Demodulators – Pulse or interrupted continuous wave demodulator – Pulse width demodulator
Patent
1992-04-29
1993-12-21
Grimm, Siegfried H.
Demodulators
Pulse or interrupted continuous wave demodulator
Pulse width demodulator
329321, 329341, 375 80, 375 95, H03D 300
Patent
active
052724484
ABSTRACT:
A digital demodulator provides efficient demodulation of frequency modulated, pulse-width modulated, and other temporally modulated signals. Without employing an analog-to-digital converter, modulating signal information is extracted from a modulated signal as numerical information. For frequency demodulation, a high gain stage is applied to an incoming FM signal to produce a corresponding sequence of square waves. The period between zero-crossings of the square waves is accurately measured to within one clock pulse using a high-speed clock and at least one counter to produce a demodulated signal.
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Crego Charles R.
Hedstrom Mark D.
Porter Robert B.
Grimm Siegfried H.
NUMA Technologies, Inc.
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