Circuit for linearly amplifying and demodulating an AM-modulated

Details Circuit for linearly amplifying and demodulating an AM-modulated Circuit for linearly amplifying and demodulating an AM-modulated

1989-02-21

1990-11-20

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

307492, 307490, 330302, 330310, 328145, H04B 116, H03F 304

Patent

active

049725122

ABSTRACT:
Circuit arrangement for linearly amplifying and demodulating an AM-modulated signal, and integrated semiconductor element for said circuit arrangement. A linear amplifier and demodulator for AM-modulated signals comprises a logarithmic amplifier having a number of amplifier stages successively operating in a limiting mode, an antilog circuit, and DC separation between the logarithmic amplifier and the antilog circuit.

REFERENCES:
patent: 3605027 (1971-09-01), Nichols et al.
patent: 3757136 (1973-09-01), Hughes
patent: 4090150 (1977-01-01), Vachenauer
patent: 4385364 (1983-05-01), Main
patent: 4716316 (1987-12-01), Colin
William L. Barber et al., "A True Logarithmic Amplifier for Radar IF Applications", IEEE, Journal of Solid-State Circuits, vol. SC-15, No. 3, pp. 291-295.

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