SU1075416A1 - Counting device storing information in non-volatile mode - Google Patents

Abstract

ACCOUNTABILITY WITH NON-DEPENDABLE: INFORMATION,. containing trigger cells, made on remote switches and two: key elements, triggering key and driver, the output of which is connected to the switching contact di; station switch of the first | Trigger cell, the first input of the driver is connected to the negative power bus, the second input to to the output of the triggering key, the switching contact of the remote switch of each subsequent trigger cell is connected to the make contact of the remote switch of the previous cell, distinguishing This is because, in order to improve noise immunity, a voltage divider is included in it between the minus and plus power buses, to the midpoint of which the input of the triggering key is connected, in each trigger cell each key element is made on a single junction transistor connected to the first output winding of the remote switch, the first base to the mine power bus, the second bases of the first and second single junction (L transistors, respectively, with the opening and closing contacts switches and through resistors - with a positive power bus, with the second terminals of the windings of the remote switches connected to. exit trigger key. sl 42

Description

The invention relates to a pulse technique and can be used in various devices of discrete automation.

A binary counter with non-destructive information containing trigger cells made on two-winding relays with self-holding thyristors and diodes ll is known,

The disadvantage of the meter is low noise immunity.

The closest in technical essence to the invention is a counting device with non-destructive information, containing trigger I cells made on remote switches and key elements, starting a key and a driver, the output of which is connected to the switching contact of the remote switch of the first trigger cell, the first input of the driver is connected to the minus power bus, the second input - to the output of the trigger key, the switching contact of the remote switch of each subsequent trigger A separate cell is connected to the break contact of the remote switch of the previous cell C J-Disadvantage of the known device is the low noise immunity due to the use of thyristors in it, which have relatively small values of voltage and operation current.

The aim of the invention is to improve noise immunity.

The goal is achieved by the fact that. into a counting device with non-destructive information containing trigger cells made on remote switches and two key elements, triggering key and driver, the output of which is connected to the switch contact of the remote switch of the first trigger cell, the first input of the driver is connected to the negative power bus, the second input is to the output of the triggering key, the switching contact of the remote switch of each subsequent trigger cell is connected to the closure contact of the remote preceding cell switches between negative and positive supply rails including Delhi; Tel voltage to a midpoint connected hotorogo trigger input key, in each cell, each trigger key element formed on odnoperechodnom transistor whose emitter is connected to a first terminal of the winding remote switch. the first base has a negative power bus, the second bases of the first and second unijunction transistors are respectively opener and make contacts of remote switches and via resistors are connected to the positive power bus, while the second terminals of the windings of the remote switches are connected to the output of the triggering key.

The drawing shows a schematic diagram of a counting device with non-destructive information.

The proposed device contains trigger cells 1-1, 1-2 ,,, .ln, made on remote switches 2 and two key elements made on a single-transition transistor 3 each, triggering key 4 and driver 5, the output of which is connected to the switching contact 7 remote switch

2 of the first trigger cell, the first input 8 of the driver 5 is connected to the negative power bus 9, the second input 10 - to the output 11 of the trigger

I key 4, the switching contact 7 of the remote switch 2 of each subsequent trigger cell, is connected to the closing contact 12 of the remote switch 2 of the previous cell, between the target and positive buses 9 and 13 of the power supply, the voltage divider 14 is connected, to the midpoint 15 of which input 16 is connected of the trigger key 4, in each trigger cell 1-1,., .- n, each key element 3 is made on a single junction transistor, the emitter of which is connected to the first terminal of the winding of the remote switch 2, the first base is with the minus bus 9 power, the second base of the first and second unijunction transistors 3, respectively, with opening and closing contacts 17 and 12 remote switches and through resistors 18 with positive bus 13 power, while the second terminals of the windings of remote switches 2 are connected to output 11 of the triggering key 4

The device works as follows.

When the trigger key 4 is first closed, the voltage from the output (middle point 15) of the voltage divider 14 is applied to the windings of the remote switches 2 and to the driver 5.

The value of the voltage at the output of the divider is chosen less than the threshold. Of the operation of the unijunction transistors, so that the latter remain in the closed state.

From output 6 shaper to the second base of the unijunction transistor

3 first cells 1-1 through contacts

7 and 17, a negative polarity pulse is received with a duration less than the response time of the remote switch 2. The potential of the second base decreases briefly, and the unijunction transistor 3 triggers and is subsequently held

in the open state, due to the current flowing through the left winding of the remote switch 2, the larger switching current of the transistor 3. The remote switch 2 of the cells 1-1 operates and closes its contacts 7 and 12.

After the release switch 4 is opened, the open single junction transistor 3 cells is closed, the virgin winding of the remote switch 2 of the first cell 1-1 is de-energized, and the driver 5 returns to its original state.

When the trigger switch 4 is re-closed, the right and left unijunction transistors 3 of the first and second cells 1-1 and 1-2 are turned on, respectively. The remote switch 2 of the second cell 1-2 is activated, and the first cell 1-1 returns to the initial state.

Upon subsequent closure of the trigger key, the device operates in the same way.

The technical and economic effect of the invention is to improve the noise immunity of the device.

Claims (1)

NON-DESTRUCTIVE ACCOUNTING DEVICE: INFORMATION | containing trigger cells made on the remote switches and two key elements, a trigger key and a driver whose output is connected to the switching contact of the remote switch of the first) trigger cell, the first input of the driver is connected to the negative power bus, the second input is to the output of the trigger key, switching contact the remote switch of each subsequent trigger cell is connected to the make contact of the remote switch of the previous cell, characterized in then, in order to increase noise immunity, a voltage divider is included in it between the negative and positive power buses, the trigger key input is connected to its midpoint, in each trigger cell each key element is made on a single-junction transistor, the emitter of which is connected to the first output of the remote switch winding, the first base - with a negative supply bus, the second base § of the first and second single-junction transistors - respectively with the opening and closing contacts of the remote switches and through resistors - with a positive power bus while the second terminals of the windings of the remote switches are connected to. the output of the start key. SU ,, 1075416