SU24017A1 - Radio reception device - Google Patents

Description

The invention relates to radio receivers, in which glow-discharge lamps are used.

The Zehnder, Boltzmann and others schemes, in which glow-discharge lamps were first used, were intended to experimentally prove the existence of electromagnetic waves in atmospheric space; for radio reception, in the modern meaning of this word, these circuits are unsuitable, since for their activation it is necessary to have high frequency electromotive oscillations of such magnitude that they exceed the ionization voltage of the lamps used in these circuits.

The subject of the invention is a device using a glow discharge lamp for receiving radio signals with small amplitudes of high-frequency emf.

According to the invention, a glow-discharge lamp is included in a circuit of a local low-frequency current source and a circuit of received high-frequency signals connected in series with one another.

In FIG. 1 depicts the scheme of the proposed device; FIG. 2 - diagram of the currents in the lamp.

The device consists of a neon lamp B, potentiometer A, to which

the low-frequency emf changes according to the law EI E "Sin tof, where EH is the amplitude of the EMF, co-angular frequency, B-circuit B, through which the EMF of high-frequency oscillations is supplied to the device and is changed, for example, by the law EZ Е, Sin Q t, whereE “is the amplitude of the emf pallets, and Q is their angular frequency.

Radio reception occurs as follows.

A low-frequency emf of a local source is applied to a neon lamp B using a potentiometer A. A high-frequency emf is supplied at this time. received signals using circuit B.

As a result of the joint action of low-frequency and high-frequency voltages, an electric current passes through a neon lamp, the law of variation of which is shown in the oscillogram: (Fig. 2). The part of the curve coinciding with the zero line is obtained because these places have less voltage than those in which the gas in the neon lamp B is ionized.

The oscillogram (Fig. 2) shows that through the indicator P a current will flow with a frequency of change equal to the frequency of the low-frequency voltage supplied by potentiometer A ow,

In order for the circuit of FIG. 1 could recall the radio signals coming from the neper of the transmitting stations, it is necessary to establish such a voltage of the low-frequency emf with potentiometer D so that it is slightly lower than the ignition voltage of the neon lamp. The incoming high-frequency; EMF added to the low-frequency emf will ionize the gas in the neon lamp, as a result of the oscillation through the neon lamp B and the indicator G will pass the electric current, the law of variation of which is shown in Fig. 2. It can be Detected or by using the phone ina hearing or using a relay for zashisi.

Thus, the role of the local source is to bring the lamp to the ionization threshold, which occurs only when the incoming signals are superimposed. The ionization current follows the changes in the incoming signals and is reproduced by the indicator T.

The subject matter of the invention.

A device for receiving radio with a glow-discharge lamp, characterized in that a glow-discharge lamp is connected to a circuit of: local source I of a low frequency and circuit B of received signals of a high frequency in series.

Fig 1

Fig 2