Method and apparatus for reducing the start time of a VCXO
US7009460B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Aug 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled oscillator, such as a VCXO (Voltage Controlled Crystal Oscillator), for generating a desired reference frequency in a wireless terminal with a reduced start-up time is described herein. According to the present invention, the VCXO comprises an oscillator that generates the desired reference frequency based on a variable voltage applied to the oscillator by a voltage controller. In addition, the VCXO includes a start-up controller that applies a bias voltage to an oscillator input node to reduce a capacitance associated with the oscillator, and therefore, to reduce the start-up time without negatively impacting the DC current consumption or the tuning range of the VCXO.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.