SU782171A2 - Bipulse signal receiving device - Google Patents

Description

The invention relates to a technique for transmitting discrete messages and can be used in the construction of information transmission systems. A device for receiving a bi-pulse signal according to the main author. St. 467483 contains a series-connected limiting amplifier, a bi-pulse signal converter into a telegraph signal, and a phase detector with a clock phase frequency self-tuning node C. However, the accuracy of the bi-pulse signal in this device is low. . The purpose of the invention is to increase the reliability of bi-pulse signal reception. The goal is achieved by the fact that a bi-pulse signal generator, a successively connected amplifier-limiter, a bi-pulse signal converter to a telegraph signal, and a phase detector with a clock frequency-controlled node, are additionally entered into the bi-pulse signal selector, whose inputs are connected to the corresponding outputs of the amplifier is limited to 1, and the outputs of the selector are connected to the corresponding inputs of the converter, and the bi-pulse signal selector contains a pulse counter, The OR element, the trigger and two identical circuits, each of which contains a series-connected valve, register and element, whose outputs are connected to the corresponding inputs of the OR element, the output of which is connected to the first input of the pulse counter, the second input of which is connected to the register clock input of one circuits, the output of the pulse counter is connected to the second inputs of both valves, the first S inputs of which are selector inputs, the trigger inputs are connected to the outputs of the respective registers, the Trigger outputs are connected to the corresponding etstvuyuschim inputs of respective elements and, in addition, the second register input is fed control signals and the outputs of AND gates are outputs of the selector. FIG. Figure 1 shows the structural electrical circuit of the device described; in fig. 2 - timing diagrams explaining the operation of the biopulse signal selector.

The device for receiving a bi-pulse signal contains successively included amplifier-limiter 1, bi-pulse signal selector 2, bi-pulse signal converter 3 to a telegraph signal and phase detector 4 with a clock frequency auto-tuning node 5. The selector 2 has two identical. The circuits, each of which consists of a series-connected valve 6, register 7, element AND 8, outputs of the registers 7 of both circuits are connected to the inputs of the element OR 9. One output of the element OR 9 is connected to the second input of the element AND 8 of the first circuit, and its second output to the second input, element And 8 of the second circuit. The outputs of the elements AND 8 through the element OR 10 and the counter 11 pulses are connected to the control inputs of the valves b of both circuits and at the same time are the outputs of the selector 2,

The device receiving bi-pulse signal works as follows. The bi-pulse signal received from the communication channel is fed through a force. Limiter 1 to the input of the selector 2. The latter analyzes the duration of the positive and negative pulses of elementary signals from the bi-pulse signal. The duration of an elementary parcel, where B is the transmission rate. The analyzed signal is then fed to a transducer 3, made according to a trigger circuit, and the latter to a phase detector 4 with a node 5 of the phase clock auto-tuning.

Since converter 3 changes the phase of the output signal from the action of the leading edge of a pulse signal of any duration (without analyzing its duration), the appearance of a short duration pulse noise at its input leads to the formation of a spurious or distorted telegraph signal. The selector 2 analyzes the entire duration of the elementary parcel, which increases the noise immunity of the receiving device.

 In the initial position, the valves 6 of both circuits are in the state, since their control inputs from the counter 11 pulses receive a resolution signal. The biopulse signals go to the first (upper) circuit of the selector 2, and the negative parts to the second ( bottom) chain. Thus, if a bi-pulse signal corresponding to 1 is received from the output of the amplifier limiter 1 to the input of the selector 2 (fig.2a), then the positive part passed the valve G of the first circuit affects register 7, as a result of which the additional frequency pulses move bit to the last (Fig. 2 b). The capacity of the register 7 is selected on the basis of the half-duration of the elementary sending of the bi-pulse signal. Only in this case a pulse is generated at the output of the register 7 (Fig. 2c).

If the duration of the output signal is shorter than the time of movement of the additional frequency pulses in register 7 (i.e., less than its capacitance), which is possible in cases where short-length interference is received at its input, when the latter is jammed, the register 7 is zeroed and its output does not generate a pulse. A single pulse from the output of register 7, acting on the element OR 9, sets it to such a state

(Fig. 2 g), in which a pulse is formed at the output of the IW element. The output signal of the element And 8 through the element OR 10 starts the counter g 11 pulses, clocked by an additional frequency, which closes the valves 6 of both circuits. The volume of the counter 11 pulses is selected on the basis of the half duration of the elementary sending of the bi-pulse signal. 0 during this time, the valves b of both chains are in the closed state (in Fig. 2, the closed state corresponds to the zero level). After filling the counter 5 11 pulses, it is zeroed out, while its output signal opens the valves b. The output pulses of the And 8 element (Fig. 2c) lead to the operation of the converter 3. 0 The operation of the second selector circuit, when its input receives a bi-pulse signal of O (Fig. 2a), is similar to the operation of the first circuit.

The proposed device, due to the analysis of the entire duration of the elementary parcel, bi-pulse signal, has a high noise immunity, allows the converter to be converted, which can be Q made in the form of a trigger.

Claims (2)

1. A device for receiving a bi-pulse signal according to the author. St. 467483, characterized in that, In order to increase the reliability of biopulse signal reception, a biopulse signal selector is introduced, the inputs of which are connected to the corresponding outputs of the amplifier-limiter, and the selector outputs are connected to the corresponding inputs of the converter. 2. The device according to claim 1, about tl l and that the select:) p bi-pulse signal contains a pulse counter, an OR element, a trigger and two identical circuits, each of which contains a series-connected valve, register and AND element, the outputs of which are connected to the corresponding inputs of the OR element, the output of which is connected to the first input of the pulse counter, the second input of which is connected with the clock input of the register of one circuit, the output of the pulse counter is connected to the second inputs of both valves, the first inputs of which are the selector inputs, the trigger inputs are connected to the outputs of the corresponding uyuschih registers, flip-flop outputs are connected to respective inputs of the respective elements and, in addition, the second register input is fed control signals and the outputs of AND gates are outputs of the selector. Sources of information taken into account in the examination 0 1. USSR author's certificate No. 467483, cl. H 04 U 1/10, 1972. I About LI j I 1 gp m p pg- LL