SU1520651A1 - Optoelectronic gyration transformer - Google Patents

Abstract

The invention relates to radio electronics and can be used in devices for matching impedances with galvanic isolation. The purpose of the invention is to simplify the adjustment of the transformation ratio while maintaining the stability of the latter. An optoelectronic gyratory transformer contains a light emitter 1, rc 2 direct current, an optoelectronic gyrator 3 containing six phototransistors 5-10 and six light-modulating elements (SME) 11-16, as well as a gyrator 17 containing six phototransistors 18-23 and six SME 24-29. The proposed transformer can work as downward and upward. An additional potentially controlled FEM can be used as an optical absorption filter. A simple variation of the bias voltage on it is achieved by setting the required coefficient. the transmission α and, therefore, the adjustment process is simplified. transformer transformation. 1 il.

Description

The electronic gyratory transformer contains a light emitter 1, rc 2 direct current, an optoelectronic gyrator 3 containing six phototransistors 5-10 and six light-modulating elements (SME) 11-16, and also a gyrator 17 containing six phototransistors 18- 23 and six FMS. The proposed transformer can work as downward, so

and increasing power. As an optical absorbing filter m, b, an additional potentially controlled FMS is used. A simple variation of the bias voltage on it is achieved by setting the required coefficients, transmittance oL and, consequently, the process of adjusting the coefficients is simplified. transformer transformation. 1 il.

The invention relates to radio electronics and can be used in impedance matching devices with galvanic isolation.

The purpose of the invention is to simplify the regulation of the transformation ratio while maintaining the stability of the latter.

The drawing shows a circuit diagram of an optoelectronic gyratory transformer.

An optoelectronic gyratory transformer contains a light emitter 1, a direct current generator 2, a first optoelectronic gyrator 3 containing an absorbing optical filter 4, the first is a photoelectric transistors 5-10 and the first is a light-transmitting P-16 light-emitting elements and a second Optoelectronic gyrator 17 containing a first-scatter phototransistors 18-23 and first-scles

light-modulating elements 24-29, 1

Optoelectronic gyratory transformer operates as follows.

In the initial state, the potential-controlled light-modulating elements with high differential resistance (5-10 ohms) are in the displacement mode, so that a constant luminous flux falls on phototransistors with internal differential resistance 3 ohm ohm. Apply to the input terminals of the first optoelectronic gyrator the input voltage and the negative potential applied to the first input terminal, and the positive to the second input terminal. Taking into account the polarity of the second and first power sources, this causes the control voltage to the third 13 and fourth 14 light-modulating elements increase by the value of willows, (/ 2, and by six

five

0

five

0

volume 16 and volume 15 of the light-modulating elements are also reduced by the value. Since the light-modulating elements used in an optoelectronic gyratory transformer have the same type of modulation characteristic, for example, increasing, what does the increase in the transmittance with increasing control voltage, then the fourth phototransistor 8, optically coupled through the absorbing optical filter 4 to the third 13 and fourth 14 light-modulating elements, the luminous flux increases, and, therefore, its photocurrent grows, and on the third phototransistor 7, optically coupled through the absorbing optical filter 4 to the sixth 16th and fifth 15 light-modulating elements, the luminous flux decreases and, consequently, its photocurrent decreases. The variable components of the currents of the third 7 and fourth 8 phototransistors are summed and form a voltage controlled output current source

five

0

five

 2oiS and.

(one)

 -OUT - 61.

where: o, is the transmittance of the optical absorbing filter 4;

S is the steepness of phototransistor current control over the light-modulating element,

At the same time, in the first optoelectronic gyration unit 3, the control voltage increases on the second light and light-frequency control element 12 connected in parallel to the third phototransistor 7, and decreases in the first light modulating element 1I connected in parallel to the fourth phototransistor B. Consequently, the second 6

and the first O 9 phototransistors, optically connected through the absorbing optical filter A to the second light-modulating element 12, increase the Photocurrent, and on the first 5 and sixth .10 phototransistors, optically connected through the absorbing optical filter, 4 to the first light-modulating element 11 The photocurrent decreases. The variable components of the currents of the second 6 and sixth 10 phototransistors and the first 5 and fifth 9 phototransistors are summed up in pairs and make up the control voltage of the input source J5 with the current lead at the second input terminal

Ig 2 v S ive (X.

(2)

where and

Bblx

- the output voltage of the output current source (O, measured relative to the common bus,

The joint counter-parallel connection of the current sources controlled in accordance with (1) and (2) forms the first of the optoelectronic transformer transformers, which is balanced from the input terminals side.

In the second optoelectronic girator, taking into account the polarity of the third power source, the voltage Ugbix causes an increase in the transmittance of the second light-modulating element 25 and its decrease in the first light-modulating element 24, which in turn leads the second 19 and 25 phototransistors to as the photocurrent increases, while the first 18 and sixth have 23 phototransistors to decrease the photocurrent. The variable currents of the first 18 and fifth 22 phototransistors and the second 19th and sixth 23 phototransistors are summed up in pairs and make up a voltage controlled source of the output current with a current lead on the first output terminal

 2 S 11е, х

(3)

The presence of an output current source (3) causes the appearance at the output terminals of the output voltage, the negative potential corresponding to the first output terminal and the positive potential to the second output terminal. Taking into account the polarity of the fourth and fifth power sources, this leads to the fact that the control voltage on the sixth 29 and fifth 28 light-modulating elements increases.

one

and in the fourth 27. and the third 26 light-modulating elements decreases, as a result the photocurrent of the third phototransistor 20 increases, and the fourth phototransistor 21 decreases. The variable components of the currents of the third and fourth phototransistors 20 and 21 constitute a source of input current controlled by the output voltage

1 in 2S Upy, (.

(four)

The joint counter-parallel connection of the current sources controlled in accordance with (3) and (4) forms the second gyrator 17 of the transformer balanced from the output terminals side. Cascade connected balanced from the input terminals of the first optoelectronic gyrator 3 and balanced from the output side of the second optoelectronic gyrator 17 implements an optoelectronic gyratory transformer.

When the device is executed on a light-emitting diode, o-tccrystalline light-modulating elements and phototransistors, the transformation coefficient n with high accuracy (error: 0.1%) is expressed in terms of kOe (1x || the optical transmission coefficient of the optical absorbing filter (ni)), and The loss resistance, characterizing the efficiency of an on-electronic gyratory transformer, is quite low. The proposed opto-electronic gyratory transformer can work both down and up. In the latter case, it is sufficiently changed. s places connecting the input and output terminals and its transformation ratio will be equal ..

An additional potentially controlled light-modulating element can be used as an optical absorption filter. A simple variation of the bias voltage on it achieves the setting of the required transmittance od and, therefore, simplifies the process of adjusting the transformer ratio. To increase the upper limit of the frequency range of transformer matching, instead of transistor photodetectors and liquid-crystal light-modulating elements, respectively, reverse-biased photodiodes and refractory-ceramic modulating elements can be used.

The construction of the proposed transformer exclusively on homogeneous, optoelectronic components, including potentially controlled light-modulating elements, allows us to simplify the device, improve the manufacturability of its execution, to ensure the setting of the transformation coefficient by means of a single parameter — the transmittance of the optical absorbing filter. An office transformer is used to increase the accuracy of the transformation coefficient.

Claims (1)

Invention Formula An optoelectronic gyratory transformer containing a cascade of the first and second gyratory with different gyration conductivities, the inputs of the first optoelectronic transformer being the outputs of the gyratory transformer, about 1 that, in order to simplify the adjustment of the transformation ratio while maintaining the stability of the latter, a light emitter, a DC generator, and each optoelectronic soda gyrator were introduced INH first; the second, third, fourth, fifth, sixth phototransistors, the first, second, third, quarter, fifth, lightning modulating elements, while in the first optoelectronic gyrator the collector of the first phototransistor is connected to the emitter of the fifth phototransistor and to the first input terminal, the emitter of the first phototransistor and the collector of the fifth phototransistor are connected respectively to the buses of the first and second power sources, the emitter of the second phototransistor is connected to the emitter of the first phototransistor, and the collector of the second phototransist ra is connected to the emitter of the sixth phototransistor whose collector is connected to the bus of the second power source, the fourth collector coupled phototransistor common bus, and an emitter connected to a phototransistor of collectors of the third and Q five 0 25 so. „.with 50 55 with the output of the first rtl of the lek1) of the opposite gyrator, the emitter is the third (the phototransistor is connected to the third of the power supply, the collector of the second phototransistor is connected to the second. The input terminal, the first, second, third, fourth, fifth and sixth light-modulating elements are located between an absorbing optical filter and, respectively, the first and sixth phototransistor, the second and fifth phototransistors, the fourth phototransistor, the third phototransistor, and the absorbing optical filter is installed between the light-emitting diode first and second, third, fourth, fifth, sixth light modulating elements including parallel to the fourth, third, second, fifth, sixth, first phototransistor, and in the second optoelectronic gyrator, the emitter of the first phototransistor is connected to the collector of the fifth phototransistor and to the first output terminal, the collector of the first phototransistor and the emitter of the fifth phototransistor are connected respectively and fifth power sources, the emitter of the second phototransistor is connected to the collector of the sixth phototransistor and to the second output terminal, the emitter of the sixth phototransistor and to The levers of the second and fourth phototransistors are respectively connected to the tires of the fifth power source, the collector of the fourth phototransistor is connected to the common bus, and the emitter is connected to the input terminal of the second optoelectronic gyrator and the collector of the third phototransistor, the emitter of which is connected to the third power source bus the third, fourth, fifth, and sixth light-modulating elements are located between the first and sixth, second, and fifth, fourth, and third phototransistors; the first, second, third, h the fourth, fifth, sixth light-modulating elements are connected in parallel with the fourth, third, fifth, second, sixth, first phototransistors, the anode of the light emitter is connected to the bus of the second power source, and the cathode is connected to the right output of the DC generator, the second the output of which is connected to the bus of the first power source