SU1359884A2 - Square-wave generator - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automation, telemechanics and computer technology. The purpose of the invention — extending the scope of use and increasing reliability — is achieved by allowing the initial generation phase to be set and forming a full-length first pulse and interval. The device contains a counter 1, a master oscillator 2, a sensor 3 for a duration code, a sensor 4 for an interval code, a differentiating circuit, a two-channel group multiplexer 6, a counting trigger 7, elements 8 and 15 coincidence, a scale code sensor, a channel multiplexer 10, an n-output divider 11 pulses, elements OR 12 ,. 16, 18 and 21, element And 13, the inverter 14, the trigger 17, the driver 19 pulses and the sensor 20 modes of operation. Supply from sensor with: (L 00 SP from 00 oo 4 14)

Description

1359884

9 corresponding codes, it is possible to substitute a change in the frequency of the output keys to the input of the counter 1 of different pulses in a wide range of the unavailable outputs of the divider 11, than depending on the duty ratio. 2 Il.

one

The invention relates to a pulse technique, B automatics, telemechanics and computational techniques can be used, and is in addition to auth.s. No. 913565, The purpose of the invention is to expand the scope of application by allowing the initial phase of generation to be set and forming a full-length first pulse and interval and increasing reliability.

FIG. 1 shows a functional diagram of a generator of rectangular pulses; in fig. 2-time diagrams for his work.

The device contains a counter 1, a master oscillator 2, a sensor 3 for a duration code, a sensor 4 for an interval code, a differentiating circuit 5, a two-channel group multiplexer 6, a counting trigger 7, a coincidence element 8, a scale code sensor 9, a n-channel multiplexer 10, a pulse output divider 11, first element OR 12, element 13, inverter 14, comparison element 15, fourth element OR 1b, trigger 17, third element OR 18, pulse shaper 19, operating mode sensor 20, second element OR 21.

The sensor 4 outputs of the slot code are connected to one group of information inputs of multiplexer 6, the sensor outputs of the duration code 3 are connected to another group of information inputs of multiplexer 6, whose address input is connected to the output of counting trigger 7, the outputs of multiplexer 6 are connected to one group of inputs of coincidence element 8, the other group of inputs of which is connected to the outputs of the counter 1, and the output of the coincidence element 8 is connected via a differentiating circuit 5 to the reset-counter input 1 and the counting input of the trigger 7, and din of

information inputs of the n-channel multiplexer 10 is connected to the output of the master oscillator 2 and to the input of the divider 11 pulses. The outputs of the tel 5 bodies 11 pulses are connected to other information inputs n-ka-. multiplexer 10, the control inputs of which are connected to. the outputs of the sensor 9 code scale,

0 and the output of the n-channel multiplexer 10 is connected to the input of counter 1. The first element OR 12 is connected between the input of the coincidence element 8 and the input of the differentiating circuit 5, and

5 the second element OR 21 is between the output of the differentiating circuit and the reset input of the counter 1. The operation mode sensor 20 is connected by one input to the input of the comparison element 15, and the other to the second input of the second OR 21 element, the first input of the trigger 17 and the third the element OR 18 connected between the output of the trigger 17 and the input of the imaging unit 19 pulse 25

owl, the output of which is connected to the input of the element AND 13, the output of which is connected to the second input of the first element OR 12, and the second input - to the output of the inverter 14 connected

entrance from the first output of the comparison element 15, the second input of which is connected to the address input of the two-channel multiplexer 6, the second output through the fourth element OR 16 to the second input of the trigger 17, and the second input of the fourth element OR 16 is connected to the input of the counter.

The operating mode sensor contains, for example, a memory register and a single pulse shaper and is used to set the initial phase of the generated signal and to issue a Reset signal.

Square pulse generator

works as follows.

From the first output of the sensor 20, the mode of operation is given to the element cac31359884

The potential corresponding to the output signals, and c (Fig. 2), which through 21 establishes the initial state and the S-flip-flop 17. Then, it goes through the main t and n and p m and p n

signal generation, is compared on the comparison element 15 with the signal from the counting trigger 7. If these signals do not match, a low potential is set on the inverse output of the comparison element .15, and a high potential on the forward one, which triggers the 17 signal through the OR 16 element. the trigger 17 through the element OR 18 starts the driver 19 of a single pulse. The low potential from the inverted output of the comparison element 15 through the inverter 14 allows the signal from the driver 19 pulses to enter the input of the element 13. The signal from the output of the element 13 through the element OR 1-2 and the differentiating circuit 5 is fed to the input of the counting trigger 7 and changes understanding of its outputs.

If the state of the counting trigger 7 at the first moment of time corresponds to the signal from the sensor 20 of the operating mode, i.e. the desired initial phase of the output signals of the generator, ele-v. Comparison moment 15 through inverter 14 generates a signal that prohibits the passage of signals through AND 13 element. In this case, the trigger 17 is inputted from the first signal that came through the OR 16 element from the n-channel multiplexer 10, while the OR 19 pulse element is started through the OR 18 element , in, but the output of the element And 13 signals from the imaging device 19 are not received and, therefore, the trigger 7 remains in the same state, i.e. control of the initial generation phase is carried out.

Next, the generator begins to generate pulses. From sensor 3, a parallel binary code is fed to a group of inputs of one of the channels of multiplexer 6; simultaneously, from sensor 4, a parallel binary code is fed to a group of inputs of another channel of multiplexer 6, which, depending on the state of the counting trigger 7, matches to one group of inputs of coincidence element 8 or .outputs of sensor 3, or outputs of sensor 4,

0

five

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five

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five

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five

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At the same time, another group of inputs of the coincidence element 8 from counter 1 receives the code that occurred at its outputs when counting pulses that come from the output of the n-channel multiplexer 10. The counting of pulses by counter 1 continues until the code formed at the output the counter 1, and the code already entered into the coincidence element 8 does not coincide; at the output of the coincidence element 8, a signal appears which, through the OR element 12 and the differentiating circuit 5, zeroes the counter 1 and simultaneously transfers the trigger 7 to the new state as well as If trigger 7 is connected to the address input of multiplexer 6, the latter connects to the coincidence element 8 a group of its inputs from the second sensor. Thus, if the outputs of sensor 3 are connected, then the outputs of sensor 4 are connected and vice versa. Thus, from the output of the trigger 7, a sequence of rectangular pulses with a predetermined duration and interval is obtained. The residence time of the trigger 7 in the first and second states (respectively, the pulse duration and the interval duration) is determined by the codes that are fed to the coincidence element 8 alternately from two sensors 3 and 4, and the frequency of the pulses from the output of the n-channel multiplexer 10 to counter input 1. By changing the frequency of these pulses, it is possible to change the frequency of the generator's output pulses, leaving the duty cycle unchanged, i.e. to control the scale of the output pulse sequence. This happens as follows. From the scale code sensor 9, a parallel binary code arrives at the address (control) inputs of the n-channel multiplexer 10. Depending on the incoming code, only one of the n-channels of the multiplexer -10 is opened, and since this channel is connected to one of the outputs n- If the bit divider 11 pulses, then the pulses from this output pass through the n-channel multiplexer 10 to the input of counter 1.

Thus, by supplying the corresponding codes from sensor 9 of the scale code, you can connect different outputs of divider 11 to the input of meter 1, which ensures the change in the frequency of output pulses in a wide range regardless of the duty ratio (i.e., the value of codes received from sensors 3 and 4).

Claims (1)

Formula of Rectangular pulse generator auth.St. No. 913565, characterized in that, with the aim of expanding due to the possibility of setting the initial phase of generation and forming a full-fledged activity of the first pulse and interval and increasing reliability, four OR elements are inserted in it, the first of which is connected between the output of the coincidence element and the input the differentiating circuit, and the second between the differential circuit and the reset input of the counter, the comparison element, the trigger, the pulse driver, the element And, the mode sensor connected by one output to the input of the element vneny and the other - to the second input of the second OR gate, a first input of th flip-flop and the acquisition of the third OR gate included between the trigger output and the input of the for- and pulse generator, the output of which is connected to the input of the element I, the output of which is connected to the second 15 input of the first element SH, and the second input through the inverter is connected to the first output of the comparison element, the second input of which is connected to the address input two channel multiplexer, the second output through the fourth element OR - to the second input of the trigger 20 Hera, and the second input of the fourth element OR is connected to the input of the counter. A / L a tire Editor M.Kelemes transfer of insormations 9us.2 Compiled by A.Titov Tehred L. Serdyukova Proofreader S. Shekmar Order 6163/55 Circulation 900 Handwritten VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Hera, and the second input of the fourth element OR is connected to the input of the counter.