Monolithically integrable frequency demodulator device
US5903187A · kind A · utility
102Cited by
5References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/14
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Frequency modulated signals are demodulated through a limiter circuit that chops the signal to give pulses whose occurrence frequency is proportional to the instant frequency of the received signal. The invention is devoted to a new processing of those pulses. The leading edges of the pulses are time integrated. The obtained signal is then as usual, low pass filtered to give the demodulated signal. The main advantage of this new processing is that the circuit that makes this processing does not implement delay lines and can then be made as a single chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.