SU725264A1 - Subscriber's call device - Google Patents

Description

The invention relates to radio engineering and can be used in the internal communication systems of enterprises / institutions or in moving objects. A subscriber communication device is known that contains a tone generator, the output of which is connected to the first input of the power supply unit to the line, a serially connected microphone and an amplifier, the output of which is connected to the second input of the connection unit to the line, the receiving unit whose input is connected to the output of the unit: connection to the line, and the output with the input of the loudspeaker 1. The known device does not have sufficient accuracy to establish a connection during conversations. The purpose of the invention is to improve the accuracy of the connection when sparing. The goal is achieved by the fact that in a subscriber intercom system containing a tone generator, a call whose output is connected to the first input of the line connection unit, a microphone is connected in series and an amplifier, the output of which is connected to the second input of the line connection unit, the reception unit whose input connected to the output of the connection unit to the line, and the output - to the input of the loudspeaker, introduced depots from series-connected alternator-single pulses, a trigger, a differential circuit and an electronic o key (n is the significance of subscriber numbers), as well as the output switching unit. The outputs of the call diverting unit are connected to the corresponding inputs of the single pulse generators, the additional outputs of which are connected to the additional inputs of electronic keys, the outputs of which are connected to the corresponding inputs of the tone generator. The setup inputs of the triggers are interconnected and connected to the speaker output, the auxiliary input of which is connected to the auxiliary microphone input. The drawing shows a structural electrical circuit of the device. Subscriber talk station includes a tone call generator 1, a line connection unit 2, a reception unit 3, a microphone 4, an amplifier 5, a loudspeaker b, a block 7

725264

call switching and n circuits, consisting of a generator of 8 single pulses, trigger 9, differential circuit 10 and electronic key 11.

The device works as follows. ,

Establishing a call starts from the call signal, which is done by pressing one of the buttons on block 7, 7) on the first call, the signal from which is sent to the input of the generator of 8 single pulses.

The generator 8 single pulses has two outputs. From the first output, the signal arrives at the counting input of the corresponding trigger 9, which is triggered and stores the address of the call. From another output, the signal enters the input of the corresponding electronic key 11 and opens it for the time of making a call (determined by the time of pressing the button of the call switching unit 7).

The load of the electronic key 11 is a tone call generator 1, which generates a call signal, which through the connection unit 2 to the line enters the communication line.

After completing the connection, the defender is carried out with g, the main speakerphone, which includes a microphone 4c with amplifier 5 and a receiving unit 3 with a loudspeaker b, enclosed in a common case.

After the end of the conversation, the subscriber returns the intercom to its original state, securing it to the subscriber intercom case, as a result of which a reset signal is generated, which returns the trigger 11 to its original state. The reset signal is generated by pressing a button and closing through the button the trigger inputs on the common bus.

The trigger that remembers the call address returns to the “out” Hde state, and the other states do not change.

At the output of the trigger 9, a voltage drop is formed, which, after passing through the differential circuit 10, for a short time (long pulse) unlocks the electronic key 11,

Under the influence of the public electronic key 11, the tone call generator 1 generates a short-duration signal, the frequency of which coincides with the frequency of the call signal, which, having passed through the line connection unit 2, serves as a switching reset signal.

The main positive effect of the application of the invention is the automation of call signaling and resetting, eliminating the possibility of erroneous switching and a false call after the end of the connection. The invention allows the use of a subscriber station not only B; telephone mode, but also in radio communication, both in stationary conditions and in mobile objects.

Claims (1)

1. Balakin A.S. and others. Communication on industrial enterprises. M ,, Holy Hour, 1971, p. 180-181 (prototype).