SU1624671A1 - Pulse duration converter - Google Patents

Abstract

The invention can be used in systems for processing and generating pulse signals. The goal is to increase accuracy and resolution. The device contains a shaper 1 codes, elements OR 2 and 3, elements AND 4 and 5, a pulse counter 7, a generator of 8 clock pulses, input buses 9, an output UIHHV 10. The introduction of accumulating adder 6 makes it possible to increase the accuracy of the formation of the output pulse and carry out the conversion impulses that came simultaneously to several input buses, the duration of which may be less than the period of the clock frequency. 1 il.

Description

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The invention relates to a pulse technique and can be used in systems for processing and generating pulse signals.

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

The drawing shows an electrical functional circuit diagram of the device.

Duration converter them. pulse contains shaper I codes, elements OR 2 and 3 elements AND 4 and 5, accumulating adder 6, counter 7 pulses, generator 8 clock pulses, input tires 9 and output bus 10, with tire 9 connected to the corresponding inputs of the former I codes, the first the output of which is connected to the first input of the OR 3 element and the first input of the AND 5 element, and the remaining outputs to the corresponding information inputs of the Accumulating adder and the corresponding inputs of the OR 2 element, the output of which is connected to the recording input of the pulse counter 7 and ervym input AND gate 4, the output of which is connected to the C input of the accumulator 6, and the second input - to the output of the clock and a third input element, and 5, the output koto- cerned 1 is connected to a subtraction input

pulse counter 7, and the second input - with the output of pulse counter 7 and the second input element OR 3, the output of which is connected to bus 10 and the R input of accumulating adder 6, the outputs of which are connected to the corresponding information inputs of pulse counter 7,

The first input element And 5 is inverse, i.e. in the presence of a signal at this input, the element And 5 is closed, and in the absence of it works in accordance with the signals at other inputs.

The accumulating adder 6, on the leading edge of the pulse arriving at the clock input, adds to its content the code located at its information inputs. If there is no signal at the reset input, the accumulating adder 6 is in the zero position.

Pulse counter 7 is a subtracting counter. On the leading edge of each pulse fed to the subtracting input, one is subtracted from its content. With

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the presence of a signal at the input of the information record (WR) in counter 7 is recorded the code located at its information (D) inputs. At the output of counter 7 (this is the output of the loan — BR) there is no signal / there is a zero signal) if the contents of the counter is 0 and there is no pulse at the clock input.

The inputs of the shapers of the I codes are its address inputs; the block itself is constantly in the information reading mode. It is pre-recorded: a cell with the address 00 ... ... 00 code of the number 0, a unit is written in the first {low order of all steel cells, in the cell from the second to the n-th one is written:

cells whose address is one, for example, 00 ... 01, 010 ... O, code number 0;

in cells with two units in the address, for example, 00 ... 011, 1010 ... O, code number 1;

cells whose address is three units, for example OQ ... 0111, 10110 ... ... O, code number 2;

9 in the address of which n units of the code number (n-1).

Thus, the code generator performs the function of determining the number of pulses on the input buses and outputs a signal to its first output if there are at least one pulse on the tires, and the output of the second to the nth code gives the code of the number of pulses on the input buses 9, reduced by unit

Devices for converting the duration of the impuses works as follows.

In the initial state, when there are no pulses on the tires 9, the outputs of the code generator 1 are in the zero code, the pulse counter 7 and the accumulating adder 6 are in the zero position. At the output of the element OR 2 and at the output of the counter 7 pulses, there are zero signals that close the elements AND 4 and 5, respectively. If when the power is turned on, the counter- / cheek 7 is not in the zero position, then the element 5 is open, as at the output of the counter 7 pulses a single signal, and a pulse is output to bus 10, the duration of which corresponds to the code that appears in counter 7 when the power is turned on, after which the nejiexo device

It is reset. If it is undesirable to issue such a pulse, it is necessary to turn on the power supply to the reset input of the counter 7 when the power is turned on (the feed circuit of such a pulse is not shown).

When a pulse appears on one of the buses 9, a single signal appears only at the first output of the driver of the code 1 body. The signal from the first output of the driver 1 codes through the element OR 3 passes to the bus 10, on which the output pulse is formed. In addition, the signal from the first output of the shaper 1 codes additionally closes the element AND 5. At the output of the element OR 2, the zero signal remains in this case, the element AND 4 remains closed, the accumulator c 6 and the pulse counter 7 do not work. After the termination of this pulse on bus 9, the device returns to its original position, a pulse is sent to bus 10, the duration of which is equal to the duration of the input pulse from bus 9.

When pulses appear on two or more tires 9 srach u or when they appear on tires 9 second, third, etc. pulses during a pulse on one of the tires 9 at the moment when more than one pulse begins to act on the input buses 9, at the outputs of the shaper 1 codes from the second to the Nth (in the bits of the output code from the second to the nth) The code is the number of 9 PULS acting on the tires, reduced by one. At the first output of the driver 1 codes, a single signal appears if pulses appear on two or more buses 9 at once, or it remains if the pulse on only one of the buses 9 first acts. A signal appears on the first output of the driver 1 codes , similarly to the above, a signal appears at 10 Oin and element 5 is additionally closed. When a code other than zero is detected, the outputs of 1 code generator, starting from the second and to the nth, are outputted by a single signal the benefit of the element OR 2, the element opens AND 4 and the impulse The generator 8 starts to arrive at the clock input of the accumulating adder 6.

The signal from the output of the element OR 2 translates counter 7 into the recording mode

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formations and, as long as it is in effect, is permanently transferred to counter 7. the contents of accumulator 6 are overwritten, i.e. each time the contents of accumulating adder 6 change, the contents of counter 7 also changes. At the moment when the contents of counter 7 become different from zero, a single signal at its output prepares the opening element And 5, but And 5 remains a closed signal with first output shaper 1 codes.

Each pulse arriving at the clock input of accumulating adder 6 adds to its content a code located at the outputs of the shaper 1 of the codes from the second to the n-th. So, if at the outputs of the forcer 1 codes from the second to the nth, for example, the code of the number 2 G in this case, the pulses act on three buses 9), then after the first pulse received at the clock input, in the accumulating adder b there will be a number 2, after the second - the number 4, after the third - 6, etc., i.e. while tires 9 will have three pulses, the numbers 2 will be added to the contents of accumulating adder 6. When the number of pulses acting on tires 9 changes, but when the number of pulses acting on tires 9 more than one changes, the code at the bits of the code generator also changes 1 from the second to the nth, and then each pulse of the generator 8, arriving at the clock input of accumulating adder 6, adds to its contents a new code - decreasing by one unit the code of the number of pulses acting on the tires 9. So, if in the case described above disappears them pulse on one of the tires 9, i.e. There are two pulses left for them, then at the outputs of the former 1 codes from the second to the nth code the number 1 is present and then each pulse arriving at the clock input of accumulating adder 6 adds the number 1 to its contents. When the pulses disappear on all buses 9 , except for one, the code at the outputs of shaper 1 codes from the second to the nth disappears, therefore, the signal at the output of the element OR 2 disappears, AND 4 closes, counter 7 goes into the information storing mode, counter 7 is enabled

subtracting the input. In the accumulator accumulator accumulator, the pulse meter 7 contains the code of the sum of the common parts of the pulses acting on the tires 9. When the pulses disappear on all the tires 9, a single signal disappears and at the first output of the driver 1 codes, but on the bus 10 the single signal remains , since there is a single signal at the output of the pulse counter 7. Simultaneously with the disappearance of the signal at the output of the imaging unit 1, the element AND 5 opens and the pulses of the generator 8 begin to pass to the subtractive input of counter 7. Each of the impulses arriving at the subtracting input of counter 7 pulses subtracts one from its content. At the moment when you finish at the subtracting input of counter 7, the pulse that recorded the number 0, a single signal disappears at the output of counter 7, and the element 5 is closed and the signal at the output of element OR 3 disappears and on bus 10. The formation of a pulse equal to the duration of the sum of the durations of the pulses arriving at the bus 9 has ended. With the disappearance of the signal at the output of the element OR, the zero position of the accumulating adder 6 is established and the device returns to the initial state.

Suppose that on three tires 9, pulses with a duration of duration start to act at the same time, and where T is the period of the pulses of the generator 8, then from the moment these pulses appeared until the shortest pulse tt terminated, at the outputs of the imaging unit 1, the code 2 summed three times, i.e. at the moment the pulse t ends, accumulator 6 accumulates the number 6. From the moment pulse tj ends and until the pulse t ends, at the outputs of the former 2 codes from the second to the fifth, the number 1 is added twice to the accumulator accumulator 6, in which at the moment of the end of the pulse t the number 8 is written. From the moment of the end of the pulse g to the end of the pulse t at the outputs of the form

The code 1 coder, the second to the nth code, contains the code of number 0, in addition, the generator 8 pulses do not arrive at the clock input of accumulating adder 6, in which the number 8 is stored. B counters 7 from the moment the pulse ends 12 until the moment t ends There will also be a number 8. At the moment of the end of the pulse tg, the counter 7 starts working on the subtraction and a portion of the pulse of duration 8T is added to a pulse of 7T issued to bus 10 and, thus, a pulse of duration 1ST is output to bus 10, i.e. a pulse equal in duration to the sum of the durations of the pulses delivered to the tires 9.

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Claims (1)

Invention Formula A pulse width converter containing input buses connected to the corresponding inputs of the code generator, the outputs of which, starting from the second, are connected to the corresponding inputs of the first OR element, the output of which is connected to the first input of the first And element, the second input of which is connected to the output of the second pulse generator the OR element, whose output is connected to the output bus, the first input to the first input of the second element AND, and the second input to the output of the pulse counter, the subtracting input of which is connected ene yield the second AND gate, characterized in that, in order to increase the accuracy and resolution, it entered accumulator, whose data inputs are connected to respective inputs of the first OR gate, the input synchronization. tion - with the output of the first element And, R-input - with the output bus, and the output - with the corresponding information inputs of the pulse counter, the input of the entry code which is connected to the output of the first element OR, and the output - to the second input of the second element And, the first input which is connected to the first output of the code generator, and the third input is connected to the output of the clock generator.