Frequency-shift-keying detector using digital circuits

Details Frequency-shift-keying detector using digital circuits Frequency-shift-keying detector using digital circuits

H - Electricity

04

L

H04L 27/14 (2006.01) H04L 27/152 (2006.01)

Patent

CA 2150631

A signal modulated by frequency-shift keying is input to a detector consisting of an instantaneous phase detection circuit that detects the instantaneous phase of the input signal, a differentiating circuit that differentiates the instantaneous phase to obtain the instantaneous frequency, and a baseband processing circuit that recovers clock and data signals from the instantaneous frequency. To detect the instantaneous phase, the instantaneous phase detection circuit compares the logic levels of the input signal and a clock signal, and filters the resulting bit stream with a digital low-pass filter. The detector consists entirely of digital circuits that are well suited for large-scale integration.

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