SU1676108A1 - Digital signals regenerator - Google Patents

Abstract

The invention relates to communication technology. The purpose of the invention is to increase the reliability of regeneration. The discrete signal regenerator contains an input amplifier 1, a comparator 2, a detector 3, a threshold control block 4, a shaper 5 output information pulses, a strobe block 6, an inverter 7, blocks 8 and 11 of sampling and storage, a generator 9, an operational amplifier 10. The output the signal of the detector 3 is removed from the midpoint and fed to the input of block 4. It is influenced by the signal

Description

1

From detector E, a threshold voltage is generated, which is supplied to comparator 2, where it is compared with the signal from input amplifier 1. This makes it possible to monitor the structure of the input signal. Voltages 8 and 11 are formed at the outputs of the pulses 8 and 11

information pulse. The signal from the output of the operational amplifier 10 generates a difference signal that biases the frequency of the oscillator 9. This tracking can significantly increase the reliability of regeneration. 2 Il.

The invention relates to a communication technique and can be used to receive discrete signals.

The purpose of the invention is to increase the reliability of regeneration.

Figure 1 shows the structural electrical circuit of the proposed discrete signal regenerator; Fig. 2 shows stress plots showing his work.

The discrete signal regenerator contains an input amplifier 1, a comparator 2, a detector 3, a threshold control block A, a shaper 5 output information pulses, a gating block 6, an inverter 7, a first block 8 of sampling and storage, an oscillator 9 controlled by voltage, operational amplifier 10, second sampling and storage unit 11.

The discrete signal regenerator works as follows.

The signal is fed to the input amplifier 1 (Fig. 1), where it is amplified to the level necessary for the detector 3 to operate in the linear mode (Fig. 2a). The output signal of the detector 3 is taken from the midpoint and is fed to the input of the threshold control unit 4, which, under the influence of the signal from the detector 3, generates a threshold voltage, which is fed to the comparator 2, which is compared with the signal from the input amplifier 1. Such a construction allows you to monitor the structure of the input signal and produce a threshold voltage offset when changing the ratio of the logical O and 1 in the signal. Thus, this scheme allows automatically regardless of the structure and amplitude of the signal to maintain s comparator 2 the optimal decision threshold.

From the output of the comparator 2, the corrected signal is fed to the information inputs of the first and second blocks 8 and 11 of the sample and storage (Fig. 2b). The control inputs of the first and second blocks 8 and 11 of the sample and storage receive a signal from the generator 9 controlled by the voltage (Fig. 2c, d). If the pulses from the generator 9 controlled by the voltage and their inversion are located relative to the information pulses as shown in Fig. 2a, c, d, i.e. since their fronts coincide with the centers of information pulses, the same voltages proportional to half the area of the information pulse are formed at the outputs of the first and second blocks 8 and 11 of the sample and storage. At the same time, the voltage at the output of the operational amplifier 10, which is a differential device and is made at the differential amplifier, remains unchanged, and, therefore, the pulse frequency does not change from the voltage controlled oscillator 9.

When the frequency of the input signal changes, the voltages at the outputs of the first and second blocks 8 and 11 of the sample and storage change and, due to this change, the operational amplifier 10 generates a difference signal that biases the frequency of the voltage controlled oscillator 9.

The output signal of the regenerator at the output of the imaging unit 5 is shown in FIG. With the appearance of large series O or 1, the first and second blocks 8 and 11 of the sample and storage store information about the signal with sufficient accuracy, which ensures the synchronization of the received signals.

The pulses from the generator 9, which is controlled by the voltage, are fed to the input of the block b, which produces short strobe pulses used to synchronize the received signals.

Claims (1)

Invention Formula A discrete signal regenerator containing a serially connected input amplifier, whose input is the input of the regenerator, a detector, a threshold control unit, a comparator, to the second input of which the output of the input amplifier is connected, and a driver of output information pulses, the output of which is the first output of the regenerator, differing in that, in order to increase the reliability of regeneration, a gating unit, an inverter and a serially connected first sampling and storage unit are introduced into it, the second amplifier, a voltage controlled oscillator, and a second sampling and storage unit, the information input and output of which are connected respectively to the output of the comparator, which is connected but G A .P. BUT 6 To the information input of the first sampling and storage unit, and with the second input of the operational amplifier, the output of the inverter connected to the output of the voltage controlled generator and to the input of the gating unit, output which is the second output of the regenerator and is connected to the second input of the output information pulse driver. R Pui.Z