Title: Low-noise frequency fine-tuning
Application Number: 200610099600 Application Date: 2006.08.01
Publication Number: 1909361 Publication Date: 2007.02.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/08
Applicant(s) Name: Marvell World Trade Ltd. Address:
Inventor(s) Name: Greenberg Jody;Sutardja Sehat
Attorney & Agent: wang yi
Abstract:
    Circuits, methods and apparatus that provide low-noise and high-resolution electronic circuit tuning. An exemplary embodiment of the present invention adjusts a capacitance value by pulse-width modulating a control voltage for a switch in series with a capacitor. The pulse-width-modulated control signal can be adjusted using entry values found in a lookup table, by using analog or digital control signals, or by using other appropriate methods. The capacitance value tunes a frequency response or characteristic of an electronic circuit. The response can be made to be insensitive to conditions such as temperature, power supply voltage, or processing.
Time: 14