SU1441466A1 - Pulse shaper - Google Patents

Abstract

The invention can be used in automation devices and computer equipment, in particular in stands for testing and tuning logic blocks. The purpose of the invention is to expand the functionality. The shaper contains the elements NOT 3 and the elements AND-NOT 5 and 6. The introduction of the key 1, the divider 2 voltage, the element NOT 4, the one-shot 7, including the elements AND-HE 8 and 9, the element NOT 10 and the integrating element II, and processing New functional connections allow the formation of an output pulse on the negative and positive edges of the input signal. 2 Il.

Description

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The invention relates to a pulse technique and can be used in automation and computing devices, in particular in stands with for checking and adjusting logic blocks and in measuring digital devices.

The purpose of the invention is to expand the functionality of the shaping pulses.

FIG. 1 shows a functional diagram of a pulse former; Fig. 2 shows timing diagrams for his work. 15

The pulse shaper contains key 1, voltage divider 2, elements NOT 3 and 4, elements AND-NOT 5 and 6, one-shot 7, consisting of elements AND-NOT 8 and 9, element 10 and integral 20 11, the input bus 12, the output bus 13, the key 1, the divider 2, the element NOT A and the element AND-NOT 6 are connected in series, the input bus 12 is connected to the 25 first input of the element AND-NOT 6 and through the element NO 3 is connected to the first the input element AND-NOT 5, the second inputs of the elements AND-NOT 5 and 6 are connected respectively to the input and output of the element 30, NOT 4, the outputs of the elements AND-NOT 5 and 6 are connected to the inputs of the one-shot 7.

The pulse shaper works in the following way. 35

The selection of the required front of the input pulse along bus 12, over which a short pulse should occur, is made by setting the logical level at the input of the HE 4 element using key 1 and divider 2. The logic zero level ensures the formation on the output bus 13 a short pulse on the positive front (the difference from 45 O to 1) of the input signal on the bus 12, and the logic level 1 - on the negative front (difference ns 1 in O). As key 1, logic block 50 can be used (except for the toggle switch), which ensures the formation of the required level depending on the input conditions.

In the case of the formation of the output pulse on the negative front 55 of the input signal, the setting unit potential flows through key 1 and divider 2 to the input of the element HE 4

(fng, 2.1a) n one of the inputs of the element AND-NOT 5, which allows the input signal to pass through it via bus 12 (Fig. 2.1 c), inverted by the element NOT 3 (Fig. 2.1 g), to the input of the element I- NOT 8 one-shot 7 (figure 4. 1D). At the other input of the element IS-HE 8 at this moment there is a single permissive level from the output of the element IS-NOT 6 (FIG. 2 1e), which is due to the presence of a zero signal on one of its inputs, which came from the output of the HE 4 (FIG. 2.16). A single vibrator 7 generates an output short pulse of a certain duration (Fig. 2.1g), which can be controlled within certain limits by selecting the parameters of the integrating element 11. The single vibrator is triggered by the negative edge of the pulse at the input of the NAND element 8. In the case of forming the output pulse on the positive front the operation of the element AND-NOT 5 is prohibited by the zero level of the key 1 through the divisor 2 (FIG. 2, 11a), and the operation of the element AND-NOT 6 is permitted by the unit level from the output of the element NOT 4 (FIG.). The input signal passes through the AND-NE 6 element (Fig.2OPE), is inverted by it and on the negative front of this inverted signal, which corresponds to the positive front of the input signal, initiates the one-shot 7, which forms a short pulse (Fig.2.11) .

Claims (1)

Invention Formula The pulse shaper containing the first and second elements AND-NOT is the first element NOT, the input and output of which are connected respectively to the first inputs of the first and second elements AND-NOT, the input bus is connected to the input of the element NOT, it is different from ayushi and In order to expand its functionality, a key connected in series, a voltage divider and a second element NOT, a one-shot are entered into it, the first and second inputs of which are connected to the outputs of the first and second elements AND-NOT, the second inputs of which are connected respectively and to the input of the swing of the second element You are a NOT rovibratora single-output is connected to an output bus I Of J d e Well n . 2