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:
Aug. 10, 1999
Filed:
Nov. 18, 1997
Kamran Iravani, San Jose, CA (US);
VLSI Technology, Inc., San Jose, CA (US);
Abstract
A CMOS super high speed voltage controlled oscillator (VCO) circuit that operates at frequencies of at least 3 GHz. The VCO circuit of the present invention includes a replica circuit, a first VCO cell coupled to the replica circuit, and a second VCO cell coupled to the first VCO cell and the replica circuit. A VCO output for transmitting a VCO output signal is also included. A first current source is coupled to the first VCO cell to transmit a first current from the power supply to the first VCO cell. A second current source is coupled to the second VCO cell to transmit a second current from the power supply to the second VCO cell. The first VCO cell and the second VCO cell each have respective first and second source follower load transistors coupled to the replica circuit. In addition, the first and second VCO cells, the first and second current sources, and the replica circuit are all fabricated using n-channel MOS transistors. Consequently, the VCO circuit of the present invention reliably oscillates at 3 GHz or above and produces a VCO output having a frequency of 3 GHz or above.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile