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:
Feb. 20, 2007
Filed:
Oct. 11, 2001
James Shutt, Kent, WA (US);
Harold Kutz, Snoquolmie, WA (US);
James Shutt, Kent, WA (US);
Harold Kutz, Snoquolmie, WA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A frequency doubler circuit with trimmable current control. In one embodiment, the present invention provides a circuit comprising an oscillator with a current source and a frequency doubler circuit coupled to the current source. In one embodiment, the current source is for generating a reference current. In one embodiment, the frequency doubler circuit is operable to receive a first frequency signal for generating a second frequency signal and also receiving the reference current. The frequency doubler circuit, using the reference current, operates to compensate for process variation of capacitance of the frequency doubler circuit and uses the reference current to maintain a known duty cycle. In one embodiment, the circuit further comprises a control loop for generating an output current, wherein the output current, operating in conjunction with the reference current, operates to compensate for process variation of capacitance of the frequency doubler circuit and uses the reference current to maintain a known duty cycle. In one embodiment, the current source comprises a trimmable current control.