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:
Jul. 31, 2001
Filed:
Nov. 05, 1999
Applicant:
Inventors:
Kevin G. Faison, Owings Mills, MD (US);
Eric Naviasky, Ellicott City, MD (US);
Martin J. Mengele, Ellicott City, MD (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/32 ; H03B 5/36 ;
U.S. Cl.
CPC ...
H03B 5/32 ; H03B 5/36 ;
Abstract
A digitally tuned and linearized low voltage crystal oscillator integrated circuit requires only an oscillator crystal as external circuitry. The inventive circuit operates at voltages of 3.3V and below and requires no other off-chip components. A crystal oscillator, such as a Pierce crystal oscillator uses an inverting gain stage and a phase shift network composed of an array of switchable capacitors and the crystal. The design offers improvements in power consumption, area, manufacturability and cost.