SU531174A1 - Display device - Google Patents

Description

The proposed device is shown in the drawing.

The matching element 1, connected to the input of the device, is designed to convert the input signal levels into logical levels of the element base on which the device is made, and to match its load capacity.

The output of the matching element 1 is connected to the input of the HE element 2, which inverts the signal arriving at its input, and to the first input of the first trigger 3.

The output of the HE 2 element is connected to the first input of the second trigger 4. The triggers 3 and 4 are designed to memorize the "single (first trigger 3) and" zero (second trigger 4) signals (the device uses, for example, RS-triggers with inverse inputs).

The outputs of the triggers 3 and 4 are connected with the corresponding indicator elements 5 and 6.

The second inputs of the 3 n 4 flip-flops are connected to the switch 7 for switching the control signals.

The inputs of the switch 7 are connected to the sensor signals 8, which is designed to generate control signals: "single and" zero.

The device works as follows.

The input signal (for example, a constant logic level), passed the matching element 1, will go directly to the first input (setting "I) of trigger 3 and through the element NOT 2 - inverted to the first input (setting" I) of trigger 4.

Depending on the position of the switch 7, the device can operate in two modes: in the repeat mode and in the memory mode.

If switch 7 is in position (repeat mode) when the second inputs (setting "O) of both RS flip-flops with inverse inputs (flip-flops 3 and 4) receive a" zero control signal ", then at the outputs of flip-flops (direct output RS flip-flop with inverse inputs) the signals will be repeated with inversion to the signals arriving at the first inputs of the triggers. And since the signals at the inputs of the triggers are inverse to each other, then at the outputs of the triggers they will be inverse.

The indicator element 5 or 6, to which the "single level" will go on, will light up, and the other indicator element will not light up. By changing the input logic level, the gory indicator will go out and another will light.

If switch 7 is in the position (memory mode) when the second inputs (setting "O) of both RS-flip-flops with inverse inputs (flip-flops 3 and 4) receive a" single control signal, each of the flip-flops will be set

to the steady state corresponding to the "unit level at its output (direct output), when the trigger arrives at the first input (setting" 1) "of the zero logic level.

If there are successively variable logic levels in the controlled circuit, both triggers 3 and 4 successively store signals (each of them will receive a "zero level"), both indicator elements will light up and will light up to remove the memory mode, i.e. until switch 7 has been reset.

The control of signals using the proposed device is carried out as follows.

If there is a constant logic level in the monitored circuit, one indicator element is lit in both the repetition mode and the memorization mode.

If there are sequentially variable logical levels in the controlled circuit with a low porosity (such as "meander"), both indicator elements in a full wave heat up in the repetition mode and full light in the relaying memory.

If there are pulsed changes of logic levels in a controlled circuit with a short pulse duration and a high porosity, one indicator element is lit corresponding to the base of the pulse signal, in the repetition mode and both indicator elements are in the memory mode.

The use of the described device allows one to control all types of signals used in digital equipment, not to use for this purpose complex measuring instruments, and any points of the digital equipment circuits in dynamics - with real working signals.

Claims (2)

Invention Formula A display device comprising two indicator elements, one of which is connected to the output of the first trigger, a matching element and a switch connected to the signal sensor, characterized in that, in order to expand the application area of the device, it contains a second trigger and the PE element, and the output matching element is connected to the input element and to the first input of the first trigger, the output of the element is NOT connected to the first input of the second trigger, the output of which is connected to another indicator element, the second inputs ervogo and second flip-flops associated with the switch. Sources of information taken into account in the examination 1. Shigin A. G. “Digital computers, M., Energie, 1971, p. 113. 2. Guidelines for the construction of schemes of technical schemes of the EU EC computer equipment on integral s. 24 series 155, SCHKO. 005.068, 1970, Sxo3