Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1985-10-22
1987-02-10
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
307525, 328133, 329122, 329126, 375 81, 375120, 455214, H03D 302, H03D 1300
Patent
active
046425748
ABSTRACT:
A digital quartz stabilized FM discriminator which is linear and temperature independent and frequency stable and includes a circuit having a phase comparator which receives an input signal and an input from a reversible divider (3) which produces the angular frequencies f.sub.u and f.sub.o of the discriminator. The reversible divider divides a quartz stabilized reference frequency signal under control of the output signal from the phase comparator. A discriminator output signal is obtained by passing the output signal of the phase comparator through a low pass filter.
REFERENCES:
patent: 3983498 (1976-09-01), Malek
patent: 4097812 (1978-06-01), Rzeszewski
patent: 4345211 (1982-08-01), Longworth
patent: 4373204 (1983-02-01), Brooks
Grimm Siegfried H.
Siemens Aktiengesellschaft
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