CCD Demodulator circuit

Details CCD Demodulator circuit CCD Demodulator circuit

1982-12-10

1984-11-20

Laroche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329107, 329109, 329119, 329135, 375 80, 375 94, 455214, H03D 318, H03D 500, H03K 522

Patent

active

044841434

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: 4253067 (1981-02-01), Caples et al.
patent: 4292593 (1981-09-01), de Jager et al.
patent: 4412181 (1983-10-01), Marguinaud et al.

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