Low cost digital FM modulator
US6587011B2 · kind B2 · utility
2Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Jun 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A modulator including a noise shaper receiving the input signal and providing a signal coded over one bit, a phase loop including an adder and a shift register. The adder receives the signal coded over one bit, the output of the shift register, and a constant. The input of the shift register receives the adder output. A sinusoidal shaper is coupled to the output of the shift register to provide a signal modulated in frequency by the input signal. The present invention also relates to a modulation chain including a modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.