Voltage controlled oscillator with body of transistors bias control
US7382206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2006 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/1278
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a voltage controlled oscillator, a resonant circuit generates a resonant frequency in response to a tuning voltage. A differential oscillator includes first and second transistors differentially cross-coupled to the resonant circuit. The first and second transistors supply energy to the resonant circuit to oscillate the resonant frequency from the resonant circuit, thereby generating first and second oscillation signals having a phase difference of 180 degree. Also, the first and second transistors adjust the first and second oscillation signals to a uniform level in response to a body bias voltage. In addition, an output level detector detects a level of the first and second oscillation signals from the differential oscillator and supplies the body bias voltage corresponding to the detected level to a body of each of the first and second transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.