Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1986-03-14
1987-04-21
Grimm, Siegfried H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
331117D, 331177V, 331179, 332 30V, 455 87, 455111, 455113, H03B 518, H03C 322
Patent
active
046600027
ABSTRACT:
A high frequency oscillator having an oscillation transistor connected to a resonant strip line unit consisting of a main strip line member and an auxiliary strip line member. The auxiliary strip line member is connected in parallel with or isolated from the main strip line member by a switch diode for switching the characteristic impedance of the strip line unit so as to generate a reception or transmission carrier wave output. A varactor diode connected to the strip line unit has its capacitance changed through an applied control voltage for channel switching. A modulating signal input terminal is directly connected to a portion of the auxiliary strip line member for modulating an FM transmission signal independently of the value of the control voltage applied to the varactor diode.
REFERENCES:
patent: 4140982 (1979-02-01), Alexander
patent: 4353038 (1982-10-01), Rose et al.
patent: 4375621 (1983-03-01), Schneiter et al.
Iijima Kouta
Tanemura Takeshi
Alps Electric Co. ,Ltd.
Grimm Siegfried H.
Shoup Guy W.
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