Integrated frequency calibration architecture
US7804369B2 · kind B2 · utility
9Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2009 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Jan 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an exemplary embodiment, a free running VCO has two modes: a normal operating mode and a calibration mode. In the calibration mode, the free running VCO is phase lock looped with itself instead of a calibration VCO. Furthermore, in an exemplary embodiment, a tuning voltage for the free running VCO is adjusted to offset any tuning error. In addition, in various embodiments a reference crystal oscillator used in the phase lock loop is located on a DSP module instead of on the RF module. In yet another exemplary embodiment, the free running VCO is the only high frequency VCO on a radio frequency module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.