The time selector pulses

 

(57) Abstract:

Usage: in the pulse technique for time coordination of signals in the device time information processing. The inventive temporary selector pulses includes first, second, N-th elements 1 AND1121Nthe first 2, the second 5 elements OR, the one-shot 3, the first, the second, N-th delay line 41424Nthe pulse generator 9, the reversible counter 10 pulses, bus 6 strobing signal, the bus gate 7 of the counter output bus 8, the output code bus 11 with corresponding connections. 1 Il.

The invention relates to radio engineering, in particular to pulse technique can mainly be used for temporary approval of the signals in the devices of temporal information processing.

The closest in technical essence to the present invention is a time selector pulse containing N elements, And N delay lines, the first and second elements OR, the one-shot (ed.St. USSR N 1732448, CL N 03 To 5/19, 1989). The first input of the first element And connected to the bus strobing signal and the second input with the output of the first element OR the first input connected to the bus strobilus and the input of one-shot, the output of which is connected to the first input of the second element And the outputs from the second to the (N-1)-th elements And are connected respectively to the first inputs of the third to N-th elements And with the inputs corresponding to the second through (N-1)-th delay lines, and the second inputs of the second through N-th element And connected to respective outputs of the first delay line and the output of the N-th element And connected to the first input of the second element OR the inputs of which the second through N-th connected respectively to outputs of the second through N-th delay line and the output of the second element OR is connected to the output bus.

The disadvantage of this selector is the absence at its output the information about the mutual position on the time axis strobing and the gate of the input pulses, which limits the functionality of the selector and cannot be used, for example, as a temporary discriminator in automatic tracking frequency or repetition period strobing pulses (pulse witness the measuring range, the system locked loop pulse generators, etc).

The aim of the invention is the possibility of the formation at the output of the selector code, the magnitude and sign of which Opredelenie capabilities of the selector.

The objective is achieved by the fact that in the time selector pulses introduced the pulse generator, the output code bus and reversible pulse counter whose outputs are connected to the output code bus, a reset input and a gate input connected to the output of the second element OR the input mode setting account with the output of the nth delay line, and the counter input with the output of the pulse generator.

The introduction to the operation of these elements allows you to convert a time interval from the leading edge gate pulse to the middle of the strobing pulse in the binary code corresponding to the number of pulses generated by the generator during this time interval or a time interval equal to the duration of the strobing pulse.

The drawing shows a functional diagram of the proposed selector pulse.

It contains the first 11the second 12N St 1Nelements And the first 2 element OR, one-shot 3, the first 41the second 42N-s 4Ndelay line, the second 5 element OR bus 6 strobing signal bus 7 gate signal output bus 8, the generator 9, the reversible counter 10 pulses, the output code bus 11. The first input element AND 11with the bus 7 gate signal and the input line 41delay, and the first input with the output element AND 11inlet line 4Nthe delay and the input of one-shot 3, the output of which is connected with the second input element AND 12. The first inputs of elements AND 12,13,1Nconnected respectively with the first(N-1)-th output line 41delay. The outputs of the elements 1 AND2,13,1N-1connected respectively to the second inputs of elements AND 13,14,1Nand the inputs on lines 42,43,4N-1delay. The output of the element 1 ANDNconnected to the (N-1)-th input element OR 5. The first, second,(N-2)-th inputs of the OR element 5 are connected to the outputs of the second, third,(N-1) th delay lines. The output of the nth delay line connected to the N-th input element OR 5 and the input mode setting account "+/-" of the counter 10, the outputs of which are connected with the output code bus 11. The counting input of the counter 10 is connected to the output of the generator 9, and its gate input U and the reset input R connected to the output of the OR element 5 and the output bus 8 device.

The mode of operation of the inverse of the counter 10 sets the logic level at the input " + "and" -": if there is a logical "1", the subtraction, if a logical "0"-summation. When it arrives at the reset input R of the leading edge of the pulse position is input, permitted in the presence of level "1" at its gate the input U.

The device operates as follows.

The pulse from bus 6 strobing signal arrives at the first input element AND 11and on input line 41the delay on each output of which is formed impulse, which is equal to the length of the input, but delayed by the value of i x tmin(i the number of the output of the delay line; tminthe time delay between adjacent outputs), the pulse from bus 7 gate signal at the first input of item OR 2.

If strobing pulse is completely overlapped by the gate or comes later gate, but partially overlaps with him, due to the connection between the output element AND 11and a second input of item OR 2 to the output element AND 11is formed a pulse equal in duration strobing, which is fed to the input of the start of the one-shot 3 through line 4Ndelay element OR a 5 comes on the output bus 8 device, the reset input R and the gate input U of the counter 10. Thus the cutting edge of the incoming pulse, the counter is reset and before the arrival of the trailing edge of this pulse operates in the subtraction mode, since the input mode setting account "+/-" prismtm "-" code on the tire 11 of the device. The decimal equivalent of the binary code corresponds to the number of pulses received on the even-numbered input With counter 10 for a time equal to the duration of the strobing pulse, indicating that the leading edge of the strobe comes at the same time or before the leading edge strobing pulse. The pulse generated at the output of the one-shot 3, is supplied to the second input element AND 12. On the first inputs of elements AND 12AND 1Ndo delayed pulses from the corresponding line 41delay. The signal output elements AND 12,1Nno due to the links between the outputs of the elements 1 AND2,1N-1and second input elements AND 13,1Nrespectively.

If straberry pulse comes before the gate, but partially overlaps with him, at the time of coincidence of these pulses at the output of the element 1 AND1formed impulse, which is equal to the length of time overlap. This pulse is fed to the input of the start of the one-shot 3 and to the input line 4Ndelay. The delayed pulse output of the delay line 4 is supplied to the N-th input element OR 5 and the sign "+/-" of the counter 10, providing a subtraction mode. The momentum of create,1Ndo delayed pulses from the corresponding line 41delay. At the output elements AND 12,1Npulses with a duration ( pulse duration at the output of the one-shot 3), which receives on the input lines 42,4N-1delay. Delayed pulses from the outputs of the lines 42,4N-1delays come respectively to the inputs 1,(N-2) item OR 5 (N-th)-th input of which receives a pulse from the output of the element 1 ANDN. Since the times of the delay lines 42,4Ndelays are selected from the condition tass.i(N-1) x tmin, tass.N=(N-1) x tmin(i i,N-1); tass.ithe delay time of the i-th delay line: tass.Nthe delay time of N-th delay line; tminthe delay pulse between adjacent output lines 41delay), the result of a disjunction pulses on all the inputs of the OR element 5, an output bus 8 device is formed by a pulse whose duration is equal to the duration of the strobing pulse. Output the generated pulse is also fed to the reset input R and the gate input U of the counter 10. Thus the cutting edge of the incoming pulse, the counter is reset and prior to the entry "+/-" pulse from the output of the lia actions of the pulse at the output of the element OR 5, consequently, on the output bus 8 device. As a result, the pulse on an output bus 8 is accompanied by a binary code bus selector 11. The decimal equivalent of the binary code corresponds to the number of pulses generated by the generator 9 for the time interval from the leading edge gate pulse to the middle of the strobing pulse. The sign of the code depends on which side on the time axis from the middle of the strobing pulse is located forward of the front gate.

If strobing and Gating pulses do not overlap, the pulses at the outputs of the element AND 11, the one-shot 3, items 1 AND2,1Nand , consequently, on the output bus 8 are missing, which provides a selection of strobing pulses. On the code bus selector 11 is stored, the code generated in the previous step.

The proposed device allows in contrast to the prototype to generate binary code, the magnitude and sign of which are determined by the relative position in time Gating and strobing pulses that extends the functionality of the selector.

The TIME SELECTOR PULSE containing N elements, And N delay lines, the first and second elements And the first element OR first input connected to the bus strobe signal and the input of the first delay line and the second input with the output of the first element And the input of the N-th delay line and the input of one-shot, the output of which is connected to the first input of the second element And the outputs from the second to the (N-1)-th elements And are connected respectively to the first inputs of the third to N-th elements And inputs corresponding to the second through (N-1)-th delay lines, and the second inputs of the second through N-th element And connected to respective outputs of the first delay line and the output of the N-th element And connected to the first input of the second element OR the input of which is from the second to the N-th connected respectively to outputs of the second through N-th delay line and the output of the second element OR is connected to the output bus, characterized in that it introduced the pulse generator, the output code bus and reversible pulse counter whose outputs are connected to the output code bus, the reset input and gate input connected to the output of the second element OR the input mode setting account with the output of the nth delay line, and the counter input with the output of the pulse generator.

 

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