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:
Apr. 16, 2002
Filed:
Jul. 20, 2000
Hiep V. Tran, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit for improving the performance of a charging capacitor inverter used in VCO and similar circuits. The disclosed approach is used to provide both trip point and charging current delay control to reduce the amount of “jitter” associated with the circuit. Trip point delay control is accomplished by adding an in-line transistor, output in a typical charged capacitor inverter, between the charging capacitor and the circuit. The threshold of this transistor is controlled by a dc bias level (control voltage) which allows this transistor to turn “ON” or “OFF” when the node voltage of the capacitor reaches the controllable preset level. Further control of the circuit's delay is obtained by means of circuitry which allows the amount of capacitor charging current to be selected.