Integrated oscillator circuit with a memory based frequency control circuit and associated methods
US6271733A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Dec 13, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit includes an oscillator circuit for generating an output signal having a desired frequency. The oscillator circuit includes a capacitive device having a controllable capacitance value responsive to a control signal. A control circuit is connected to the oscillator circuit for controlling the capacitance value so that the oscillator circuit generates the output signal at the desired frequency. The control circuit includes a memory for storing a digital control word and a control signal generating circuit for converting the digital control word into the control signal for the capacitive device. Setting the desired frequency of the output signal is performed internal to the integrated circuit without requiring complex control circuitry for switching among various capacitors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.