Multi-grid electron tube high frequency power oscillator

Details Multi-grid electron tube high frequency power oscillator Multi-grid electron tube high frequency power oscillator

1989-08-15

1990-09-04

Grimm, Siegfried H.

Oscillators

L-c type oscillators

Anode to cathode coupled or connected resonant circuit

331173, 331183, 331185, H03B 102, H03B 510

Patent

active

049547925

ABSTRACT:
A high-frequency power oscillator includes a tetrode electron tube (5), a current source (3) and a voltage-limiting circuit (4). The current source (3) is connected to the screen grid of the tetrode (5). This limits the screen grid current when the voltage on the anode of the tetrode (5) is momentarily lower than the screen grid voltage. Between the screen grid and the cathode of the tetrode the voltage-limiting circuit (4) is inserted. This circuit starts to conduct above a predetermined threshold value. This forms a limit to the screen grid voltage so that is is possible to operate the tetrode (5) in a pulsating manner. The voltage-limiting circuit may comprise a triode (4) with a voltage source (2) providing a constant voltage between the grid and the cathode of the triode (4).

REFERENCES:
patent: 3331031 (1967-07-01), Nawracaj et al.
patent: 4761618 (1988-08-01), Patron et al.
patent: 4884043 (1989-11-01), Patron et al.
patent: 4897619 (1990-01-01), Patron et al.

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