SU559261A1 - Device for receiving signals - Google Patents

Description

one

The invention relates to telemechanics and can be used for telemechanization or in industrial and power engineering. A device for receiving television signals is known, which contains a distributor, de-diffractors, forming circuits, and clock generators 1. This device has an insufficiently high accuracy of receiving signals with a temporary impulse sign.

The closest to the invention nd technical entity is a device that contains the shift register, the first inputs of which are connected to the inputs of the device, the outputs through the decoders to the inputs of the first and second elements And, the outputs of the second elements And connected to the installation inputs of the shift register 2. This device is peculiar lack of precision selek and pulses with a temporary pulse of the 1st sign.

The purpose of the invention is to improve the accuracy of the device.

This is achieved due to the fact that the device includes the elements AND, OR, triggers and a clock shaping unit, the outputs of the first elements AND are connected to the inputs of the triggers, the outputs of which are connected to the inputs of the corresponding second, third and fourth elements H, the outputs of the third elements AND are connected to the first inputs of the second triggers, the first outputs of which are connected by the ic inputs of the corresponding first AND elements, the second outputs of the second triggers are connected to the inputs of the fifth AND elements and to the inputs of the first OR element, the output of which oedinen ustryuystva to the first output. The inputs of the device are connected to the inputs of the sixth elements AND, the outputs of which are connected to the inputs of the corresponding second elements OR, the other inputs of which are connected to the outputs of the fifth elements AND, The outputs of the second elements OR are connected to the inputs ffl of the corresponding first triggers, the inputs of the device are connected to the second the inputs of the second trigger and to the inputs of the fourth elements And, the outputs of which are connected to the second outputs of the device. The first output of the clock shaping unit is connected to the second input of the shift register and to the inputs of the sixth elements I, the second output of the clock shaping unit is connected to the inputs of the first and fifth elements I.

The drawing shows a diagram of the device.

The device contains a block 1 forming the clock pulses, the shift register 2, the decryptor, the elements And 4,5, the element OR 6, the trigger 7 elements And 8-10, the trigger 11, the element And 12, the decoder 13, the elements AND 14,15, the element OR 16, trigger 17, elements AND 18-20, trigger 21, element AND 22, element OR 23.

The device works as follows. When receiving a signal, the control signal characterizing the health of the device, at its inputs alternates zeros and units. In this case, the triggers .. and 11 of the upper chain, the triggers 1.21 of the lower chain are in the state of code O, and in the shift register 2 a shift of alternating ones and zeros occurs.

When receiving a receipt signal, representing a series of units, zeros, the duration of which r is within (where n is the number of bits of the shift register, T is the duration of the clock), the upper circuit of series-connected elements works and at the output of the And 10 Forming impulse.

With the signal Call TC, which is a matching zero and one, the duration of which is determined similarly to the receipt Gig, the bottom circuit is working and the pulse will now be formed at the output of the And 20 element.

In those cases when the length of the consecutive characters (ones or zeros) is equal to or exceeds 2 pT, at the output of the OR element of the device 23, a channel break signal is generated.

Let, for example, on. device input arrives. Kvit1schi signal. After the n cycles of the pulse sequence at the output of block 1 in each bit of the penicipa desertion, one will be recorded and a potential arises at the output of the decoder 3, opening the elements And 5 and 8 along the corresponding inputs. state code 1 and through element 8 will transfer all bits of shift register 2 to the zero state. In addition, the resolution pause from the single output of the trigger 7 will prepare the elements And 9 and 10. i

At the time of the signaling of the receipt, the duration of which lies in the range from pt to 2pt, the logical unit and the element 10, whose output is connected to the circuit of the formation of the receipt signal, is triggered at the input of the device, and the trigger 7 at elements AND 4 or element OR 6 will go to the zero state.

Thus, the formation of the Sigal Receipt occurs simultaneously with the end of this signal at the input of the device.

. The ECJM signal duration is equal to or greater than 2pT, then after 2p cycles of the sequence of the patterns, the previously prepared AND 9 element is triggered and the trigger is triggered. Eve code state 1. At the same time, using the OR 23 element, the sital of the channel channel is formed. At the same time, through the elements I 12 and I.PI 6, the first trigger 7 goes into the initial (zero) state; otherwise, a receipt signal can be generated at m 2 pT.

Similarly, the device operates at

receiving a call Call Wake and Channel Break,

only this works shzhnivsh. items.

The device has a block 1 of generation of clock pulses J allowing easy synchronous operation of the transmitter and receiver of the reverse channel for remote signaling.

Such a device design ensures accuracy in allocating links with a temporary impulse indication.

Claims (2)

1. Bilik R.V. and others. Contactless elements and systems of telemechanics with time division of signals, M., 1964, p. 347. 2. Questions of industrial telemechanics, M., Energie. 1970, pp. 146-164.