SU1450094A2 - Pulser - Google Patents

Description

eleven

01

with

i4

1

; The invention relates to a pulsed technique, can be used in electronic devices to generate a specified number of pulses on the front and fall of the input signal and its selection over a duration | - Nosti is an improvement of the generator of impulses according to ed. St. 8 1322439.

The aim of the invention is to increase the noise immunity of the device 1 | When generating a predetermined number of dTBa pulses by the decay of the input signal. .. I Figure 1 shows the structural diagram of the pulse generator j in Figure 2 and timing diagrams explaining its operation.

The pulse generator contains elements EXCLUSIVE 1–1 OR 1-3, element 4

Supports, counting triggers 5-7, counting to 8, element AND 9, element OR NOT O, input bus 11, output buses 2 and 13.

 The first input of the EXCLUSIVE flash 1 is connected to the R-input of the counting t - trigger 5, the second input is connected to the direct output of the counting trigger 5, and the output f of the input of the delay element 4, the first stroke of the EXCLUSIVE IfflH 2 is connected to the output of 4 delays, the second input - with the direct output of the counting trigger 5, and the output - with the C input (Accounting.-trigger 5, the first input of the EXCLUSIVE OR 3 element is connected to the inverse output of the counting trigger 6, the second input - with the output of the element And 9 and C-input of the counting trigger 7, and the output - with the second input of the element YLI-NOT 10, C-input of the counting t rigger 6 is connected to the output of the counter 8 and the first input of the IPI-NE element 10, and the output is connected to the output bus 13 and the R-input of the counting trigger 7, the C-input of the countercircuit 8 is connected to the forward output of the counting trigger 6 and the output bus 12, and the R-input is connected to the output of the element SHS-HE 10 and the R-input of the counting trigger 5, the inverse output of the counting trigger 7 is connected to the first input of the element 9, the second input of which is connected to the input bus 11.

The pulse generator works as follows,

In the initial state, in the absence of a single signal on the input bus 11 (the circuit for setting the counting trigger 6 to the zero state is not

Q Q s

five

0

Kazan) .. at the direct output of the counting trigger 6, the zero level, which blocks the operation of the counting trigger 7, as a result, from its inverse output to the first input of the element And 9 a single signal is received, allowing control signals to pass from the input bus 11, at the output of the element And 9 is the zero level, at the inverse output of the counting trigger 6 there is a single level, as a result, at the output of the element EXCLUSIVE RSHI 3 a single signal, at the output of the OR-NOT 10 element, the zero level, which Vki in About the counter 8 and the counting trigger 5 blocks their work. On the output tires 12 and 13 devices zero levels.

When a control signal arrives on bus 11 (FIG. 2, pos. I, k) a high level, the duration of which must be no less than the counting time of counter 8, it passes through AND 9 and enters the input of EXCLUSIVE OR 3 (FIG. 2 ,, pos. At the output of the element EXCELS OR 3: a zero level is created (FIG. 2, pos. 1, c), which is set at the output of the OR-NOT 10 element (FIG. 2, pos. 1, d) allowing the operation of the counting: trigger 5 and counter 8. The same unit level from the output of the element OR NOT 10 - successively passes through the element nty EXCLUSIVE OR 1 (figure 2, pos.1, d), delay 4 (figure 2, pos.1, e), EXCLUSIVE OR. 2 (figure 2, pos.1, g) and, entering the input synchronization of the counting trigger 5, establishes at its direct output a single level (FIG. 2, pos. 1, 3), which affects the inputs of the EXCLUSIVE OR 1 and 2 elements, sets their outputs to zero levels. Zero level from the output of the EXCLUSIVE element OR 1 through the delay element 4 enters the input of the EXCLUSIVE OR element 2, setting a high level at its output, which forms at the direct output of the counting trigger 5 zero Level laying output IS1SHOCHAYUSCHEE rsi element 1 a high level, which passes through the delay element 4, the exclusive-OR 2, and sets the counter trigger 5 in a single state, and then the process of generating impulsbv

the front of the input signal continues. After a certain number of pulses, the counter 8 generates a single signal (Fig. 2, pos. II, i), which, passing through the IPI-HO 10 element (Fig. 2, pos. II, d), zeroed the counter trigger. 5, the counter 8 and sets on the direct output of the counting trigger 6 a unit level (FIG. 2, pos. II, k), which enables the operation of the counting trigger .7.

The zero level from the inverse output of the counting trigger 6 (FIG. 2, no3.II ,;) establishes a single level at the output of the EXCLUSIVE OR 3 element (FIG. 3, pos. II, c), which through the element STI-HE 10 (FIG. 2, pos. T1, d) blocks .pafioiy of the counting trigger 5, counter 8 until the end of the input signal.

 On the decline of the input signal (Fig. 2, pos. III, q), at the output of element And 9, a zero level signal appears (Fig. 2, pos. III, 6), which sets the zero level on the inverse output of the counting trigger 7 (Fig , 2, pos. III, m), which prohibits the passage of impulse noise through an element And 9 during the projection of its duration (figure 2, pos. III, 5).

At the output of the EXCLUSIVE OR 3 element (Fig. 2, pos. Ill, 5), a zero level signal appears, which is inverted by the element OR-NOT 10 (Fig. 2, pos. III, d), enables the operation of the counting trigger 5, the counter 8 and, entering the input element EXCLUSIVE OR 1, causes the formation of a specified number of pulses at the output of the counting trigger 5 in the same way as in position 1 (figure 2, position 110).

After a certain number of PM pulses, the counter 8 generates a pulse (FIG. 2, POS. III, and), which has zeroed the counting trigger 5, a counter 8 and sets on the direct output of the counting trigger 6 (FIG. 2, POS. III, to ) zero level that blocks work

counting trigger 7, installed on its inverse output a single signal (FIG. 2, POS.III, L), thereby g allows the input signal to pass through AND 9 element. The unit level from the inverse output of the counting trigger 6 (FIG. 2, POS. III, from) sets, at the output of the EXCLUSIVE Element, BELOW OR 3 unit level (FIG. 2, pos. III, b), which through the element OR-NOT 10 (FIG. 2, pos. IIIi) blocks the operation of the counting trigger 5, counter 8 , the device is set to 5 seconds.

On the output bus 12 a predetermined number of pulses is generated on the front and decay of the input signal (FIG. 2e), moreover, if the input signal duration is less than the counting time of the counter, then on the output bus 13 there is a zero level, which allows using the proposed device for selection of impulses with a duration longer than a given program (figure 2k).

The frequency of the generated pulses depends on the speed of the element base on which the generator is assembled and

0 can be controlled by a delay element.

Claims (1)

Invention Formula Pulse generator auth. St. No. 1322439, I differ from the fact that, in order to increase noise immunity when generating a given number of impulses by decay the input signal, the element I and the third counting trigger, the R-input of which is connected to the direct output of the second counting trigger, and the C-input - with the BTopfcif-i input of the third element EXCLUSIVE 1E OR, and the output is connected to the first input of the element AND, the second input of which is connected to the input bus, and the output is connected to the second input of the third element EXCLUDING 1EE OR.