RU1811026C - Device for independent two-user telephone communication - Google Patents

Abstract

The invention relates to wired electrical communications and can be used in telephony. The purpose of the invention is to reduce energy consumption by generating a discrete ringing signal. The device contains: 2 telephone sets (1,2), 1 power transformer (3), 1 primary winding of the power transformer (4), 2 secondary windings of the power transformer (5, 6), 1 rectifier (7). 1 modulating transformer (8), 2 filters (9, 10), 1 AND element (11), 1 OR element

Description

Thebes. 1

The invention relates to the field of wired electrical communications and can be used in telephony.

The purpose of the invention is to improve operational and technical characteristics with a simple constructive solution.

For this, a third electronic key is inserted into the autonomous dual-subscriber telephone communication device, the output of the second electronic key being connected to the first input of the third electronic key, the output of which is connected to the first output of the primary winding of the modulation transformer, the outputs of the first and second pulse generators are connected to the output of the OR and the first electronic key, the output of the first pulse generator is connected to the second input of the second electronic key, the output of the second pulse generator is connected to the second th input of the third electronic key. Such a solution makes it possible to bring overhead signals to a standard form.

A comparative analysis of the patent and scientific and technical literature showed the absence of similar features between these analogues and the claimed device for autonomous dual-subscriber communication.

An additional electronic key is introduced in the inventive device. Such a circuitry solution allowed to change the characteristics of the service signals, to bring them to standard.

Fig. 1 is a structural electrical diagram of an claimed autonomous dual-subscriber telephone communication device; figure 2 - voltage diagrams at the outputs of pulse generators; in Fig.Z - forms of the ringing signal.

The device contains two telephone sets 1 and 2, a power transformer 3 with one primary 4 and two secondary windings 5 and 6, a rectifier 7, and the first output of the secondary winding 5 of the power transformer 3 is connected to the first input of the rectifier 7, the second input of which is connected to the second output of the secondary winding 5, and the first output of rectifier 7 is connected to the first input terminals of telephones 1 and 2, as well as a modulation transformer 8 with one primary and two secondary windings, two filters 9 and 10, element 11, the second output of rectifier m The body 7 is connected to the first inputs of the electronic keys 13 and 14, with the first output of the second secondary winding b of the power transformer 3 and also with the first inputs of the filters 9 and 10 and with the core 15 of the modulation transformer 8, the first conclusions of the first and second primary-secondary windings are connected respectively, with the second inputs of the input of the element And 11 and the first input of the element OR 12, the output of the second filter 10 is connected to the second input And 11 and the second input of the OR 12, the output of the element And 11 is connected to the second input of the first electronic key 13, the output of which one with the output of the OR element 12 and two pulse generators 17.18,

moreover, the output of the electronic key 14 is connected to the first input of the electronic key 16, the output of which is connected to the first output of the primary winding of the modulation transformer 8. The inputs of the pulse generators 17, 18 are connected to the outputs of the element OR 12 and the electronic key 13. The output of the pulse generator 17 with the second input electronic key 14. The output of the pulse generator 18 is connected to the second

electronic key input 16.

As generators of pulses 17 and 18 can be used the generator shown in the book Glutnikov B.C. Integral, Electronics in Measuring

devices. L., 1980, p. 235, fig. 15.5.

The device operates as follows.

Rectifier 7 connected to the first secondary winding 5 of the power

transformer 3, gives a constant positive voltage to the power supply circuit of telephone sets 1 and 2. When a subscriber picks up the handset from telephone set 1, a constant current will flow through it, which

then, having passed through the winding of the modulation transformer 8 and filter 9, it will get to the elements AND 11 and OR 12. The element will work and thereby turn on the generators 17 and 18. The generator 17 will give to the second input

key 14 rectangular pulses of duration n 3 s with pauses between them tg 3 s with a repetition period s. The second generator 18 will issue pulses n 1 ms with pauses between them to the second input of the key 16

 ms with a repetition period of ms (see Fig. 2), as a result of which the electronic switch 14 will send to the primary winding of the modulation transformer 8 parcels lasting 3 s and pauses 3 s voltage

industrial frequency, taken from the secondary winding 6 of the power transformer 3. Key 16 commutes these packages with a frequency of t 1 / T 1 / 2ms 500 Hz as a result of which the ringing signal consists of pulses with a frequency of 500 Hz, varying in amplitude and phase according to the voltage sinusoidal - a new form of industrial frequency (see Fig. H), which causes the appearance of a high-frequency call signal in the handset of telephone set 1, and telephone set 2 starts ringing, but at the same time, call signals last for 3 s with pauses of 3 s to of the time until the receiver is picked up Act 2. When it is removed by the subscriber, a direct current will flow through the telephone 2, which passed through the winding of the modulation transformer 8 and the filter 10 enters the elements I 11 and OR 12. The element I 11 will work and turn on the first electronic key 13, which will close the output of the OR element 12, as a result of which the generators 17 and 18 and the keys 14, 16 are turned off. The call signal hangs up, after which the subscribers can exchange information. When both tubes are placed, the device returns to its initial state. Similarly, the device operates in the reverse order by subscribers.

The sequential inclusion of keys 14 and 16, which control the respective generators, which are the calling device in the common circuit, allows

significantly improve operational and technical characteristics by bringing the service signals to a standard form, eliminate the need for

Claims (1)

special operating instructions. SUMMARY OF THE INVENTION Autonomous two-way telephone communication device No. 605334, characterized in that, for the purpose of To reduce energy consumption by generating a discrete ringing signal, a third electronic key and first and second pulse generators are introduced, the output of the second electronic key 5 is connected to the primary winding of the modulation transformer through a third electronic key, and the second input of the second electronic key is connected to the input of the OR element through the first pulse generator, in addition, the additional input of the third electronic key is connected to the input of the OR element through the second pulse generator. Phage t