Modulators – Amplitude modulator – Suppressed carrier double sideband type
Patent
1997-11-07
1999-10-26
Mis, David
Modulators
Amplitude modulator
Suppressed carrier double sideband type
332178, 455333, H03C 100, H03C 154
Patent
active
059735767
ABSTRACT:
A low-powered mixer that is operable at a low voltage by a single positive power supply. A predetermined voltage and a first data signal Ss1 superimposed on the predetermined voltage are input into the drain D of an FET Q1, while a first carrier signal Sc1 is input into the FET Q1's gate G. The FET Q1 thus generates a first mixed signal So1 by mixing the first data signal Ss1 and the first carrier signal Sc1. A predetermined voltage and a second data signal Ss2 superimposed on the predetermined voltage are input into the FET Q2's drain D, while a second carrier signal Sc2 is input into the FET Q2's gate G. The FET Q2 thus generates a second mixed signal So2 by mixing the second data signal Ss2 and the second carrier signal Sc2. A capacitor C5 causes the sources S of the FETs Q1 and Q2 to float for DC and to be grounded for AC.
REFERENCES:
patent: 4912520 (1990-03-01), Yamamoto et al.
patent: 5396659 (1995-03-01), Kimura
patent: 5686870 (1997-11-01), Ariie
German Office Action dated Jul. 24, 1996 and translation.
Mis David
Murata Manufacturing Co. Ltd.
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