Variable capacitor-controlled transistorized ultra-high frequenc

Details Variable capacitor-controlled transistorized ultra-high frequenc Variable capacitor-controlled transistorized ultra-high frequenc

1985-03-06

1986-06-24

Grimm, Siegfried H.

Oscillators

With outer casing or housing

331117FE, 331177V, H03B 512

Patent

active

045969663

ABSTRACT:
The invention relates to an ultra-high frequency oscillator operating in the X band. The oscillator circuit comprises a common gate-connected field effect transistor. The source connected tuning circuit comprises a variable capacitor of the varactor type controlled by a voltage and a choke in parallel. The control voltage is decoupled from earth by a capacitor. According to the invention, the transistor, the varactor and the capacitor are integrated into the same box or case in the form of a micromodule. The capacitor acts as a base for the transistor and the varactor, which are welded in juxtaposed manner. The length of the connection between the varactor and the source of the transistor has a minimum value, which makes it possible to broaden the linear frequency band as a function of the control voltage.

REFERENCES:
patent: 3421111 (1969-01-01), Boyajian
patent: 3775698 (1973-11-01), Nugent et al.
patent: 4485355 (1984-11-01), Scott

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