SU4331A1 - Radio reception device - Google Patents

Description

The present invention is intended to receive wireless signals (telephony and telegraphy). Devices suitable for receiving wireless signals and operating with a negative impedance characteristic are already known. The device with a negative characteristic of resistance in this description is understood to be a device whose current circuit is composed in such a way that (at least for a certain area), as the voltage increases in the circuit, the current strength decreases and vice versa

those. for such a circuit, it is 0. In such a negative resistance circuit, the magnitude of this resistance can be measured by sequential (with that part of the circuit in which negative resistance occurs) by including controllable voltage and measuring the strengths of the currents corresponding to different voltages. An example of such a device with a negative resistance characteristic is the triode in the so-called dinatron compound.

Other examples of adaptation, scientific research institutes with a negative characteristic of resistance are: 1) devices, in which arc discharge occurs; 2) so. call “Calierotron Turner (described in“ Radio Review 1 p. 317 et seq.); 3) negatron (described in “Radio Review II p. 598 et seq.); 4 | devices described in English patent number 172320; 5) a device with a discharge tube having one incandescent cathode, one anode, one distribution grid, and located between the cathode and the distributor, the potential and the grid, which gives a positive potential with respect to the cathode, and both grids are connected in such a way that voltage fluctuations they are the same. In order to make all these devices suitable for receiving high frequency oscillations, they must be provided with rectification so that low frequency oscillations constituting a modulation of a high frequency carrier wave or resulting from interference can be heard on a telephone or similar apparatus. If the device operates with a discharge tube equipped with a distribution grid, the detector action can be obtained in the usual way using a grid capacitor with a dissipation resistance; in the case of an arc discharge, a rectifying action can be obtained if measures are taken so that only one of the two electrodes is heated up or that the discharge is performed asymmetrically at all.

The invention aims at such a connection system with a negative resistance characteristic and with rectification, in which, under the action of an electromotive force induced on it by a corresponding signal, both high and low-frequency vibrations are amplified to a greater extent than is possible. in existing connection systems. The part of the circuit in which negative resistance occurs is connected in series with a separate circuit closing this circuit, the impedance of which is generally a function of frequency, but which is designed so that for a single high frequency and for a wide range of very low frequencies, resistance in the circuit with negative resistance can be reduced to O or almost to 0. By a certain high frequency is meant the frequency of the carrier wave during telephone reception or the frequency of incoming his vibrations at telegraph reception. By a wide range of very low frequencies, we mean the range of audible and lower frequencies. Frequency impedance versus frequency may arise from the presence of an oscillation circuit tuned to a high frequency. By a separate circuit is meant a circuit that is not compatible with another circuit, either inductively or capacitively, or through ohmic resistance.

A circuit connected in series with a negative resistance can form an oscillation circuit that can be tuned to a high frequency and be made up of capacitances and self-induction connected in parallel, including, in series with this oscillation circuit, ohmic resistance, which can be made equal to or almost equal to the negative resistance and parallel to which is included the capacitor. The capacitor, together with the series-connected ohmic resistance, is further connected in parallel with the ohmic resistance, which can be made equal to or almost equal to the negative resistance, and both ohmic resistances are practically free from self-induction.

FIG. Figure 1-3 of the drawing shows schematically several exemplary forms of carrying out the proposed device. FIG. 1 shows a device with a circuit connected between the points I and Q, in series with negative resistance, which can be obtained in an arbitrary way. FIG. 2 shows a device applied to a discharge tube equipped with one glowing cathode, one anode, one distribution grid and one located between the cathode and a distribution grid, an auxiliary grid that gives a positive potential of 19 relative to the cathode. In a similar device, negative resistance appears in the circuit common to both gratings (next to each other, between the points / - and Q) 1 is measured by the discharge tube. The circuit, located between TOMKcJMi / and Q, produces at the same time that the total resistance. The effect of a circuit in which negative resistance occurs can be both for high frequency and for small hearing frequencies reduced to 0. The modulated oscillations received by antenna 31 are greatly amplified, therefore, not only where it concerns high frequency oscillations , but also for low frequencies arising due to the detector action of a lattice capacitor. Since the current in the anode circuit is practically changed to the same extent as the current in the auxiliary grid of the auxiliary grid 24, therefore, in the body 21 it will be heard significantly more low-frequency signals. The circuit arrangement located between the P and Q points is substantially consistent with the device shown in FIG. I (parts 27, 28, 29 and 30 are shown to be adjustable, and resistance 14 is absent).

In the device shown in FIG. 3, a negative resistance is assumed between points P and Q, just as it can, for example, occur with an arc discharge, which resistance can be, for example, equal to several ohms. In this case, the circuit contains a series-connected self-induction 37 and a tank 36, tuned to the expected high reception

frequency so that wL -g. For

This frequency from the apparent resistance (impedance) of self-induction 37 and the capacitance 36 remains only a small ohmic resistance, which almost always exists and which in FIG. 3 denoted by 32. Parallel con; the densator 36 has a resistivity to scattering 33, and a consistent soprotizleiiie menadu / I and Q is a bridge that consists of 1 and: 5 saccoinduction 34 having

a very large value for low frequency and resistance 35, which has approximately iy as i absolute; guy value as negative coherence. For a high frequency oscillator circuit 3-4,: 35, which is connected in parallel with j negative resistance, I can be ignored in BhtHMaHHe,

and the total resistance in the circuit can be made by appropriately choosing the resistance 33 to 0. For low-frequency oscillations, the total resistance in the circuit is. ji h L.ss

close to Hz3 + -; --35 Sirp

where / 33 is much larger than a ,, the absolute value of the negative resistance. In this case, the total resistance can be reduced to O, matters g,., Are somewhat smaller than g ,. FIG. 3 still shows the voltage source 38, a telephone with a blocking capacitor 39, and a coil 40 connected to the antenna. The oscillations in the antenna circuits are transmitted by the coil 40 to the roller 37.

The subject of the patent.

A device for radio reception using negative resistance, characterized in that in order to half the total resistance of the circuit, consisting of negative and positive resistance, approaching zero for a certain high frequency and some low frequency region, are connected in series with negative resistance PQ: a) vibrational circuit (10, II in Fig. 1 or 28, 27 in Fig. 2 or 36, 37 in Fig. 3), tuned to the received high frequency; b) ohmic resistance (12 in Fig. 1 or 29 in ka in Fig. 2 or 33 in Fig. 3), which is almost equal in absolute value to the negative resistance shunted by a capacitor (13, 30, 36 respectively. in Fig. 1, 2, 3i In series with which another ohmic resistance can be connected (14 in FIG. 1).