Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1982-05-17
1983-06-21
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
329110, 329135, 329 50, 357 24, 455214, H03D 100, H03D 318
Patent
active
043896154
ABSTRACT:
A semiconductor integrated circuit using charged coupled device (CCD) technology for performing demodulation of time-varying signals which have been phase or amplitude modulated. The CCD circuit performs a sampling of the time-varying signal at a suitable sampling frequency depending upon the frequency of the phase or amplitude modulation of the carrier. The CCD device converts the sample into an equivalent charge packet which is used to control the control electrode of a field effect transistor in an amplifier circuit. The magnitude of the sample is representative of the amplitude of the carrier so that the output of the field effect transistor represents a demodulated signal. The circuit is a broad spectrum device, operable with a signal frequency from the audio into the gigaHertz (GHz) frequency range.
REFERENCES:
patent: 3781574 (1973-12-01), White et al.
patent: 3961275 (1976-06-01), Kochsmeier
patent: 3986198 (1976-10-01), Kosonocky
patent: 4010484 (1977-03-01), Mohsen
patent: 4032952 (1977-06-01), Ohba et al.
patent: 4051469 (1977-09-01), Ninomiya
patent: 4139784 (1979-02-01), Sauer
patent: 4158209 (1979-06-01), Levine
Electronics Letters, vol. 15, No. 16, Aug. 1979, F. G. A. Coupe, "Digital Frequency Discriminator", pp. 489 to 490.
French Barry T.
McNutt Michael J.
Grimm Siegfried H.
Hamann H. Fredrick
McGlynn Daniel R.
Rockwell International Corporation
Westin Edward P.
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