Circuits and methods for bi-directional data communication over isolation channels
A data communication and circuit technology, used in electrical digital data processing, electrical components, digital transmission systems, etc., can solve problems such as low breakdown voltage, data communication delay signal distortion, and data damage.
Active Publication Date: 2019-03-05
SEMICON COMPONENTS IND LLC
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Problems solved by technology
However, current methods for implementing galvanic isolation have specific disadvantages, such as low breakdown voltage, crosstalk between isolated channels, data communication delays, and / or signal distortion, which can lead to data corruption
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[0013] The present disclosure is directed to circuits, apparatus and methods for bidirectional data communication of multiple (bidirectional) data channels using unidirectional electrically isolated channels (eg, two unidirectional differentially isolated channels). The methods described herein can be used for data communication between different power domains in industrial and or automotive applications including, for example, power conversion, gate drivers, motor control, etc. For example, data may be transferred from a first (eg, primary, master, etc.) data communication circuit (eg, in a first power domain) to a second (eg, secondary, slave, etc.) data communication circuit using a first unidirectional isolated channel. The communication circuit (eg, in the second power domain), while data from the second data communication circuit to the first data communication circuit may be communicated using the second unidirectional isolated channel. The data communicated on each of ...
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The invention relates to a circuits and methods for bi-directional data communication over isolation channels. In a general aspect, a data communication circuit can include a transmitter configured totransmit a first digital bit stream via a first unidirectional isolation channel. The data communication circuit can further include a receiver configured to receive a second digital bit stream via asecond unidirectional isolation channel. The first unidirectional isolation channel and the second unidirectional isolation channel can be defined on a common dielectric substrate. The data communication circuit can further include a crosstalk suppression circuit configured to provide at least one negative feedback signal to suppress crosstalk between the transmitter and the receiver due to parasitic capacitive coupling between the first unidirectional isolation channel and the second unidirectional isolation channel in the common dielectric substrate.
Description
technical field [0001] The present description relates to circuits for communicating data between electrically (eg, capacitively) isolated circuits. Background technique [0002] The transfer of data such as control, feedback and status information in automotive and industrial applications or electrical systems can involve transferring data between different power domains where such power domains can have considerable differences in the voltages used in those power domains ( For example, in some embodiments, tens of thousands of volts). For example, a first data communication circuit in a first power domain may transmit data to a second data communication circuit in a second power domain. In such applications, in order to prevent (block, etc.) stray currents, such as currents due to ground potential differences and / or currents from alternating current (AC) sources, between the first data communication circuit and the second data communication circuit (eg, between different...
Claims
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IPC IPC(8): H04B1/40H10N97/00
CPCH04B1/40H04B3/34G06F13/4282H04B3/32H04L25/085H04L27/04H04L27/06H04L25/0272H04L27/2071
Inventor S·E·拉赫曼J·康斯坦丁诺
Owner SEMICON COMPONENTS IND LLC