SU498716A1 - Indicator tuning resonant amplifier stage - Google Patents

Description

The "star" is formed as a result of the addition of the voltages Ud and U on this circuit.

Denoting the capacitors capacitance 4, 5, 6 by Cjj, Cj, and Ce, respectively, and having accepted that Cd,, Cs € 4, we have:

  Cr

about v- 4 C - g f J

C, + C, C, -

1 C,

5Z ... §) y,, p.

If you choose a capacity of € 4, Sd, 4 onCg at the same time that

C -i C G

Oj - | - Ur.i

then at 7vh2 e 0.

Therefore, the output voltage of the detector 7, connected to the common point of the star, can be used to manually or automatically adjust the amplifier, if we take the maximum achievable minimum output voltage of the detector 7, obtained by tuning the cascade resonant system, as a sign of the correct cascade setting.

Claims (1)

Invention Formula The tuning indicator of the resonant amplifier cascade, made in the form of an amplitude high-frequency voltage detector, characterized in that, to ensure the sensitivity of the indicator to the phase and to the tunable impedance module in the anode circuit of the cascade lamp, the detector is connected between the cathode of the lamp and the common connection point of two capacitors connected to the grid and the other to the lamp apode and having such a capacity that when tuned into the detector circuit, the high-frequency voltage is zero.