RU1809420C - Clock and gate generator for control program unit - Google Patents

Abstract

The invention relates to program control, in particular to pure left program control systems. In order to increase the reliability of the generator containing the master oscillator, the output of which is connected to the first input of the OR element, the output of which is connected to the input of the clock forming unit, one output of which is connected to the input of the power amplifier, and the other to the output of the strobe separation pulse forming unit, the output of which connected to the input of the shift register, the second input of which is connected to the third output of the cycle forming unit, a trigger, a binary counter, the first and second elements 2 AND, element 3 AND, are introduced into it The first inputs of the first and second elements 2 And are the output forming the pulses of the fourth strobe of the shift register, the output of which forming the pulses of the first strobe is connected to the first input of the 3 And element, the second and third inputs of which are connected to the outputs of the binary counter, C-input which is connected to the output of the master oscillator, a R-input to the output of the trigger, S- and R-inputs of which are connected to the outputs of the first and second elements 2 AND, respectively, the second inputs of which are the outputs of the power amplifier, forming pulses of the third and second cycles respectively. 2 ill. (L C

Description

The invention relates to program control, in particular to numerical control systems.

The purpose of the invention is to increase the reliability of the generator,

The use of the invention allows to increase the reliability of the program control device with the increased computational cycle frequency that the software device can provide.

On Fig, 1 presents a structural diagram of a generator; in FIG. 2 is a timing diagram of a generator.

The clock and strobe generator for program control devices comprises a master oscillator 1 made according to the RC generator circuit, a clock generation unit 2, a power amplifier 3, a strobe separation pulse generating unit 4, a shift register 5, elements 2 AND, the first 6 and the second 7. trigger 8, binary counter 9, element ZI10. The output of the master oscillator 1 is connected to the C-input of the binary counter 9 and the first input of the OR element 11, the second input of which is connected to the output of the element ZI10, and the output to the input

00

oh oh

hO O

a clock forming unit i, one output of which is connected to the input of the power amplifier 3, the second one bypassing the strobe separation pulse generating unit 4, the output of which is connected to the input of the shift register 5, the other input of which is connected to the third output of the clock generating evil 2, and the forming outputs pulses of the first gate and the fourth gate are connected respectively to the first input of the element ZI 10 and to the combined first input of the first b and second 7 elements 2 And, the outputs of which are connected respectively to the S- and R-inputs of trigger 8, in the output of which is connected to the R-input of the binary counter 9, the outputs 2, 4 of which are connected respectively to the second and third inputs of the element ZI10. The outputs of the shift register 5, which generates pulses from the first to fifth gates and the outputs of the power amplifier 3, which generates pulses from the first to fourth cycles, are the outputs of the proposed clock and strobe generator, while the outputs of the power amplifier 3, which generate pulses 2m, 3m, are connected with the second, respectively, the second 7 and the first b elements 2 I.

The computational cycle of the generator consists of five gates. The computational cycles are separated by a machine reset pulse (MS), which starts at the trailing edge of the fifth gate (5CT 4T) and ends at the leading edge of the first strobe (1 CT 1T) of the next computational cycle.

In the practical implementation of the proposed generator, the generator circuit of the clock and strobe generator of the CNC system of the NZZ-2M type was finalized according to the proposed generator circuit.

The clock and strobe generator operates as follows.

The output signal of the master oscillator 1 through the OR element is fed to the input of the clock forming unit 2, in which the 1 T, 2T, 3T, 4T clocks are extracted (see Fig. 1.12-2.15 from the sequence of pulses generated by the master generator 1. Output signals node 2 of the formation of clock strokes through the amplifier 3 power is supplied to the input of the generator, and through node 4 of the formation of pulses of separation of the gates to the input of the shift register 5, forming the gates and the pulse of the machine reset (MS) (see Fig. 2.1). gate formation and shift register 5 is formed strobe pulses having duration on the leading edge of the first bar to the trailing edge of the fourth clock cycle (see, FIG. 1 pp 2.6-. And Fig. 2.7

page). They are separated by a strobe separation pulse that has a duration from a trailing edge of the fourth measure to a leading edge of the first measure. By 2T signal

4 of the gate (see Fig. 2.8), which is formed on the logic element 2 and 7, the trigger 8 is set to the zero state (see Fig. 2.3), whose inverse output resets the pulse counter 9 and prohibits its operation,

The transition of the trigger 8 to state 1 occurs according to the signal ST, 4CT (see Fig. 2.9), while through the element 2 AND 6 to the R-input of the counter 9 receives a low level signal, which

allows the operation of the counter 9, which produces a pulse count on the trailing edge of the pulses of the master oscillator 1 and provides a signal to the element ZI 10, which generates a signal of a unit level from

the leading edge of the first pulse of the driving generator 1, following after the MS signal, to the falling edge of the second pulse of the driving generator 1 (see Fig. 2.10). As a result, at the output of the OR element at the beginning of the computational cycle (after the passage of the MS pulses), a pulse with a duration of 3T is formed (see Fig. 2.11), where T is the frequency period of the master oscillator 1. This pulse corresponds to the pulse of art. 1 t. (See, Fig. 2.12), All other pulses of the computational cycle will have a duration of t / 2, Thus, a pulse of 1 tbsp. 1t, is formed on the element ZI 10 from signals mutually intersecting and thus excluding the possibility of occurrence of negative emissions in 1 tbsp. 1t

Claims (1)

The claims  A clock and strobe generator for programmable control devices (type NCD) comprising. RS-trigger defining a generator whose output is connected to the first input of an OR element, the output of which connected to the input of the clock shaping unit, the first output of which is connected to the input of the power amplifier unit, the second output of which is connected to the input input of the shift register, and the third to the input of the strobe separation pulse forming unit, the output of which is connected to the clock input of the shift register, and with the fact that, in order to increase reliability, the first, second and third elements And, a pulse counter, and the first inputs of the first and second elements And are connected to the first information output of the shift register, the second input of the first element And is connected to the first output of the lock power amplifiers, the second input of the second element And is connected to the second output of the block of power amplifiers, the output of the first element And is connected to the S-input of the RS-flip-flop, the output of the second element And is connected to the R-input of the RS-flip-flop, the inverse output of which is connected to R -input of the pulse counter, the C-input of which is connected to the output of the master oscillator, the first and second outputs of the pulse counter respectively, with the first and second inputs of the third AND element, the third input of which is connected to the second information output of the shift register, and the output of the third I element - with the second input of the OR element, the third, fourth, fifth and fifth information outputs of the shift register and the third and fourth the outputs of the power amplifier block are the corresponding outputs of the generator. Fig.2 ..