SU43380A1 - Tube generator - Google Patents

Description

The present invention relates to lamp generators, in which in the anode circuit of an electron tube there are consecutive self-induction and a capacitor with a resistance connected in parallel with it.

The generation of oscillations, which is performed using a cathode lamp with a control grid, occurs, as is well known, so that the phases of the voltages on the grid and on the anode are mutually opposite. According to the invention, the feedback in the said generator is carried out aperiodically through elements that do not have a natural frequency, or the latter is significantly different from the frequency of the series of elements connected in series.

In FIG. 1, 2, 3, 4, and 5 depict generator shapes.

In the anode circuit of the generator lamp (Fig. 1), series-connected self-induction L and capacitance C are placed and, parallel to them, resistance K is of the same magnitude as self-induction resistance. Thus, a generating system is obtained, the oscillation amplitude in which can be maintained,

if a current passes through the lamp with the phase shifted by 180 with respect to the voltage received from the oscillating current at R. This phase is obtained by connecting one branch from the resistance / and self-induction L to the self-induction, and L is placed in the grid circuit of the lamp; need to choose) Z ,, uL. Here, there is a difficulty in that lamps with a very steep characteristic are required, which can be eliminated if instead of the resistance / switching on of the amplifier lamp according to the circuit in FIG. 2. Due to the fact that the amplifying lamp will reverse the phase, L and C should be mutually displaced. The internal resistance of the amplifying lamp can be made larger with the help of the screen grid with respect to uZ, or a transformer can be used instead of Z. It is also possible to make a generator with two electron tubes (Fig. 3), of which each has self-induction and capacitance in series in the anode circuit.

In the grid circuit of one lamp there is a part of a chain of series-connected elements that make up the complete circuit of another lamp. As a series circuit takes low energy from the lamp, the generator is especially suitable for frequency stabilization. A load circuit is included in the anode circuit of a single lamp, which, when tuned to the frequency of a series circuit, draws energy from the lamp. Since the load circuit cannot change the anode current in amplitude or phase, the frequency is determined solely by the series circuit. The ego is achieved by using a screen grid, which is grounded through a small resistance in order to pass through / complete the out-of-phase emission current of the lamp (Fig. 4).

A generator circuit is possible in which a piezo-crystal K is inserted into a series circuit Z, C (Fig. 5). The frequency is then determined by the frequency of the series circuit (L -} - L, C-f-C), where LI and C denote self-induction and the equivalent capacitance of its circuit, to its quartz. If the circuit generates when the crystal is turned on and if it is short-circuited, the frequency is determined, which is determined by L and C. If you change / or C, then the generator can be set to the original frequency of quartz and when the crystal is switched on again, C is a frequency that is completely independent of the lamp generator data, but only on the degree of quartz temperature maintenance. The found L or C setting can also be noted by changing L or C to obtain a change in the frequency around the short-circuit frequency in small amounts, if necessary.

If a crystal is included in each of the two anode circuits of the circuit according to FIG. 3, then it is possible to get oscillations when they have a common frequency. If both of these crystals have different temperature coefficients with respect to frequency, then it is possible by changing the resistances of R. and changing the temperature coefficient of the generator within the limits determined by the temperature coefficients of the crystals. If the temperature coefficients of the crystals have opposite signs, then the general temperature coefficient can be reduced to zero. With the help of a thermostat, both quartz can be maintained almost in resonance. Dry, naturally, that the same temperature is maintained on both crystals. However, small temperature changes have no effect. This idea can be dried out, using quartz of various types of polishing. The temperature required to maintain the oscillations can be automatically set by changing the anode current of the generator when the piezocrystals are tuned to resonance by changing the temperature. It is clear that both forms of embodiment shown in the diagrams of FIG. 4 and 5 can be united by the fact that to the part of the series circuit L, C in FIG. 4, a piezo crystal is added.

The subject of the patent.

Claims (9)

1. A tube generator, in which in the anode circuit of an electron tube there are series-connected self-induction and a capacitor with a resistance connected in parallel with it, characterized in that the feedback in the phase necessary for generation is carried out by aperiodic coupling through elements that do not have their own whose frequencies or frequencies are significantly different from the frequency of the series of elements connected in series. 2. The form of the generator according to claim 1, wherein the feedback consists of active resistance and impedance, connected in series, the communication impedance located in the grid circuit of the lamp. 3. The form of the generator on the PP. 1 and 2, characterized in that an amplifying lamp is used as the resistance of the connection, with an impedance of the anode circuit being included in the grid circuit of this lamp. 4. The form of the generator according to claim 1, the different use of two electron tubes, each of which has a series-connected self-induction in the circuit and a capacitance with parallel resistance and in the grid circuit of the series-connected elements, which is located in the anode circuit of the second lamp. 5. The form of the generator on the PP. 1-3, characterized by the use of a shielded lamp, in which a load circuit is connected between the anode and the screen grid, and the elements of the connection are connected between the screen grid and the cathode. 6. When the generator on the PP. 1-3 inclusion sequentially with sequentially - 3 - included self-induction and piezo-crystal capacitance. 7. When the generator according to claim 4 is connected in series with one or both successive chains of piezo-quartz. 8. When the generator on the PP. 4 and 7, the use of two piezo-crystals with different temperature coefficients, in particular with opposite signs. 9. When the generator on the PP. 4, 7 and 8 apply parallel resistance, which makes the frequency of the generator independent of temperature and regulates feedback.