SU651483A1 - Pulse counter with visual indication - Google Patents

Description

The invention relates to a pulse technique, can 6biTii used in digital measuring devices for various purposes with a visual indication of the measurement results.

There are counters with a visual indication of the result of the counting on digital decimal boards, which have the property of quenching insignificant1, their zeros in the higher digits, containing controllable keys in the common electrode circuit of the digital decimal table 1.

These counters are constructed according to a complex scheme.

Closest to the proposed counter, which contains counting decades with decoders, the outputs of which are connected to the entrance of the indicator boards, and the keys of the damping of the transistor, the bases of which are connected to the logical circuit of the damping, and the collectors - with the electrodes of the indication boards 2.

This device is tricky.

The purpose of the invention is to simplify the device.

The goal is achieved by the fact that in the counter containing sequentially connected counting decades with decoders, the outputs of which are connected to the inputs of decimal indication boards, and transistor blanking keys, the zero output of the decoder in each bit is connected

with one of the control electrodes of the transistor switch quenching and c. the first input element And, the output of which is connected to the second control electrode of the transistor switch of the neighboring younger digit, and with the second input of the element And the neighboring junior discharge. The number of radio elements needed to build such a quench circuit is less than what is known.

When using a quench key in the zero electrode circuit of the scoreboard, the collector of the transistor is connected to the zero electrode of the scoreboard, the zero output of the decoder to the emitter of the transistor and through element I to the base of the transistor of the next younger decade, the second input of the element to the base of the transistor of its decade.

Claims (2)

FIG. 1 shows a variant of a counter circuit with a key damping in a common electrode circuit; FIG. 2 - a variant of the scheme with a key in the zero electrode circuit of the board. in fig. 3 - a variant of the circuit with the use of logical integrated circuits npHMetrcHHfl. The counter consists of counting decades 1, indicator boards. 2, the transistor keys of the quench 3, the decoders 4, and the AND elements (gates) 5. The meter operates as follows. Consistently included counting decades of counting the number of input pulses. The counting results are represented as a low level at one of the outputs of each decade, and there are 2 highlights on the elements of the scoreboard. the corresponding signs of decimal digits. If the zero states have higher bits, the And 5 elements are open and prohibit the connection of the zero state indicator of the next low-order bit. The invention of the Pulse Counter with a visual indication, containing successively connected counting decades with decoders, the outputs of which are connected to the inputs of decimal indication boards, and transistor blanking switches, characterized in that, in order to simplify the device, the decoder's zero output in each digit is connected to one of the control electrodes of the transistor key of quenching and with the first input of the element I, the output of which is connected to the second control electrode of the transistor key of the neighboring junior with the second input of the element And the next junior discharge, Sources of information taken into account during the examination 1. The author's certificate of the USSR oVo 430510, cl. H 03 K 23/02, 1974. 2. Radio Fernseheu Elektronik, 1973, H 23, p. 783. NA 1 t 5 6 7 8 3 О -db