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- coupling - What does an RF coupler actually do? - Electrical . . .
To start with, I've had difficulty finding a good, simple explanation of what directional coupling is I read through Radio Electronics, but the section on directional couplers doesn't give an overview of what it means to "couple " Could someone offer a simple explanation of what "coupling" is and what a directional coupler actually does?
- How does this HF coupler work? - Electrical Engineering Stack Exchange
I came across this coupler design in this link in another question It's designed to be used to couple a small monitoring amount of signal off a 1 kW HF (3 MHz to 30 MHz) signal on a through line
- Opto-coupler high vs low CTR - Electrical Engineering Stack Exchange
I want to understand how the CTR of an opto-coupler is linked with its other parameters, for example its switching speed or time delay between input and output or any other parameter I am using
- high voltage - What types of bus couplers exist? - Electrical . . .
A bus coupler is just a normal circuit breaker (and isolators), no matter where it's installed, or which busses it's connecting A "cross bus coupler" is just a bus coupler that happens to be connecting the two busses of a double-bus switchyard It's not a different type of switchgear and shouldn't be classified as such
- serial - UART isolation with opto-coupler - Electrical Engineering . . .
UART isolation with opto-coupler Ask Question Asked 2 years, 9 months ago Modified 10 months ago
- When do we prefer isolator over optocoupler?
A opto-coupler or opto-isolator (different words for the same thing) is only one method Opto-isolators can be broken into a few broad catagories The most common is a LED shining on a phototransistor As you found, these usually have a few µs to to 10s of µs propagation delay, particularly when turning off
- fpga - Is an opto-coupler fast enough for this application . . .
For high speed an ordinary opto-coupler could be used if there's very low resistance pull-up resistor and an amplifier or a cascode amp is used to prevent Vce voltage changes of the opto transistor during the state transitions Here's one The internals are not revealed in the datasheet but the speed should be enough:
- Hardware debouncing of 3. 3V high signal for an ESP32 turned on via . . .
Also, the current transfer ratio (CTR) of the opto-coupler severely limits transistor current To obtain 10mA of charging current could require 20mA or so of opto-coupler LED current In fact, your circuit as it is will limit capacitor current, for that very reason, CTR
- opto isolator - Electrical Engineering Stack Exchange
Higher than 1kHz is not advised when using opto-coupler, because opto-coupler transistor switch-off time can be significantly longer than shortest PWM pulse Short PWM pulses are somewhat elongated, diminsihing control at low duty-cycle Any capacitance anywhere will further reduce PWM precision
- Opto-coupler output - Electrical Engineering Stack Exchange
Opto-coupler output Ask Question Asked 10 years, 3 months ago Modified 1 year, 8 months ago
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