FSK data receiving system
US5293408A · kind A · utility
32Cited by
0References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Sep 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/152
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A data receiving system comprising an I base-band signal and a Q base-band signal which are used in a quadrature demodulation operation. Zero-crossing points of respective base-band signals are detected and a control signal is generated in response to each zero-crossing point. A phase-shift switching circuit alternately selects either the I base-band signal or the Q base-band signal in response to the control signal to generate an I/Q base-band signal. And, a demodulation operation is executed on the basis of the I/Q signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.