garland, TX (US);
Kevin M Ovens, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An integrated circuit (100) includes an analog phase-locked loop circuit (10) and other circuitry (102). The analog phase-locked loop circuit includes a phase detector circuit (16) which compares the phase of a reference signal (28) to the output (12) of the phase-locked loop circuit, a charge pump circuit (18) responsive to the phase detector for varying the charge on a capacitor (36) of a loop filter circuit (20), a regulator circuit (22) which receives two separate control voltages (38, 44) from the loop filter circuit, and a voltage controlled oscillator circuit (24) which receives from the regulator circuit two separate control voltages (VIN, VREG), one of which also serves as a regulated supply voltage. The regulator circuit includes n-channel devices which are connected in series between a supply voltage and each control voltage output.