Demodulator using digital circuitry
US6639459B1 · kind B1 · utility
8Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A demodulator converts a voltage input to an output voltage. The demodulator has a voltage-controlled oscillator (VCO), a counter, a holding apparatus, and a digital compare apparatus. The VCO generates a signal having a frequency proportional to the analog input voltage. The counter counts each cycle of the signal generated by the VCO and outputs a count signal representative of the cycle count. The holding apparatus holds the count signal and generates a held count signal. The digital compare apparatus compares the count signal and the held count signal and generates the digital output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.