SU1292025A1 - Information reception device - Google Patents

Abstract

The invention relates to the field; These computers are used in devices where the transmission and reception of information is carried out by parallel code in the form of pulsed signals. The aim of the invention is to increase the reliability of the reception of information by forming a building pulse. The device contains a block of selectors in amplitude, a block of AND elements, an OR element, AND, NOT, OR elements and delays. 2 Il.

Description

The invention relates to computing technology, in particular, to devices for transmitting and receiving discrete information.

The purpose of the invention is to improve the noise immunity of receiving information by generating a gating pulse.

Fig, 1 shows a functional diagram of the device; FIG. 2 is a time chart for receiving information.

The device (figure 1) contains the selector block in amplitude, the element OR 2 the first element is NOT 3, the first element 4 delay, the first element And 5, the second element 6 delay, the second element NOT 7, the second element And 8, the block elements And 9, device inputs 10 ... 10 and device outputs 11 ..

The selector unit in amplitude 1 is designed to select in amplitude the pulses applied to the inputs of the device. The block can be implemented on n elements NOT, for example, IC 133 series, since these elements have the property of selection according to the amplitude of negative polarity pulses. This property is due to the fact that the difference between the potential of the initial high level at the input and the response level of the element NOT from the low potential is sufficiently large and such operation from interference caused by external causes with respect to the information transmission circuits is unlikely.

The elements OR 2, NOT 3, delays 4 and 5, delays 6, NOT 7, and 8 are designed to form a strobe pulse of the required duration. In this case, the OR element 2 is designed to generate one pulse while simultaneously entering the inputs of any number of information pulses. The element OR 2 also has the property of selection in amplitude and can be implemented on an IC, for example, 133 series. Elements 3 and 7 are designed to invert the pulse of the generated gate. The delay element 4 is designed to delay the leading edge of the pulse coming from the output of the element HE 3 at time t. With the aid of the delay element 6, the leading edge of the pulse coming from the output of the element 5 is delayed by an amount t 5.

five

0

five

0

Elements 4 and 6 of the delay can be implemented, for example, on the elements NOT; IC 133 series. The values of time t and t 2 are selected by the total time of delays of the elements NOT connected in series ..

Element And 5 forms the leading edge of the strobe pulse delayed by time t, and element 8 forms the trailing edge.

In the initial state, a high potential is applied to all inputs of the device. In this case, a high potential is formed at the outputs of the element OR 2 and the element NOT 7, and at the outputs of the remaining elements - a low potential, Block 9 of the AND elements is blocked by the second inputs by the inhibitory potential from the output of the And 8 element.

At the inputs 10, ... 10 | The device information is simultaneously received by a parallel code in the form of pulses of negative polarity and the same duration. From these inputs, information pulses arrive at the corresponding inputs of block 1 of selectors in amplitude and element OR 2. Block 1 of selectors in amplitude inverts information pulses to the first inputs of block 9 of elements I. Further passage of information pulses is blocked by low potential on all second the inputs of the block 9 elements I.

5 I

The element OR 2, when pulses of information are received at the inputs 10, ... 10p, generates one pulse at the output to form a gate. This

0 pulse through the element NOT 3, inverted, is sent to the first input of the element AND 5, to the second input of which the same pulse arrives through the element 4 delay. At the output of the element And 5, a pulse is generated, the leading edge of which is delayed by the time t, relative to the leading edge of the pulse from the output of the element HE 3, and their falling edges coincide.

0 from the output of the element And 5 is fed to the first input of the element And 8, to the second input of which the same pulse goes through the delay element. 6 and the element is NOT 7 and the output of the element is And 8

5 produces a pulse whose leading edge coincides with the leading edge of the pulse at the output of the element 5 and has a duration t. This pulse is a gating pulse, since during the pulse the information pulses are allowed to pass through the block 9 of the elements AND to the inputs of the device. The pulses of information are fed to the inputs 11, ... 1 1 only during the action of the strobe signal.

Figure 2 shows, as an example, the time diagram for receiving information — And the following designations are accepted: 10,102, ..., 10 — device inputs that receive information pulses — J 10 j — device input to which, in this example, the information pulse is not

The time t is chosen such that it is minimal and at the same time sufficient to reliably

enters and on which information reception, disturbance pulses arise; 12, 12, ...,. Pulse 19 is gated

information impulses on the corresponding-impulse for impulses 12 ... 12 and

on the inputs of a block of 9 I5 elements — on the outputs of a device 11 ... 11, impulses of interference on the corresponding pulses of information appear only

the input unit 9 elements And; 13 - time t.

pulses at the output of the item ШШ 2; 14 - Thus, an increase in the noise pulse at the output of the HE 3 element; 15 — a pulse at the output of the delay element 4; 16 — a pulse at the output of the information reception capability that is generated by the generated gate pulse 19 having the HEJ pulse 17; - the minimum required duration of delay 6 is 6; 18 — the pulse is not located in the time interval after the element 7; 19 - gating pulse at the output of the element And 8j

tupleni pulses of information so that ensures complete selection of interference occurring on both fronts

eleven

11n, ..., 1L - informational pulses) ()

on the corresponding outputs of the device; And level 3 potential at the corresponding output device

For transmitting information, the duration of the pulses is of such a magnitude that their reproduction by interference pulses is unlikely. During the arrival of information pulses at the inputs 10, 10, ..., 10 of the device, on the fronts of these pulses, noise signals are generated at the input lOj. With a sufficient level of these interferences, pulses appear at the corresponding input of block 9 of the AND elements, which, if skipped,

through this block, AND elements, the delay elements and the received information can lead to acid. cops NOT, picking up the first item NOT

connected to the first input of the first element I and through the first element of the radio rsi connected to the second input of the first element I, whose code is connected to the first input of the second element I and through the second delayed element connected in series and the second element NOT to the second input

The leading edge of the pulse 15 is formed after time t, from the leading edge of the pulse 14. The pulse duration 15 can be approximately equal to the pulse duration 14. The time t is chosen so that it is longer than the time of appearance and disappearance of the interference pulses

to the leading edge of pulses 10 ... 10 | . 55 second element And the output of the second

The leading edge of the pulse 16 coincides with the element I and is connected to the second input with the leading edge of the pulse 15, I will give a block of elements I.

and the back front - with the falling edge of the pulse 14.

The leading edge of the pulse 17 is formed after a time t from the forward pulse 16, and its duration may be approximately equal to the duration of the pulse 16.

The leading edge of pulse 19 coincides with the leading edge of pulse 16, and the falling edge - with the falling edge of pulse - 17.

The time t is chosen such that it is minimal and at the same time sufficient for reliable reception of information, Pulse 19 is gating

the required duration n is located in the time interval

tupleni pulses of information so that ensures complete selection of interference occurring on both fronts

pulses of information.

Claims (1)

Invention Formula A device for receiving information; containing a block of selectors in amplitude, the outputs of which are connected to the first inputs of the block of elements I, the outputs of which are the outputs of the device, each input of the device is connected to the inputs of the block of selectors the amplitude and the element of SHS, about t l i-. that, in order to increase the noise immunity of the reception of information by forming a strobe pulse,  / ten  P  t but VU2. .  I. . . . CH1P Editor A. Vorovich Compiled by O. Dundua Tehred L.Oleynik Proofreader A.T sko Order 274/50 Circulation 544 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Mo.skva, Zh-35, 4/5 Raushsk nab. Production and printing company, Uzhgorod, st. Project, 4