Voltage controlled oscillator open loop coarse amplitude control with respect to process and temperature variations
US8203393B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Mar 2, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/011
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled oscillator having a temperature and process controlled output. A VCO in accordance with the present invention comprises a reference current source, a fixed current source, coupled in series with the reference current source, the fixed current source comprising a temperature independent current source, a third current source, coupled in parallel with the combination of the reference current source and the fixed current source, and an oscillator, coupled in series with the third current source, wherein a current used to control the oscillator is based on operating temperatures and processes of the reference current source and the third current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.