SU1596452A1 - Multiple-input logic element - Google Patents

Abstract

The invention relates to automation and measurement technology and can be used in multichannel systems requiring electrical isolation of inputs. The purpose of the invention is simplification. Multi-input logic element And contains a transformer 1, having first 2, second 3 and N-1 additional windings 4, N resistors 6, additional resistor 7, generator 8, D-flip-flop 9, transistor 10, comparator 11. The purpose of the invention is achieved by using in a multiwinding transformer device, to the inputs of which input signals are supplied having a logic level "1" or a logic "0". At the same time, the second winding 3 during the clock pulse of the generator 8 generates a voltage pulse due to the flow of direct current through it from the power source, the amplitude of which is determined by the level of the input signals of the device, since each input signal is fed to the winding of the transformer 1 through connected diode 5 and resistor 6, performing the function of a voltage limiter. 2 Il.

Description

The invention relates to automation and measurement technology and can be used in multichannel systems requiring galvanic isolation of inputs. The purpose of the invention is a simplification, a multi-input logic element And contains a transformer 1,

2

having the first 2, second 3 and Ν-1 additional windings 4, N diodes 5,

N resistors 6, additional resistor 7, generator 8, три-flip-flop 9, transistor 10, comparator 11. The purpose of the invention is achieved through the use of a multiwinding transformer at the inputs of which inputs are input signals having a log level. "1" or log. "ABOUT". At the same time on the second winding 3 during the clock pulse of the generator 8, a voltage pulse is formed due to the flow of direct current through it from the power source, the amplitude of which is determined by the level of input signals from the device, since each input signal is fed to the transformer 1 through a serially connected diode 5 and a resistor 6, performing the function of a voltage limiter.

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The invention relates to automation and measurement-engineering and can be used in multichannel systems requiring galvanic isolation of inputs. .

The purpose of the invention is to simplify.

FIG. 1 is an electrical block diagram of the AND multi-input logic element; in fig. 2 voltage plots explaining the principle of operation of the device.

The device contains a transformer 1 having the first winding 2, the second winding 3, (Ν-1) additional immo-15 current 4, N diodes 5, N resistors 6, additional resistor 7, generator 8 clock pulses,-flip-flop 9, transistor 10 comparator 11.

The device works as follows 20 times.

At the device inputs receive a constant voltage corresponding to the level of the log. “Г or“ 0 ”At the same time, these voltages are applied to diodes 5 in the stop direction. When the generator 8 generates a pulse Ό (see Fig. 2), the transistor 10 opens, which leads to an increase in the voltage on the second winding 3 of the transformer 1, which, however, is limited by the minimum input voltage of the device. So, if at all inputs of the device there is a log. "1", in this case, the comparator 11 will work and on the 35 output of the три-flip-flop 9 a signal log. "1" will be generated, which will be fixed to the device operation time by a signal

(see Fig. 2). If one of the inputs of the device will be present ^ signal log. "0", this will lead to locking the comparator 11 and the formation of the output log on the output of the O-flip-flop 9. and

The purpose of the invention is achieved through the use of the device one (multiwinding) transformer 1.

Claims (1)

 31 The invention relates to automation and measuring technology and can be used in multichannel systems requiring electrical isolation of inputs. The purpose of the invention is simplification. FIG. 1 is an electrical block diagram of the AND multi-input logic element; in fig. 2 voltage plots explaining the principle of device operation The device contains a transformer 1 having a winding 2, a second winding 3, - (N-1) additional winding 4, N diodes 5, N resistors 6, additional resistor 7, generator 8 clock pulses, D-flip-flop 9, the transistor 10, the comparator 11 The device operates as follows. The inputs of the device receive constant voltages corresponding to the level of the log „1 or O. At this, these voltages are applied to the diodes 5 in the locking direction. When the generator 8 generates a pulse U (see Fig. 2), the transistor 10 opens, which leads to an increase in the voltage on the second winding 3 of the transformer 1 which is however limited by the minimum input voltage of the device. So, if at all inputs of the device there is a log. 1, in this case, the comparator 11 will work and at the output of D-flip-flop 9 a signal will be generated from log 1, which will be fixed to the device's working cycle with a signal and (sms fig about 2). If the signal is present at one of the device inputs. Oh, this will lead to the pyrania of the comparator 11 and the formation at the output of the D-flip-flop 9 of the signal log. A. 2 The purpose of the invention is achieved by using a single (multiwinding) transformer 1 in a device. Invention Multi-input logic element AND containing a transformer having first and second windings, N diodes, N resistors, comparator, transistor, additional resistor, the first output of which connected to the power bus, characterized in that, for the purpose of simplification, the transformer is provided with (N-1) additional windings, and also a clock pulse generator, having two outputs, and a D-flip-flop, with the first output The second winding of the transformer is connected to the collector of the transistor, and the second output is connected to the second output of the additional resistor and the input of the comparator, the output of which is connected to the information input of the D-flip-flop, the first output of the clock generator is connected to the base of the transistor, and the second output is connected to the synchronization input D -trigger, the output of which is the output of the multi-input logic element I, the emitter of the transistor is connected to the common bus, the first diode is connected to the first p through the first winding of the transformer the i-diode through the i-th additional winding of the transformer is connected to the i-th resistor, de i 2,3, .oo, N, and the cathode of the first diode and the second terminal of the first resistor form the first input, and the cathode of the diode and the second output The i-ro of the resistor form the i-th input, where, 3, .o., N, of the multi-input logic element I.