SU107104A2 - Device for temporary multi-channel telephone communication - Google Patents

Description

BASIC Auth. St. No. 71601 describes a multiple communication device based on the principle of separating non-recurring signals into sections and subsequent compression in time of these sections. To lengthen the short pulses appearing at the boundaries of these sections, the signals of each channel are subjected to compression, and the free gaps are used to send correction signals.

The proposed device for temporary multi-channel telephone communication is a further development of the invention according to the indicated basic author's certificate and allows using it for transmitting telephone messages.

To this end, according to the invention, magnetic storage elements for temporary compressors in the transmitting part of the device, temporary distributors and expanders in the receiving part of the device and pulse lines and lamps are inserted into the multiple communication device to form control pulses supplying the receiving and transmitting matrices .

A simplified block diagram of a transmitter for temporary multi-channel telephone communication is shown in FIG. one.

To the input terminals of the device /, 2, 3 ..., L, the sources of messages not shown in the diagram (for example, telephone sets) are connected. The input terminals are connected to the VLZ delay input lines. Each of these lines is connected to temporary fi / C compressors by means of three taps, forming a transfer matrix and representing a series of magnetic storage elements capable of: fixing not only the sign, but also the instantaneous value of the function.

The room compressors are subdivided into three parts: the entrance zone of the ZU- / extension, the working zone of the relay protection and the output zone of the extension of the ЗУ-2. The fixation (recording) of the signal values occurs alternately on all the storage elements of the working area of the relay with a clock frequency that is selected on the order of 8 kHz. During the recording of the signal on the first and last storage elements of the working area, signals are recorded on the elements of the input and output zones of the extension of the memory and memory 2. These signals, due to the presence of input delay lines, in time with respect to the signals of the working area. The use of the continuation function of the signal in the extension zones allows the coordination of the work zone signals with the signals of the extension zones, in which the spectrum of the compressed portion of the function will be extremely narrow. After the recording of the signals on the elements forming the transfer matrix, the filled values of the signals are simultaneously reproduced and fed to the collecting stages of the IC. These are mop pilots with which the temporary compressors B1 are coordinated with the RLS delay distribution line. The latter has a number of inputs equal to the number of storage elements contained in the VC time compressors. Signals arriving at the inputs of the RLS delay delay distribution line at the output will turn out to be unrolled in time, since the running times of the signals from the inputs to the end of the lines are different. The distribution delay line, in addition to the firing of the time distribution of the signals, is used to form a signal. The distribution delay line is connected to an amplitude AK compressor, which is a broadband amplifier with instantly adjustable gain. To adjust the gain at the time of reading the signals recorded on the elements of the time VK compressors, the corresponding device included in the collecting stages C / (, measures the amplitudes of the pulses acting on

the outputs of the C / C collecting stages, and the corresponding control voltage is generated, which affects the amplitude compressor during the passage of signals from one channel.

The transfer matrix is controlled by special fixing and erasing pulses. Upon receipt of the locking pulses, signals are recorded. Elements located in the same column are triggered simultaneously by the action of a common fixing pulse. The matrix is divided into groups containing by m identical rows. Contiguous groups are characterized in that each lower group is displaced relative to the top by one line element. After the last (for a given group of rows) latching pulse, i.e., after the accumulation period and the time compressors are completed, the information accumulated in them using the pulse-erasing erasers is alternately read. The interaction of fixing and erasing them in the matrix when the matrix should be such that in the time intervals between the last and the first pulses of this group of m lines, the signals of the corresponding m channels are recorded.

A circuit, not shown in the block diagram of FIG. 1, is used to form the control pulses (locking and erasing) and powering the matrices. one.

The main element of this circuit is an immersion switching line, made on electron tubes. The ruler is controlled by pulses from the corresponding block of the synchronization system. At the outputs of the ruler alternately short pulses appear, opening lamps, in the anodes of which the windings of memory lines or columns of the matrix are included ... ..

The block diagram of the receiving part of the device for temporary multi-channel telephone communication is shown in FIG. 2

The signals coming from the line are fed to the input delay line of the VLR, which delays the signals by a time equal to the travel time of a group of signals of one channel. This delay is necessary to enable the measurement of the maximum level of signals of a given channel before these signals arrive at the input of the amplitude expander AE. The signal level determination and gain adjustment of the amplitude expander AE is carried out with the aid of the regulator level adjustment unit. The output of the amplitude expander AE is connected to the RL delay distribution line, the purpose of which is to convert signals that are deployed in time into signals that are deployed in space. At the moment when the signals of only one channel are accumulated in the distribution delay line of the RLS, they are reported to the temporary channel locker BP of the corresponding channel through a block of powerful amplifiers. The outputs of the power amplifier unit of the CU are connected to the time distributors BP of all channels. The accumulation of signals from this channel by the corresponding time distributor of BP occurs under the influence of clamping pulses produced in the pulse lines and lamp circuit in the same way as in the transmitting part of the device.

The expanded and extended signals from the output of the time distributors of the BP are fed to low-pass filters of the low-pass filter. These filters are used to generate signals, i.e., the selection of the frequency components characteristic of the original signal, which is fed to the channel input.

The signals of the extension zones are eliminated from the group of signals corresponding to a given channel, directly by the distribution delay line, which has no outputs in the extension zones.

Subject invention

A device for temporary multi-channel telephone communication, built on the basis of a device for multiple communication described in Aut. St. L 71601, characterized in that, in order to use this device for transmitting telephone messages, magnetic sealing elements for temporary compressors in the transmitting part of the device, temporal distributors and expanders in the receiving part of the device, n pulse bars, and lamps for forming control devices pulses that feed the matrix of the receiving and transmitting devices.

No. 107104

 four

Fng. one.

J ZhZh1111 p (G ((I g

 , pyttttch 14 k. in.

 YAGY: Matrix nep.ego-ju

l

, GTTT1 I i I I. I

SHTTGTGGGGP N

 pttptsht

RLZ

Jl-jhuS

fffffiffff G7

5i /

No. 107104

- 5 - FIG. 2

IОR

) J J) J f)) TTTTJ

r, „1 t

D)))) J rm) n n

Reception matrix