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Audio Optocouplers - Learn About Electronics
https://www.learnabout-electronics.org/Semiconductors/opto_53.php
Basic Audio Optocoupler. The circuit shown in Fig. 5.3.4, adapted from a design in Newnes Electronic Circuits Pocket Book by Ray Marston (ISBN 10:1-4832-9192-8) uses the 4N25 connected as a phototransistor to pass audio signals whilst …
Audio Isolation With Standard Optical Isolator ...
https://www.electro-tech-online.com/articles/audio-isolation-with-standard-optical-isolator.739/
2015-6-10 · This eliminates the non-linear LED input voltage to current relationship, with the opto isolator output current typically being quite linear with respect to the input current, especially for low current levels. Below is the LTspice simulation of such a circuit using the 4N25, a common and representative general purpose opto isolator.
Linear opto isolator circuits – Electronic projects circuits
https://www.eleccircuit.com/linear-opto-isolator-circuits/
2018-10-10 · Linear opto isolator circuit. This is the linear opto isolator circuits that use a few parts and cheap. In circuit we use the opto compiler ICs number of MOC 5010 as a base. It can use it in many ways. For example, separate the circuit from the power line, send an audio signal, Electronic medical, etc.
Application Notes—Analog Optical Isolators
https://www.perkinelmer.com/CMSResources/Images/44-3429APP_AnalogOpticalIsolatorsAudioApps.pdf
2010-3-17 · The circuit application and AOI characteristics will influence the choice of circuit to use. In Figure 1a to 1f, gain vs. I F curves are given for each circuit, as well as input impedance and gain formulas. Once the proper circuit function …
Linear Optocoupler Circuit - ElectroSchematics.com
https://www.electroschematics.com/linear-optocoupler-circuit/
· This linear optocoupler is built with MOC5010 and can be used to isolate a circuit from main grid, audio interface, in medical electronics and many other applications. Because of its high isolation resistance (10 11 Ω), MOC5010 is used in applications where a circuit is powered directly from main power. With a bandwidth from 5 Hz to 100 kHz ...
Optocoupler Circuits | Nuts & Volts Magazine
https://www.nutsvolts.com/magazine/article/optocoupler-circuits
1 day ago · OPTOCOUPLER BASICS. An optocoupler device can be simply described as a sealed, self-contained unit that houses independently-powered optical (light) Tx and Rx units, that can be coupled together optically. Figure 1 shows the basic form of such a device. Here, the Tx unit is a LED, but the Rx unit may take the form of a phototransistor, a photo ...
Linear DC Signal Opto-Isolator / Optocoupler Circuit
https://www.electroschematics.com/linear-dc-signal-opto-isolator/
2015-3-21 · Linear DC Signal Opto Isolator. This simple circuit provides better than 1% accuracy in optically coupling a DC voltage signal. To compensate for the non-linearity of the optical isolator, an identical device is connected in the feedback loop. To further enhance stability, both optical isolators are located inside the same IC.
Optocouplers - Homemade Circuit Projects
https://www.homemade-circuits.com/optocouplers-working-characteristics-interfacing-application-circuits/
2019-9-21 · Optocoupler Pinout. The diagram above shows the pinout diagram of the typical optocoupler in DIP package. The device is also known as opto-isolator since no current is involved between the two chips, rather only light signals, and also because the IR emitter and IR detector feature a 100% electrically insulation and isolation.
Analog Optical Isolators VACTROLS®
http://denethor.wlu.ca/pc300/optoisolators/analogoptoisolatorintroduction.pdf
2006-9-27 · 100 to 1000 µsec. In a limited circuit this is fast enough to catch high peak amplitudes but not so fast as to cause obvious clipping. The turn-off will take as much as 100 times longer so the audio circuit will return to a normal gain condition without a disturbing “thump” in the speaker. Figure 2. Resistance vs. Time Noise
Audio Optocoupler? | All About Circuits
https://forum.allaboutcircuits.com/threads/audio-optocoupler.102434/
· The OP stated it was for a Ham radio so it likely doesn't need to go over 5kHz for voice. But an opto with a phototransistor should be fine even for music audio if it is configured in a follower configuration, since the Miller capacitance that reduces the frequency response in a common-emitter configuration doesn't come into play.
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