Automatic amplitude control for voltage controlled oscillator
US8134417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2010 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Sep 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit and method for calibrating a VCO (voltage controlled oscillator) is disclosed. In one embodiment, a circuit includes a VCO and a bias control circuit coupled to a tail node of the VCO. An amplitude control unit may also be coupled to the tail node, wherein the amplitude control unit is configured to determine the amplitude of a VCO output signal based on a voltage present on the tail node. The amplitude control unit may also be configured to generate a bias voltage based on the amplitude of the VCO output signal and a target voltage. The bias control circuit may be coupled to receive the bias voltage from the amplitude control unit and may be further configured to adjust the voltage on the tail node based on the received bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.