SU886031A1 - Device for receiving code data - Google Patents

Description

one

. The invention relates to devices for receiving information, for example, in computing.

A device for receiving from a bipolar code is known, comprising an invaror, a torus, a pulse shaper and an element.

AND

The disadvantage of this device is the asymmetry of the inputs, which .Q leads to an additional error of the device.

Closest to the proposed technical entity is a device for receiving code information, containing security elements and comparators connected to the power buses, the inputs of security elements are connected. to the inputs of the device, and dividers (| Apr 3. 3..

The disadvantage of the device is that the circuit construction of the receiver circuit of a sequential bipolar code requires the use of a significant number of discrete components, power sources and does not allow for sufficient symmetry of the inputs to suppress common mode noise (due to the lack of differential inputs) .30

The aim of the invention is to improve the accuracy and simplification of the device.

The goal is achieved by the fact that in: a device for receiving code information containing limiting elements and comparators connected to power supply chines, inputs of restricting elements are connected to the inputs of the device, and voltage dividers, outputs of the first and second limiting elements through the first and second dividers eg connected to the first inputs of the first and second comparators, respectively; the outputs of the first and second limiting elements through the third and fourth voltage dividers are connected to orym inputs respectively of the first and second comparators, whose outputs are connected to the outputs of the device, the inputs of the first and second voltage dividers are connected to the first power bus and the inputs of the third and fourth voltage divider connected to the second power bus.

The drawing shows the functional electrical circuit of the device. .

A device for receiving code information contains the first and second

- limiting elements 1 and 2, inputs 3 and 4 devices, first, second, third and fourth, voltage dividers 5-8 / made. Of resistors, first and second comparators 9 and 10, outputs 11 and 12 devices, first and second power buses 13 and 14, total bus 15.

The first and second tires 13 and 14 of the power supply are supplied with different polarities relative to the common bus 15. Comparators 9 and 10 have differential inputs + .and -,

As can be seen from the drawing, the connection of the resistors of the voltage dividers 5-8 is such that it does not violate the symmetry of the inputs of comparators 9 and 10, while specifying a certain negative potential at the inputs + of the comparators 9 and 10 and a positive one at the inputs. Thus, it is possible with the help of voltage divider resistors 5–8 to set certain levels of voltage to the inputs of comparators 9 and 10 without disturbing the symmetry of the inputs of the latter.

Single information is supplied to the first input 3 of the device by a positive voltage level, and on the second 4 - by a negative one. At the same time at the input + of the first comparator 9, the potential is higher than at the input -. Consequently, at the output 11 of the first comparator 9, a high level signal appears indicating that a single information has been received. At the same time, at the input + of the second comparator 10, the potential is lower than at the input - and at output 12 - a low level signal

When receiving zero information to the first input 3, the signal arrives at a negative level, and to the second input 4 - a positive one. In this case, a high level signal appears at the output 12 of the second comparator 10.

Load resistors provide the connection of the supply voltage to

, the output stages of the comparators 9 and 10. Hence, the single information is selected by the first comparator 9, and the null information by the second comparator 10.

The use of the proposed scheme allows one to obtain a significant economic effect by reducing the number of discrete components used in the scheme and the power supply ratings, as well as to increase the level of noise immunity with respect to common-mode and non-sintered interference.

Claims (2)

Invention Formula A device for receiving code information containing restricting elements and comparators connected to power buses, entrances of restricting elements are connected to the device inputs, and voltage dividers, characterized in that, in order to improve the accuracy and simplify the device, there are first and second restrictive outputs elements through the first and second voltage dividers are connected to the first inputs of the first and second comparators, respectively; the outputs of the first and second limiting elements through the third and fourth eliteli turnkey voltage to the second inputs respectively of the first and second comparators, whose outputs are connected to the outputs of the device, the inputs of the first and second voltage dividers are connected to the first power bus and the inputs of the third and fourth voltage divider connected to the second power bus. Sources of information taken into account in the examination 1 USSR Author's Certificate No. 414585, cl. Q06 F 3/04, 1971. 2. Digital computers, digital computers 20-7. Technical specification, b F1.700.024.TO., ch.D, M, 1972, sb2 (prototype). ABOUT 0/5 on