ASK modulation circuit
US6504880B1 · kind B1 · utility
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10References
12Claims
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Assignee
Inventors
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An Amplitude Shift Keying (ASK) modulating circuit includes an oscillation circuit generating a pulse oscillation having a given frequency. A frequency divider is provided having a binary counter unit and having at least an input terminal, an output terminal and a reset terminal. The frequency divider is active and inactive when the reset terminal thereof is applied with low and high levels of a transmission signal wave, respectively, and divides the pulse oscillation while the frequency divider is active. The transmission signal wave is modulated together with a carrier frequency which is identical to the divided frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.