Demodulator of angle modulated signal operable by low power volt

Details Demodulator of angle modulated signal operable by low power volt Demodulator of angle modulated signal operable by low power volt

1980-08-27

1982-07-13

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329137, 329140, 329145, 455214, H03D 322

Patent

active

043397263

ABSTRACT:
A demodulator for an angle modulated signal consists of circuitry particularly adaptable to integrated circuit construction. The various circuit functional groups are adapted to be connected in parallel, rather than serially, across the power source, thereby enabling good performance in systems having low voltage power sources. The angle modulated signal is converted into first and second signals of opposite phase. Also, the angle modulated signal is phase shifted an amount dependent upon the frequency deviation from a center frequency, the first and phase shifted signals are applied to a first OR circuit which provides the largest input signal as its output. The second and phase shifted signals are applied to a second OR circuit which provides the largest input signal as its output. The two OR circuit outputs are low-pass filtered and subtracted to provide the demodulated output.

REFERENCES:
patent: 3586986 (1971-06-01), Martens et al.
patent: 4119919 (1978-10-01), Sugawara

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