SU978375A1 - Digital signal transmitting and receiving device - Google Patents

Description

(54) DEVICE FOR TRANSMITTING AND RECEIVING DIGITAL SIGNALS

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The invention relates to telecommunications and can be used for transmitting and receiving signals in digital systems.

A device for transmitting and receiving digital signals is known, comprising on the transmitter side a digital signal source with a clock source, the output of which is connected to the input of the pulse former, the first output of which is connected to the first input of the first element: And the output of which is connected to the first input of the adder, which is connected via a trigger to the input of the output matching unit, and the output of the digital signal source is connected to the second input of the first And element, and on the receiving side the clock receiver signal, the input matching unit, the output of which is connected through a serially connected filter and pulse shaper is connected to the first input of the first one-oscillator and to the first input of the first element, AND, the output of which through the second one-oscillator is connected to the first input of the first trigger, the second input of which is connected to the second input of the first vibrator / while the output of the first trigger is connected to the receiver of the digital signal 1 J.

However, the known device has insufficient throughput.

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The purpose of the invention is to increase throughput.

In order to achieve this goal, a sync driver was introduced into the device for transmitting and receiving digital signals on the transmitting side; 1a and the second And element whose output is connected to the second input of the adder, the sync signal of the Formating 20 l being connected to the first input of the second And element, the second input which is connected to the second output of the pulse generator, and on the receiving side a sync signal extraction unit, the bottom of the trigger, a resonant unit and an inverter are input whose output is connected to the receiver input of the clock signal , the second input of the first trigger and the first input of the second trigger, the second input of which is connected to the output of the third trigger, the first input of which is connected to the output of the first one-one vibrator and the input of the resonant unit whose output is connected to the second input of the first element I, the second input of the third trigger and the input is inverted. torus, while the output of the second trigger is connected to the input of the block sync signal. FIG. 1 shows a structural electrical circuit of the device; in fig. 2 - timing diagrams for the operation of the device. The proposed device for transmitting and receiving digital signals contains a digital signal source 1, And 2, 3 elements and, a clock signal source 5, shapers 6 and 7 pulses, a clock shaper 8, an adder 9, triggers 10-13, an output matching unit 14, an input a matching unit 15, a filter 16, one-shot 17 and 18, a resonant unit 19, an inverter 20, a clock signal receiver 21, a digital signal receiver 2, a clock extraction unit 23. . The device works as follows. The signal (Fig. 2a) from the digital signal source 1 is fed to one of the inputs of the first element I 2. The clock signal (Fig. 26) from the 5 clock signal source is fed through the pulse shaper 6 to the first input of the first element 2. The sync signal (Fig. 2c) from the generator 8 of the synchronization signal is fed to the first input of the second element I 3. The pulses from the first output of the driver 6 of pulses (Fig. 2d), coinciding with the digital signal (Fig; 2d), arrive at the first input of the adder 9, and the pulses of the second .output driver 6 pulses (Fig. 2e) with In the presence of clock pulses (Fig. 2c), they are fed (Fig. 2g) to the second input of the adder 9. The total pulse sequence (Fig. 2h forms at the output of the series-connected trigger 10 and the output of the matching unit 1 a relative signal (Fig. 2i). Its transitions Signs of a digital signal are transferred between the levels at the boundaries of the clock intervals (the presence of a transition is in the transmission of digital 1, and the absence in the transmission of 0). Transitions in the middle of the clock intervals are signs of a clock sync signal, and their absence characterizes the transmission of an additional sync signal. The relative bi-pulse signal passing through the physical circuit, the input matching unit 15 and the filter 16 is fed to the pulse shaper 7, which converts the transitions into a pulse sequence (Fig. 2k). From this sequence, using the signal of the first one-shot 17 (Fig. 2l), the resonant unit 19 (Fig. 2m) and the inverter 20 restore the clock signal (Fig. 2n) to the clock receiver 21. Due to the feedback from the output of the inverter 20 to the second input of the first laser oscillator 17 and the inertia of the resonant unit 19, only pulses located in the middle of the clock intervals and missing only when transmitting rare sync signals are separated from the mixture by the single vibrator 17. The clock signal of the resonant unit (Fig. 2m) passes through the third element And 4 pulses of the imaging unit. 7 pulses arising at the boundaries. clock intervals and the corresponding transmission units of the digital signal (Fig. 2o). An increase in their duration (Fig. 2p) for reliable reception occurs in the second one-shot 18, and overwriting the clock signal (Fig. 2n) with positive input signal levels of the trigger 11 to its inverse output allows restoring the digital SI1 signal (Fig. 2p) incoming 22 digital signal receiver. I The absence of transitions in the middle of the contact intervals and, accordingly, a high voltage level at the output of the first one-vibrator 17 (Fig. 2L) at the moments of positive transitions of the signal of the resonant unit 10 (FIG. 2m) allows the trigger signal 12 to recover the sync pulses (FIG. 2c). To match their temporal positions with the clock intervals of the digital signal (fig., The trigger signal 12 (fig. 2c) is transcribed by positive clock signal transitions (fig. 2n) to the output of the trigger 13, thereby forming a sync signal (fig; 2t), which enters the sync signal allocation unit 23. Thus, all three received digital signals of FIG. 2p, 2n, 2t) fooTBercfByioT are transmitted (FIGS. 2a, 26, 2c) in duration and temporal positions relative to each other. as a sync signal shows the transfer of byte sync The first bit of an octet is marked (Fig. 2c, 2i, 2t). In comparison with a known device, the increase in throughput in the proposed device is achieved by transmitting a clock signal without increasing the number of levels and reducing the duration of the pulses. signals, containing on the transmitter side a digital signal source with a clock source, the output of which is connected to the input of the pulse shaper, the first output of which is connected to the first input of the first The input I, whose output is connected to the first input of the adder, whose output is connected via a trigger to the input of the output matching unit, where the output of the digital signal source is connected to the second input of the first And element, and on the receiving side the clock signal receiver, the input matching unit , the output of which is connected through a series-connected filter and pulse shaper connected to the first input of the first one-shot and to the first input of the first element I, the output of which is connected to the first input through the second one-shot the first trigger, the second input of which i is connected to the second input of the one-shot vibrator, while the output of the first trigger is connected to a digital signal receiver, characterized in that, in order to increase the throughput, a sync signal generator and the second element I are inserted on the transmitting side The output of which is connected to the second input of the adder, and the output of the clock generator is connected to the first input of the second element I, the second input of which is connected to the second output of the pulse generator, and at the receiving one (to the side of the input-. There are two trigger triggers, a resonant block and an inverter, the output of which is connected to the receiver input of the Clock signal, the second input of the first trigger and the first input of the second trigger, the second input of which is connected to the output of the first one-oscillator. and the input of the resonant unit, the output of which is connected to the second input of the first element And, the second input of the third trigger and the input of the inverter, while the output of the second trigger is connected to the input of the allocation unit inpr6 (; ign., Information sources taken into account in examination 1. USSR author's certificate No., class H Qif B 5/02, 1979 (prototype),

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Claims (1)

claims the filter and the pulse shaper are connected to the first input of the first one-shot and to the first input of the first element And, the output of which through the second one-shot is connected to the first input of the first trigger, the second input of which is connected to the second input of the second one-shot, while the output is first • A trigger is connected to a digital signal receiver, characterized in that, in order to increase throughput, a signal generator and a second element are inserted into it on the transmitting side NT, whose output is connected to the second input of the adder, and the output of the clock driver is connected to the first ’input of the second element · 20 and I, the second input of which is connected to the second output of the pulse driver, and on the receiving side. There are two triggers, a resonant block and an inverter 25, the output of which is connected to an input device for transmitting and receiving digital signals, containing on the transmitting side a digital signal source with a clock signal source, the output of which is connected to the input of a pulse shaper, the first output of which is connected to the first input of the first element And, the output of which is connected to the first input of the adder, the output of which is connected via a trigger to the input of the output matching unit, and the output of the digital si Nala connected to the second input of the first AND gate, and at the receiving end - a receiver clock signal, an input matching unit, the output of which through subsequent home receiver clock signal WTO · eye input of the first flip-flop and the first input of the second flip-flop, a second input coupled to an output 30 of the third trigger, the first input of which is connected to the output of the first one-shot. and the input of the resonant block, the output of which is connected to the second input of the first element And, the second input of the third trigger and the input of the inverter, while the output of the second trigger is connected to the input of the block selection ^ clock signal. ' \