Intelligent, isolated half-bridge power moduleĮlectrostatic protection for a shielded MR sensorĮlectronic apparatus having cooling system Temperature protection device for air cooled electronics housingĪrrangement for inductive signal transmission between the chip layers of a vertically integrated circuit High density inter-chip connections by electromagnetic coupling Logic isolator with high transient immunityįiltered air, temperature controlled removable computer cartridge devices Integrated circuit transformer with inductor-substrate isolation Magnetically coupled signal isolator using a Faraday shielded MR or GMR receiving element Ultra-low power magnetically coupled digital isolator using spin valve resistors Method and apparatus for galvanically isolating two integrated circuits from each other Magnetically coupled signal isolator using a faraday shielded MR or GMR receiving element The best isolation devices are well documented, predictable, reliable and intuitively easy to apply these points are covered in detail in the paragraphs below.Isolator for transmitting logic signals across an isolation barrier.External magnetic and electric fields can degrade system performance, so the ability of an isolation device to reject external field interference is critical. EMI is a source of potential data corruption, especially in medical applications that acquire low-amplitude signals, such as electrocardiographs (ECG).Minimal electromagnetic interference (EMI) and high external electrical and magnetic field immunity.Isolator lifetimes of 20+ years are now required by applications, such as HEV/EV, solar and wind energy systems, and typically operate in elevated temperature environments over 120☌.This is especially true in isolated high-speed data systems that rely on tight timing relationships. Isolators vulnerable to significant changes due to temperature, current and/or device age force the designer to give up design margin, reducing system performance.Well defined, key operating parameters that exhibit little change over voltage, temperature and device age.CMOS digital isolators give designers the ability to create lower cost, smaller size, higher performance, lower power, and more reliable isolated circuits than competing optocoupler solutions.Īdvantages of SiLabs CMOS digital isolators against competing optocouplers include: Recent breakthroughs in silicon isolation technology allow these improvements to be possible. Optocouplers have been the unchallenged signal isolation solution for more than four decades, but digital isolators are becoming ever more popular due to their superior performance and reliability. When Vin is high, the transmitter generates an RF carrier that propagates across the isolation barrier to the receiver. Data is transferred from input to output using simply on/off keying (OOK). Two identical semiconductor dies are connected together within a standard IC package forming an RF transmitter and receiver separated by a differential capacitive isolation barrier. Similarly, Figure 1b displays the basic form of a digital isolator. Both the transmit and receive units are contained within a single sealed package with an insulating film or dielectric between the input and output. ![]() Current flowing through the LED causes emitted light to pass through the dielectric where it strikes the photo detector causing current to flow that biases the output transistor on. The signal input can be considered as the transmit unit (LED) and the signal output can be considered as the receive unit (photo detector or some other type of photosensitive semiconductor element). Both optocouplers and digital isolators are used to prevent high voltages from affecting the system receiving a signal.įigure 1a displays the basic form of an optocoupler. A digital CMOS isolator is a component that transfers electrical signals between two isolated circuits by using a high-frequency carrier. An optocoupler also called opto-isolator, photocoupler, or optical isolator is a component that transfers electrical signals between two isolated circuits by using light.
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