FSK demodulator slicer with fast automatic DC offset...

Details FSK demodulator slicer with fast automatic DC offset... FSK demodulator slicer with fast automatic DC offset...

2007-09-04

2007-09-04

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C329S300000

Reexamination Certificate

active

10397704

ABSTRACT:
A data slicer for an FSK demodulator employs a peak and valley detector, each of which has a discharge path with selectable decay rates. The faster decay rate for the peak and valley detector outputs is selected when the difference between the current peak and valley voltages exceeds a predetermined percentage of the expected swing of the voltage input and when a packet has not been detected. When a packet is detected, a slower decay rate is selected. In this mode, the faster decay rate permits faster acquisition of packet data in the presence of DC offset, as it permits the data slicer to converge on an appropriate switching point more quickly.

REFERENCES:
patent: 4270208 (1981-05-01), MacDavid
patent: 1148682 (2001-10-01), None

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