Modulators – Amplitude modulator – Including discrete semiconductor device
Patent
1998-09-30
2000-07-11
Mis, David
Modulators
Amplitude modulator
Including discrete semiconductor device
332149, H03C 136, H03C 138, H03C 140
Patent
active
060879041
ABSTRACT:
The present invention provides a modulation circuit that has excellent modulation characteristics and can be designed as an MMIC. Consequently, this modulation circuit is such that the modulating wave input means is composed of a capacitor 21 and an inductor 22, the carrier input means is composed of a capacitor 23 and a resistance element 24, the self-bias means is composed of a resistance element 26 and a capacitor 27, the carrier selection means is composed of an inductor 22 and a capacitor 28, and the modulated wave output means is composed of a capacitor 28.
REFERENCES:
patent: 3484723 (1969-12-01), Rypkema
patent: 5680078 (1997-10-01), Ariie
Charles A. Liechti, "Performance of Dual-Gate GaAs Mesfet's as Gain-Controlled Law-Noise Amplifiers and High-Speed Modulators", IEEE Transactions on Microwave Theory and Techniques, pp. 461-468, Jun. 1973.
Practical Electronic Circuit Handbook I, 1997 CQ Shuppansha, Chapter 3: High Frequency Circuit, High Frequency Practical Circuit, pp. 228-229.
Mis David
OKI Electric Industry Co., Ltd.
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