Modulator and transmitter
US5016260A · kind A · utility
15Cited by
14References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/106
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modulator includes a plurality of piezoelectric resonators, a plurality of oscillator circuits, arranged in a one-to-one correspondence with the plurality of piezoelectric resonators, for generating different frequency signals in correspondence with corresponding piezoelectric resonators, and a switching circuit for selecting a predetermined frequency signal from the plurality of different frequency signals on the basis of a value of a digital signal to be modulated, and for outputting the selected frequency signal as a modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.