Method and apparatus for compensating deviation variances in a 2-level FSK FM transmitter
US7158603B2 · kind B2 · utility
3Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2002 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Mar 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/0941
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dual-port voltage control oscillator for use in a frequency synthesizer has first and second input ports and an output. The first port is coupled in a phase-locked-loop configuration for receiving input data and a reference frequency. The phase-locked-loop tunes the oscillator in response to a channel selection and trim parameter. The second port of the oscillator has a variable gain characteristic. A multiplier is coupled to the second port for multiplying the input data by a transfer function to alter the input data thereby compensating for the second port variable gain characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.