Demodulator for amplitude-modulated carrier frequency oscillatio

Details Demodulator for amplitude-modulated carrier frequency oscillatio Demodulator for amplitude-modulated carrier frequency oscillatio

1985-04-10

1986-12-02

LaRoche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329168, H03D 100

Patent

active

046267905

ABSTRACT:
Amplitude-modulated carrier frequency oscillations are supplied to the demodulator of the present invention whose peak value is maintained constant on its receiving side by a controller. The carrier frequency oscillations are supplied via a capacitor to the two inputs of a NOR gate. Both inputs of the NOR gate are connected via a resistor with the output thereof. The output of the NOR gate is connected with an inverter, at whose output the evaluated carrier frequency oscillations in the form of data are collected. Because the different elements of C-MOS circuits inherently exhibit different threshold values, the comparator functions required for demodulation can be realized at little expense using the gates of a C-MOS circuit.

REFERENCES:
patent: 4229668 (1980-10-01), Ebihara et al.
Electronic Design, vol. 25, "Reduce System Noise with C-MOS Circuits", Dec. 6, 1973, pp. 112-115, Schamis.

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