SU1413707A1 - Optronic transducer - Google Patents

Description

(21) 4096978 / 21-24

(22) 05/26/86

(46) 07/30/88. Bksh. 28

(72) V.A. Lavrov, V.I. Shtyrev

and I.P. Kostik

(53) 621.374 (088.8)

(56) Nosov Yu.R., Sidorov A.S. Optocouplers and their application M .: Radio and communication,

1981, p. 231, fig. 62.

USSR author's certificate 1241437, cl. H 03 K 5/00, 04,01.85.

(54) OPTOELECTRONIC CONVERTER (57) The invention can be used in automation and computing devices as a tire driver. The optoelectronic converter contains control bus 1, information bus 2, output bus 3, reception bus 4, elements NOT 5.6, element 2И-НЕ 7, element 2И 8, resistors 9-13, transistors 14-16, optocouplers 17-19 . Optoelectronic converter has enhanced functionality with increased reliability. 1 il.

2 0-1

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M

.-four

The invention relates to a pulse technique and can be used in automation and computing devices as a tire driver.

The purpose of the invention is to enhance the functionality while increasing reliability.

The drawing shows an optoelectronic converter circuit.

The device contains control bus 1, information bus 2, output bus 3, reception bus 4, iHE 5 and 6 elements, 2I-HE 7 element, i2H 8 element, resistors 9-13, transistors 14-16, optocouplers 17-19 The output of the optical current 19 through the amplifier 20 is connected to the bus 4 and the first input of the element 12И-НЕ 7, the output of which is connected to the single input of the element 2И 8, the second input of which is connected to the bus 1.; The source 21 of the power through the resistor 9 is connected to the first pins of the optocouplers 17 and 18, to the collector of the transistor 14 and the first pin of the resistor 1I, the second of which is connected to the first One optocoupler 19, the second output of which is connected to the collector of transistor 16, the base of which through the resistor 13 is connected to the bus 3, and through the resistor 12 to the common bus and emitter of the transistor 15, the collector of which is connected to the bus 3 transistors 14 and 15 are connected, respectively, to the second pins of optocouplers 17 and 18, the third pins of which are combined and through a resistor 10 are connected to the output of the NOT element 5, whose input is connected to the output of the element 2 and 8, the information bus 2 is connected to the fourth output of the optocoupler 17 and through -ment NOT 6 - to the fourth output of the optocoupler 18 and to the second input of the element 2 –– NOT 7.

The device works as follows.

When potential arrives on bus 1, it is through the element HE 5 and the resistor 10 that the potential 1 arrives at the cathodes of the LEDs of the optocouplers 17 and 18, and regardless of the signals on bus 2, no current flows through the LEDs. Transistors 14 and 15 are closed and receive mode is provided on bus 3, i.e. incoming signals through a resistor 13 are fed to the base. transistor 16 and open it up, you

p Q

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five

By passing current through the LED of the optocoupler 19, the photodiode signal of the optocoupler 19 is amplified to the potential level of control signals and passes to the bus 4.

In the absence of signals on the bus 3, the transistor 16 is locked by the potential of the common bus from the resistor 12, the optocoupler 19 is turned off and the output O is provided at the output of the amplifier 20.

To transfer bus 3 to transfer mode, potential 1 is supplied to bus 1, which through the element HE 5 and the limiting resistor 10 provides low potential at the cathodes of the LEDs of optocouplers 17 and 18. When transmitting 1 from bus 2, the resistance of the photodiode 17 drops, transistor 14 opens and potential 1 already from the source 21 passes to the bus 3. When O transmits from the bus 2 through the NOT 6 element, the LED of the optocoupler 18 is detected, the transistor 15 opens and the potential O from the common bus is applied to the bus 3. Thus, the device functions as a bus driver. At the same time, optocoupler allows transforming signals from one logic level (for example, 5V) into signals of another level (for example, 9V) to two electrically not connected power sources, which ensures noise immunity. In addition, when the bus 3 is in transmission mode, the signal is removed from it through the optocoupler 19, and the transmission control can be controlled on bus 4. When the bus 3 is connected to the outputs of the controlled logical node and the source 21 is present due to a short circuit fault, the transistor 16 opens to the bus 3 and, through the optocoupler 19, the amplifier 20 receives the second input of the element 2-NOT 7.

When supplying O from bus 2 via the NOT element 6, the element 2I-NOT opens and the signal 2I 8 closes with a signal from its output, thereby blocking the transmission of O through the optocoupler 18. Transistor 15 does not open and is thus protected from short circuit current. When transmitting I from bus 2 through the element NOT 6, element 7 is closed, the LED blocking of the optocouplers 17 and 18 does not block, while the control reception on the bus 4 1 s NINA 3 does not affect the transmission mode.

Claims (1)

Invention Formula An optoelectronic converter containing a control bus connected to the first input element 2I, an information bar connected to the input element HE, a power source through a resistor connected to the collector of the first transistor, to the first terminals of the first and second optocouplers and the second resistor, the emitter of the first transistor connected to the collector of the second transistor, the second leads of the optocouplers are connected to the bases, respectively, of the first and second transistors, the emitter of the second transistor is connected to the common bus and the first lead of the third transistor of the third resistor, the third pins of the optocouplers are connected to the output of the fourth resistor, so that, in order to expand the functionality while increasing reliability, the element 2I-NOT, the third optocoupler and the transistor, the second element is NOT and the fifth resistor connected between the base of the third transistor and the output bus that is connected to the collector of the second transistor, the second G terminal of the third resistor is connected to the base of the third transistor, the first terminal of the third optocoupler is connected to the second terminal of the second resis ora, the second output of the third optocoupler is connected to the collector of the third transistor, the emitter of which is connected to the common bus, the third and fourth outputs of the third optocoupler are connected to the corresponding inputs of the amplifier, the output of the amplifier is connected to the first input of the element 2I-NOT, the output of which is connected to the second input of the element 2I, whose output through the second element is NOT connected to the second output of the fourth resistor, the fourth output of the first optocoupler is connected to the information bus, the output of the first element is NOT connected to the fourth input the second photocoupler and a second input element, ment 2ND-NO, the output amplifier is a bus receiving transducer.