Voltage controlled oscillator with temperature and process compensation
US7463101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 2004 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Sep 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0995
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage control oscillator, outputting a clocking signal with a specific frequency according to an input voltage level, has a constant current source, a voltage/current converter, a current mirror and an oscillating circuit. The constant current source provides a predetermined reference current. The voltage/current converter is coupled to the constant current source, for determining a first current flowing through the voltage/current converter according to the input voltage. The current mirror has a first current terminal coupled to the constant current source, for determining a third current flowing through a second current terminal according to the second current flowing through the first current terminal, wherein the second current is the reference current subtracted by the first current. The oscillating circuit is coupled to the second current terminal of the current mirror, for determining a frequency of the clocking signal according to the third current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.