SU1029407A2 - Pulse width discriminator - Google Patents

Abstract

SELE1SGOR PULSES BY DILT1: AST according to author. sv; M; 617828,; About: With the purpose of increasing the accuracy, by means of determining the absolute value of the distortion of the duration of the pulse and the average of the distortion of the duration of the pulses in a pack, a counter is connected in series with the first unit $ developer analogue and workman ,. as well as the second analog converter 4: one, while the outputs of the second and first elements I are connected respectively to the input of the second converter and the input to the threshold unit, the second output of which is connected to the additional input of the main pulse generator and the input of the counter, the output of which with the second (th input divider.

Description

This invention relates to electro "n1. connection and can be used to control the distortion of pulses in systems for transmitting discrete information. On the basis of auth. St. No. 617828 is known a pulse selector with a duration that contains the first pulse shaper, the first element I, the first input of which is connected to the input bus and to the input of the first impulse driver, the second element And, the second pulse shaper, the output of which is connected to the second input of the first element And the first input of the second element is And, the long element is And, the first input of which is connected to the input bus, the second input is with the output of the first pulse generator and the second input of the second element And, and the output is with the input second shaper HMnyjibcoB, wherein the output of the second AND element is connected to the control input of the first pulse shaper 1. However, the known selector does not provide a determination of the absolute value of the searched for the duration of a single pulse and the average value of the distortion of the pulse duration in a pack. The aim of the inventions is to improve the accuracy of selection by determining the absolute value of the distortion of the length of the OD1SH pulses and the average value of the distortion of the duration of the pulses in a pack. The goal is achieved by the fact that the pulse selector has a long containing first pulse shaper and an additional AND element sequentially connected and a second pulse shaper whose output is connected to the first input of the second element AND whose output and second input are connected respectively. the input and output of the first pulse generator, whose input is combined with the first inputs of the first and additional elements. And, the second inputs of which are connected to the first inputs of the second element I, a counter is inserted, the threshold block connected in series, the first converter analogue code and divider, and the second converter .Analog code, and the outputs of the second and first elements AND are connected respectively to the input of the second the analog-code converter also with the input of the threshold unit, the second output of which is connected to the auxiliary input of the second pulse shaper and the input of the counter, the output of which is connected to the second input of the dividers, FIG. 1 One is a structural electrical circuit of the proposed selector; Fig. 2 shows diagrams explaining his work. Pulse selector by duration contains the first 1 and second 2 pulse shapers, an additional element And 3, the first -4 and second 5 elements And, the threshold unit 6, counts 7, the first 8 and second 9 converters, analog-4SOD and divider 10, Pulse selector the duration works as follows. For example, a pulse arrived at the selector input, the duration of which is less than the etalo Shoy (Fig. 2a). With its arrival at the output of the imaging unit 1, a reference pulse appears (FIG. 26) allowing the input pulse to pass to the output of the AND 3 element. After the pulse decay (FIG. 2c) the output of the I3 output of the output 11T starts the imaging generator 2, of which the reference pulse (fig. 2d) is fed to the inputs of elements 4 and 5, with the output signal of element –I 4 appearing zero (fig. 2e) and at the output of element 5, a single signal (fig 2d) whose duration shows how much the input signal is shorter than the reference one. Further, this 1-P51y signal from the output of the element And 5 is fed to the input of the transducer 9 analogue-chcode and the control input of the driver 1. When this pulse decays, the initial state of the driver 1 is returned. which represents in digital form the magnitude of the decrease in pulse duration, as compared with the reference one. If a long pulse arrives at the selector input (FIG. 2a), then a pulse appears at the output of shaper 1 (FIG. 26), with the duration of which the input pulse is compared. At the output of element 3, an impulse appears (fig. 2c), the decay of which starts. Shaper 2, from the output of which the reference impulse arrives, at the inputs of elements 4 and 5, and at the output of element 5 the zero signal appears and at the output of an AND 4 element there is a single signal, the duration of which shows how much the duration of the INPUT 01X signal is greater than the reference one. From the output of the element And 4, this single signal is fed to the input of the porous block 6,

Threshold block 6 works in a specific way ..

If its input, signals

greater than or equal to a span, then. at its first output, there appears a zero signal, and at the second output, a short unit impedance. If the input signal of the threshold block 6 received a signal whose duration is less than the reference one, the signal passes to its first output, and a zero signal is present at the second output. In this case, the signal passes to the first output of the threshold unit. 6, a zero signal is present at its output. From the first output of the threshold block 6, the signal arrives at the output of the converter 8 of anag1og-: od, which converts the signal into the corresponding code combination. The code combination from the converter 8 analogue-code is fed to the input of the divider Y. Simultaneously from the output of the counter 7. The unit is permanently recorded in it arrives at. input, divider 1O, which divides the code combination into units, and at the output of the selector, a code combination appears, which is in the form of digital form.

momentum.

If, however, a packet of elongated pulses arrived at the input of the euppector, then the analyzer allows us to determine the average increase in the duration of each pulse by, j, compared to the reference pulse.

For example, three elongated pulses arrived at the input (Fig. 25). With the arrival of the first at the output of the former, a pulse appears (Fig. 26). At the output of element 3, a pulse appears (fhgg. 2c), the decay of which starts shaper 2, from the output of which the reference pulse arrives at the input of elements 4 and 5, and at the output of the element i 5 appears a zero signal and the output signal of the 4th element - the output signal of the reference duration, which is fed to the input of the threshold unit 6, the first output of the threshold unit 6 is a zero signal, and the second output is a short unit mvIpyls (Fig. 2) which enters the additional (control) input of the driver 2 and the input of the counter ka 7. Counter 7 counts the pulse, and the former 2 restarts, and from its output the pulse of the reference duration arrives at the inputs of the AND 4 and 5 elements, where the output signal of the AND 5 element is a zero signal and the output of the AND 4 element is a single signal the reference duration, which is fed to the input of the threshold unit 6. At the first output of the threshold unit 6, the zero signal appears again, and at the second output - a short single pulse that arrives at the auxiliary input of the imaging unit 2 and at the input of the counter 7. momentum and form The transmitter 2 is restarted again, and from its output a pulse of the reference duration arrives at the inputs of the AND 4 and 5 elements, where the output of the AND 5 element appears a zero signal, and the output of the AND 4 element produces a single signal that arrives at the input of the threshold block 6 Since the duration of this single signal is already shorter than the reference one, then at the second output of the threshold block 6, the zero sniff appears | and on the first output there is the same single signal, which is fed to the input of the converter 8 analog-code, where it is converted into a corresponding code combination. The code combination from the output of the converter 8 is analog- од one post to the input of the divider 10.

Counter Counts two pulses, but its initial state is single, so the triplet in the received system from the output of the counter U goes to the second input of the divider Yu, which divides the code combination into three. At the output of the selector, digital information appears in the form of a code combination about the average increase in the duration of each three short pulses compared to the reference duration, followed by a counter. 7 returns to the original unit state.

Technician: The o1-economic efficiency of the invention is to determine the digital form of the absolute value of the distortion of the duration of a single impulse, as well as the average magnitude of the distortion of the duration of each pulse from the packet.

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Claims (1)

PULSE SELECTOR DURATION for ed. St. No. 617828, characterized in that, in order to increase the accuracy of the selection of the put, the detector has the input of the second pulse shaper and the input of the counter, the output of which is connected to the second input of the distortion duration of single pulses and the average value of distortions of the pulse duration in the packet, introducing a counter, a threshold block connected in series, a first analog-to-code converter and a divider, and also a second analog-to-code converter, while the outputs of the second and first elemen- And are connected respectively to the inputs of the second an analogue of the educator — and with the input of the threshold block, the input of which is connected to an additional