Electronic circuit, modulation method, information...

Details Electronic circuit, modulation method, information... Electronic circuit, modulation method, information...

2006-08-15

2006-08-15

Maung, Nay (Department: 2618)

Telecommunications

Transmitter

Amplitude modulation

C455S102000, C455S110000, C455S203000, C375S244000, C375S298000, C375S300000

Reexamination Certificate

active

07092682

ABSTRACT:
A shaped-wave application section inputs a first pulse signal corresponding to transmission data output from a transmission data output section, and applies, to a modulation and amplification section, a signal wave corresponding to a second pulse signal such that the waveform of the first pulse signal is shaped. The pulse signal applied to the base of the transistor of the modulation and amplification section is amplitude-modulated into an amplitude-modulated wave in which the amplitude-modulated portion is strengthened, in accordance with the signal wave corresponding to the second pulse signal applied to the emitter thereof. The amplitude-modulated wave is supplied to an antenna section including a resonance circuit via the collector thereof, and is transmitted as an electromagnetic wave from the antenna section.

REFERENCES:
patent: 3550040 (1970-12-01), Sinusas
patent: 4142162 (1979-02-01), Huntley
patent: 4292598 (1981-09-01), Yasumura
patent: 4293736 (1981-10-01), Ogita
patent: 4520328 (1985-05-01), Murakami et al.
patent: 5054116 (1991-10-01), Davidson
patent: 5079525 (1992-01-01), Ishikawa et al.
patent: 5172079 (1992-12-01), Shigenari
patent: 5239275 (1993-08-01), Leitch
patent: 6816016 (2004-11-01), Sander et al.
Patent Abstracts of Japan, JP 2002-217483, Aug. 2, 2002.

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