RU2661278C1 - Logic signals galvanic isolation device (embodiments) - Google Patents

Logic signals galvanic isolation device (embodiments) Download PDF

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RU2661278C1
RU2661278C1 RU2017121249A RU2017121249A RU2661278C1 RU 2661278 C1 RU2661278 C1 RU 2661278C1 RU 2017121249 A RU2017121249 A RU 2017121249A RU 2017121249 A RU2017121249 A RU 2017121249A RU 2661278 C1 RU2661278 C1 RU 2661278C1
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input
amplifier
galvanic isolation
terminal
output
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RU2017121249A
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Russian (ru)
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Александр Васильевич Яковлев
Федор Владимирович Молев
Алексей Геннадьевич Сергушев
Андрей Геннадьевич Скворцов
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Открытое акционерное общество "Авангард"
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    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K3/00Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K5/00Manipulating pulses not covered by one of the other main groups in this subclass
    • H03K5/125Discriminating pulses
    • H03K5/1252Suppression or limitation of noise or interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0264Arrangements for coupling to transmission lines
    • H04L25/0266Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/38Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40Transmitting circuits; Receiving circuits
    • H04L25/49Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/493Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by transition coding, i.e. the time-position or direction of a transition being encoded before transmission

Abstract

FIELD: data processing.
SUBSTANCE: invention relates to the information over wire lines reception and transmission devices. It can be used for reception and transmission of pulse signals of arbitrary duration in automatic control systems and information collection and processing systems. Device comprises galvanic isolation element in the form of pulse transformer (4), in-series connected input information encoder (1), transmitter (TR) terminal amplifier (3), and also the in-series connected the receiver input threshold amplifier (5) and the decoder (6). Transmitter terminal amplifier (3) consists of two identical amplifiers (3.1 and 3.2), made in the form of buffer digital amplifiers with three states: “1”, “0” and “disconnected”, between which outputs the galvanic isolation element is connected in the form of transformer (4) with one primary and one secondary winding. At that, coming to the galvanic isolation element, the transformer (4), input signals, are encoded by two unipolar signals, shifted in time by the delay time, set by the delay element (2), the pulses duration generator.
EFFECT: technical result consists in increase in the data transmission frequency up to 100 Mbit/s, the device design simplification and increase in its reliability.
1 cl, 6 dwg

Description

The claimed technical solution relates to the field of electronics, in particular to devices for receiving and transmitting information over wired communication lines. It can be used to receive and transmit information via a serial interface in RS-485, RS-422, RS-232 formats, as well as pulse signals of arbitrary duration in automatic control systems and information collection and processing systems

Known devices for transmitting information through communication lines with optocoupler and transformer galvanic isolation, which exchange information with peripheral devices.

So, for example, the circuit described in the RF patent for utility model is known: RU 63148 U1 dated 05/10/2007, IPC H04L 29/00, “Physical implementation of a CAN 2.0V interface transceiver module over a two-wire current line” - [1]. The device [1] provides coupling of the multiplex channel microprocessor with a two-wire data line. Galvanic isolation is carried out using optocouplers.

A disadvantage of the known device [1] is that the digital channel transceiver contains optocouplers that lose their functionality under the influence of special factors, which significantly reduces the reliability of the device and limits the scope of such a device. Another disadvantage of using optocouplers is the impossibility of their use for galvanic isolation of high-speed data lines.

Known two-wire system for duplex transmission of information described in the patent of the Russian Federation for the invention: RU 2381627 C1 dated 02/10/2010, IPC H04L 5/14, H04B 1/56, “System for duplex transmission of information on a two-wire communication line” - [2]. In the analogue of [2], a signal recovery circuit is used at the output of the communication line and power is supplied to the remote information receiving device via the same communication line, which significantly reduces the noise immunity of the communication line. In this case, the system contains two interconnected two-wire lines and using the biphasic encoding method of transceiver devices with biphasic decoder, biphasic encoder and galvanic isolation element in the form of a transformer located in each of them. Buffer digital amplifiers with a low output impedance are used as output amplifiers, the outputs of the amplifiers are connected to the transformer primary winding and a matching bipolar with an impedance close in the required frequency range taking into account the transformation coefficient to the wave impedance of the communication line. The encoders are equipped with an additional output, on which a signal is generated, which is necessary to suppress the transmitted signal at the input of the receiving path, the decoders are made according to the scheme using analog filtering of decoded signals. The receiving path of each transceiver device is equipped with an amplitude-frequency correction device.

The disadvantage of the analogue [2] is its comparative structural complexity, as well as the high energy costs during its operation (when transmitting information signals).

Known galvanic isolation circuit with high transient resistance according to US patent: US 5952849 (A) from 09/14/1999, PMK H04L 25/02, H04L 25/493, "Logic isolator with high transient immunity)) - [3]. The analogue [3] contains a transformer unit with channel communication to ensure isolation. The input circuit of the device provides pulses that indicate rising and falling edges, and the output circuit of the circuit on the isolated side of the barrier converts the signal with pulses back into a digital logic signal with rising and falling edges. The polling function often updates the output. The galvanic isolation device according to the patent [3] may be provided in one module for use in a process control board or may be provided in the form of several parts for mounting on a printed circuit board.

Also known is a transceiver with transformer galvanic isolation AMD2486 according to US patent US 7683654 (B2) dated 03/23/2010, IPC H01F 17/00, H01F 19/08, H03K 17/16, "Signal isolators using micro-transformers)) - [4] . In analogue [4], a pulse transformer is used as a galvanic isolation device, which is connected between the pulse shaper and the terminal amplifier of the transmitter, placed inside the microcircuit, and has no direct connection with external circuits. The pulse transformer is an insulating barrier and divides the transceiver circuit into two parts. One of them has a galvanic connection with the equipment, which includes a transceiver, which is powered from a common power source with the equipment. The other part does not have galvanic connection with the main equipment and requires an additional power source galvanically isolated from the main equipment for its power supply.

The disadvantages of analogues [3] and [4] is the complexity of its design, and, therefore, the difficulty of its practical implementation.

Also known are technical solutions - devices for galvanic isolation of logical signals according to the article “Isolators μModule: Highly Integrated Isolated Interfaces for Responsible Applications from Linear Technology (LTC)” according to the magazine for engineers and designers: “Herald of Electronics” No. 3 (57), 2016, p. 44 ... 50, figures 1 ... 19 - [5]. The galvanic isolation in modules of isolated interfaces according to [5] is based on the use of built-in, inductively connected coils, where data is transmitted differentially across the isolation boundary. This transmission mode is characterized by extremely high stability and reliability of the overall circuit in terms of data transmission and reception. Simple solutions that provide the necessary isolation barrier are made by integrating in one module case not only a directly isolated data transmission circuit, but also an isolated power supply, as well as all the necessary passive strapping components, including decoupling capacitors. The achieved insulation barrier ultimately leads to a higher degree of reliability and protection against static electricity. To further ensure reliable digital communications, the system also includes data updates, an error checking algorithm and a safe shutdown function.

The disadvantage of technical solutions for galvanic isolation of logical signals by analogy [5] is that these devices also have the complexity of the design, and, therefore, the complexity of the technology for their manufacture.

The prototype of the claimed technical solution is "Serial interface transceiver with galvanic isolation element" according to patent RU 2511429 C2 dated 04/10/2014, IPC H03K 17/16, H04L 5/14 - [6]. The prototype [6] contains a galvanic isolation element in the form of a transformer, an input information encoder, a transmitter terminal amplifier, as well as a receiver input amplifier and a decoder, connected in series. At the same time, the device contains input data encoder, pulse shaper, transmitter terminal amplifier, as well as receiver input amplifier and decoder, connected in series. The galvanic isolation element is connected between the terminal amplifier of the transmitter and the communication line, and the input of the receiver amplifier is connected to the output of the terminal amplifier of the transmitter, while the input signals supplied to the galvanic isolation element are encoded by two opposite-polarity pulses corresponding to the front and decay of the input signal. The decoding device may have a decoder setup input. The pulse width generator can have inputs for setting the optimal duration of the output pulses entering the communication line. The input amplifier of the receiver may have inputs for setting the optimal threshold for the receiver.

The disadvantage of the prototype [6] are the restrictions on the data transfer rate, so the maximum data transfer frequency according to the prototype: up to 20 MHz with a pulse duration of up to 25 ns (that is, up to 20 Mbit / s).

The disadvantages of analogues and prototype poses the following tasks:

- simplifying the design of devices and the technology of their manufacture, as well as improving the reliability of devices and expanding the scope of their application;

- increase the frequency of data transmission.

The essence of the claimed invention lies in the fact that the galvanic isolation of logical signals, contains a galvanic isolation element in the form of a pulse transformer (hereinafter referred to as a transformer), an input information encoder, a transmitter terminal amplifier (PD), as well as a receiver input threshold amplifier, and decoder. In this case, the terminal amplifier of the transmitter consists of two identical (identical) amplifiers, made in the form of digital buffer amplifiers with three states: “1”, “0” and “off”, between the outputs of which there is an element of galvanic isolation in the form of a transformer. The input of the first terminal amplifier is connected to the output of the encoder. The input of the second terminal amplifier is connected to the output of the encoder through a delay element, which can be made in the form of: - a digital repeater with its own signal propagation delay; - integrating RC circuit; - directly the delay line with the specified delay time, etc. The input threshold amplifier of the receiver is made in the form of a threshold amplifier (Schmidt trigger), between the input and output of which a feedback resistor (R1) is connected, the input of the threshold amplifier of the receiver is connected to the input resistor (R2) to the output of the second terminal amplifier, the output of the first terminal amplifier is connected through a resistor (R3) to the source of the receiver threshold. The second inputs of the first and second terminal amplifiers are configured to disable the outputs of the terminal amplifiers, while the input signals supplied to the galvanic isolation element are encoded by two unipolar signals shifted in time by the delay time specified by the delay element.

In a device for galvanic isolation of logical signals, the input of the delay element can be connected to the output of the first terminal amplifier. Also in the claimed device, the input of the second terminal amplifier can be connected to the output of the first terminal amplifier.

The technical result is an increase in the data transfer rate to 100 Mbit / s, while achieving a significant simplification of the design of the device, and, therefore, increasing its reliability and lowering cost.

The limiting features of the claims “galvanic isolation of logic signals, contains a galvanic isolation element in the form of a pulse transformer (hereinafter referred to as a transformer), input data encoding device, transmitter terminal amplifier, as well as receiver input threshold amplifier and decoding device connected in series” are common to prototype and the claimed device.

Distinctive features of an independent claim: “the terminal amplifier of the transmitter is made of two identical amplifiers, made in the form of digital buffer amplifiers with three states:“ 1 ”,“ 0 ”and“ off ”, between the outputs of which there is a galvanic isolation element in the form of a transformer, the input of the first terminal amplifier is connected to the output of the encoder, the input of the second terminal amplifier is connected to the output of the encoder through a delay element, the input threshold amplifier of the receiver made in the form of a threshold amplifier (Schmidt trigger), between the input and output of which a feedback resistor (R1) is connected, the input of the threshold amplifier of the receiver is connected to the output of the second terminal amplifier through the input resistor (R2), the output of the first terminal amplifier is connected through the resistor to the installation source the threshold of the receiver, the second inputs of the first and second terminal amplifiers are configured to disable the outputs of the terminal amplifiers, while the input signals supplied to the galvanic isolation element languages encoded by two unipolar signals shifted in time by the delay time specified by the delay element ”allow to achieve the claimed technical result, namely, to significantly simplify the design of the device (and, therefore, increase its reliability and reduce cost), as well as increase data transfer rates to 100 Mbps

Distinctive features of the dependent claim: “the input of the delay element is connected to the output of the first terminal amplifier”, as well as “the input of the second terminal amplifier is connected to the output of the first terminal amplifier” are additional embodiments of the technical solution, which in turn lead to simplification of the design.

In FIG. 1 shows the General scheme of the transceiver with galvanic isolation (prototype).

In FIG. 2 is a diagram of a communication line with a transmitter and a receiver, and galvanic isolation.

In FIG. 3 is a timing diagram of a transceiver.

In FIG. 4 is a diagram of a transceiver with a delay element connected to an encoder (encoder).

In FIG. 5 is a diagram of a transceiver with a delay element connected to an amplifier.

In FIG. 6 is a diagram of a transceiver without a delay element (the delay element is a terminal amplifier).

The devices shown in the diagrams of FIG. 4, FIG. 5 and FIG. 6 shows only on one side of the communication line (on its left side), it is assumed that on the second side of the communication line (on its right side) similar devices are respectively located.

In figures 1 ... 6 are indicated:

1 - encoder input information (encoder);

2 - delay element - shaper of pulse duration;

3 - terminal amplifier of the transmitter;

3.1 - the first terminal amplifier of the transmitter;

3.2 - the second terminal amplifier of the transmitter;

4 - galvanic isolation element, for example, a pulse transformer connected directly between the output of the transceiver and the wired communication line;

5 - input amplifier of the receiver;

6 - decoding device (decoder);

Additionally, in figures 1 ... 6 are indicated:

PD - transmitter;

PM - receiver;

hp - communication line;

A - input pulses PD;

b - formed impulses of the communication line;

c - output pulses from the terminal amplifier (3, 3.1 and 3.2);

d - output pulses from the decoding device (6);

B — transmitter input signal delayed by delay element 2;

C is the output signal of the first terminal amplifier;

D is the output signal of the second terminal amplifier;

E is the input signal of the receiver from the communication line;

F is the average receiver threshold;

G is the output signal of the receiver;

R1 and R2 are resistors, respectively, for setting the lower and upper thresholds of the input amplifier;

R3 is a resistor for matching the average value of the threshold voltage source;

t З - delay time introduced by the delay element (2);

tр - delay time of signal propagation in the communication line (hp);

U threshold H is the upper level of the voltage threshold value;

L threshold L is the lower level of the threshold voltage value.

The device for galvanic isolation of logical signals contains an element of galvanic isolation in the form of a pulse transformer - hereinafter transformer (4), sequentially connected encoder (1) of input information, terminal amplifier (3) of the transmitter (PD), as well as series-connected input threshold amplifier (5) receiver and decoding device (6). The terminal amplifier of the transmitter (3) consists of two identical (digital) amplifiers (3.1 and 3.2), made in the form of buffer digital amplifiers with three states: “1”, “0” and “disabled”. Between the outputs of the amplifiers (3.1 and 3.2) a galvanic isolation element is included in the form of a transformer (4) with one primary and one secondary windings. The input of the first terminal amplifier (3.1) is connected to the output of the encoder (1). The input of the second terminal amplifier (3.2) is connected to the output of the encoder (1) through the delay element (2). The delay element (2) can be made in the form of: - a digital repeater with its own propagation delay; - integrating RC circuit; - directly delay lines with a specified delay time, etc. The input amplifier (5) of the receiver (PM) is made in the form of a threshold amplifier, for example, a Schmidt trigger, between which the feedback resistor (R1) is connected between the input and output and the input of the threshold amplifier (5) the receiver (PM) through the input resistor (R2) is connected to the output of the second terminal amplifier (3.2), the output of the first terminal amplifier (3.1) is connected through the resistor (R3) to the source of the receiver threshold (PM), and the second inputs of the first and second terminal amplifiers (3.1 and 3.2) are configured to disable the outputs of terminal amplifiers (3.1 and 3.2). In this case, the input signals arriving at the galvanic isolation element - transformer (4) are encoded by two unipolar signals, shifted in time by the delay time, specified by the delay element (2) - pulse duration shaper (see the circuit of Fig. 4).

In a device for galvanic isolation of logical signals, the input of the delay element can be connected to the output of the first terminal amplifier (see the circuit of Fig. 5). Also in the device, the input of the second terminal amplifier can be connected to the output of the first terminal amplifier (see the circuit of Fig. 6).

The operation of the claimed device of galvanic isolation of logical signals is illustrated by the circuit shown in FIG. 2, with the timing diagram shown in FIG. 3.

When data (information) is transmitted to the input of the transmitter (PD) for transmission over the communication line (hp) from the output of the encoder (1) to the first terminal amplifier (3.1), the data is transmitted directly, and to the second terminal amplifier (3.2) with a delay t З , defined by the delay element (2). With the same signals at the output of terminal amplifiers (3.1 and 3.2), current does not flow through the primary winding of the transformer (4), since points C and D have the same voltage values. At different voltage values for a time t З, the output current of the terminal amplifiers (3.1 and 3.2) transmits a pulsed current through the primary winding of the transformer (4) with the direction corresponding to the coding level (“1” or “0”). In this case, a pulse current of the corresponding direction is formed in the secondary winding of the pulse transformer (4) and in the communication line (hp) (for example, “1” - “+” or “0” - “-”).

When a pulse current flows in the communication line (hp) and in the primary winding of the transformer (4) of the receiver (PM), a pulse signal of the corresponding polarity and voltage level is formed on the secondary winding of this transformer (4), which is fixed by a threshold amplifier (5) - Schmidt trigger. The threshold levels are determined by the ratio of the resistors (R1) and (R2) and the average required average voltage of the threshold source, which is set through (R3). The generated signal from the output of the threshold amplifier (5) is fed to the input of the decoder (6).

Additionally, the time diagram of Fig. 3 shows the threshold values of the upper and lower levels U threshold Н and U threshold L , as well as the signal propagation delay time t З taking into account the restoration of transmitted information, as well as the signal propagation delay time t P in the communication line ( hp).

The schematic diagram of the galvanic isolation device of FIG. 4 is made with the combination of a receiver (PM) and a transmitter (PD) when working with a bi-directional communication line, while the delay element (2) is connected to the output of the encoder (1). In the circuit diagram of FIG. 5, the delay element (2) is connected to the output of the first terminal amplifier (3.1). In the circuit diagram of FIG. 6, the input of the second terminal amplifier (3.2) is connected to the output of the first terminal amplifier (3.1).

Many modern isolated data exchange and transmission devices contain pulsed transformers as an element of galvanic isolation, which provide a voltage insulation level between the input and output windings of 5 kV mean square value (RMS) and more, which is achieved by the corresponding structural and technological solutions .

The proposed device uses pulse transformers with two windings. To ensure the transmission / reception rate of information up to 100 Mbit / s, the primary and secondary windings have 3 turns of wire each and are located opposite each other on the ring ferrite core М1500НМ3-34 К-4.0 × 2.5 × 1.2 mm (∅ 4 mm). The application of the technology of enveloping the core and transformer windings with the adhesive composition makes it possible to ensure mutual capacitance between the windings of less than 0.5 picofarads and the level of galvanic isolation up to 5 kV (SCZ).

In the device, elements of the 1554ЛП8 chip (IN74AC125D - four buffer elements with three states at the output) were used as terminal amplifiers, and elements of the 1554ЛИ9 chip (IN74AC34D - six repeaters) were used as a threshold amplifier. When implementing the device according to the circuit of FIG. 6, the maximum data transfer rate is limited to 100 Mbit / s with a communication line length of up to 3 m and t З ≤10HC for the buffer amplifier of the transmitter (at U supply = + 5B ± 1% and U threshold = + 2.5B ± 1%).

When working with more distant objects, the schemes of FIG. 2, FIG. 4 and FIG. 5 with the values of the minimum duration t З of the delay element selected for the required communication line (at t З = 1 μs, the maximum data transmission / reception rate will be no more than 1 Mbps. Depending on the required communication line length and data transmission / reception rate, the number of turns The transformer windings can be changed.When implementing a galvanic isolation device for local applications (for example, in a single module), one transformer can be used that separates the transceiver parts of the device, and to weaken the sync two transformers (for example, according to Fig. 2).

We believe that the proposed device for galvanic isolation of logical signals has all the criteria of the invention, since the combination of restrictive and distinctive features of the claims is new for structures and elements of galvanic isolation, and therefore meets the criterion of "novelty."

The set of features of the claims of the proposed device is unknown at this level of technology and does not follow well-known rules for the development and construction of devices for galvanic isolation of logical signals, which proves compliance with the criterion of "inventive step".

The development, design and implementation of the proposed device for galvanic isolation of logical signals does not present any structural, technical and technological difficulties, which implies compliance with the criterion of "industrial applicability".

Literature

1. RF patent for utility model: RU 63148 U1 dated 05/10/2007, IPC H04L 29/00, “Physical implementation of a CAN 2.0B interface transceiver module over a two-wire current line”.

2. RF patent for the invention: RU 2381627 C1 dated 02/10/2010, IPC H04L 5/14, H04B 1/56, “System for duplex transmission of information over a two-wire communication line”.

3. US patent for the invention: US 5952849 (A) from 09/14/1999, PMK H04L 25/02, H04L 25/493, "Logic isolator with high transient immunity)).

4. US patent for invention: US 7683654 B2) dated 03/23/2010, IPC H01F 17/00, H01F 19/08, H03K 17/16, “Signal isolators using micro-transformers)).

5. Magazine for engineers and designers: “Bulletin of Electronics” No. 3 (57), 2016, article: “Isolators μModule: Highly integrated isolated interfaces for critical applications from Linear Technology (LTC)”, pp. 44 ... 50, figures 1 …19.

6. RF patent for the invention: RU 2511429 C2 dated 04/10/2014, IPC H03K 17/16, H04L 5/14, “Transceiver for serial interface with galvanic isolation element” - prototype.

Claims (1)

  1. A device for galvanic isolation of logical signals, containing a galvanic isolation element in the form of a pulse transformer (hereinafter referred to as a transformer), an input information encoder, a terminal amplifier of a transmitter, as well as an input threshold amplifier of a receiver and a decoding device, characterized in that the terminal amplifier of a transmitter consists of of two identical amplifiers made in the form of buffer digital amplifiers with three states: “1”, “0” and “open , ”between the outputs of which there is a galvanic isolation element in the form of a transformer, the input of the first terminal amplifier is connected to the output of the encoder, the input of the second terminal amplifier is connected to the output of the encoder via a delay element, the input threshold amplifier of the receiver is made in the form of a threshold amplifier (Schmidt trigger) , between the input and output of which a feedback resistor (R1) is connected, the input of the threshold amplifier of the receiver through the input resistor (R2) is connected to the output of the second terminal amplifier, the output of the first terminal amplifier is connected through a resistor (R3) to the source for setting the threshold of the receiver, the second inputs of the first and second terminal amplifiers are configured to disable the outputs of the terminal amplifiers, while the input signals supplied to the galvanic isolation element are encoded by two unipolar signals, time-shifted by the delay time specified by the delay element.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU188979U1 (en) * 2018-08-23 2019-04-30 Дмитрий Валерьевич Хачатуров Transceiver with galvanic isolation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021332A1 (en) * 1997-10-23 1999-04-29 Analog Devices, Inc. Magnetically coupled signal isolator using a faraday shielded mr or gmr receiving element
RU2131514C1 (en) * 1998-02-24 1999-06-10 Закрытое акционерное общество "НТ-Курс" Device for transmission and reception of bottom-hole information
US20070258513A1 (en) * 2002-09-18 2007-11-08 Bernhard Strzalkowski Digital signal transfer using integrated transformers with electrical isolation
US20100134139A1 (en) * 2003-04-30 2010-06-03 Analog Devices, Inc. Signal isolators using micro-transformers
RU2511429C2 (en) * 2012-07-19 2014-04-10 Федеральное государственное унитарное предприятие "Научно-производственный центр автоматики и приборостроения имени академика Н.А. Пилюгина" (ФГУП "НПЦАП") Serial interface transceiver with galvanic isolation element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021332A1 (en) * 1997-10-23 1999-04-29 Analog Devices, Inc. Magnetically coupled signal isolator using a faraday shielded mr or gmr receiving element
RU2131514C1 (en) * 1998-02-24 1999-06-10 Закрытое акционерное общество "НТ-Курс" Device for transmission and reception of bottom-hole information
US20070258513A1 (en) * 2002-09-18 2007-11-08 Bernhard Strzalkowski Digital signal transfer using integrated transformers with electrical isolation
US20100134139A1 (en) * 2003-04-30 2010-06-03 Analog Devices, Inc. Signal isolators using micro-transformers
RU2511429C2 (en) * 2012-07-19 2014-04-10 Федеральное государственное унитарное предприятие "Научно-производственный центр автоматики и приборостроения имени академика Н.А. Пилюгина" (ФГУП "НПЦАП") Serial interface transceiver with galvanic isolation element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU188979U1 (en) * 2018-08-23 2019-04-30 Дмитрий Валерьевич Хачатуров Transceiver with galvanic isolation

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