Search Engine

Photo Coupler

Add Question

15 Threads found on Photo Coupler
Hello , i am reading an old book about microware couplers, and for calculation of the parameters of the offset coupler they use LDIMS as shown in the photo bellow. does some one know where i can get this function because the book is written at 1988 and google is not very productive. Thanks 136733
Hello, i am trying to interpret the table in order to recreate the geometry shown in the photo bellow in HFSS,based on the attached article. Zo Ze width properties of each cell ,but i cant interpet those parametr into such thing as , length of each cell, how much higher is every cell to its consecutive? is there some example from which i can le
no such part. but you could moldulate a laser diode, run a few inches of fiberoptic cable, and hit a photo detector. that would be over 100 dB of isolation if you packaged it properly, but you would have linearity, noise, and signal level issues to fight.
Hello, i am trying to build a tandem 3d coupler ,but there are many file element both vissualyy and impedance varying,i shown in the attached photo,is there a to for designing such couplers so i could export them to CST? Thanks 136355
In photo coupler Whether I/O Capacitance and Capacitance coupling are same? Can any one clarify me??
Hello All, We are monitoring an AC voltage (200Vac) using a diode and resistor and photo LED of Opto-coupler in series. Here the Reverse break down voltage of diode is 700V, Resistor value is 200K ohm, Opto-coupler reverse break down voltage is 6V. How to analyze impact of negative voltage (i.e. reverse break down voltage)? Where the (...)
The coupler looks like In the catalog photo, one port is terminated with 50 ohms, the other with a N connector.
The dominant pole of an opto coupler is associated with the photo transistor, not the LED. (I'm not sure which side you mean with the unusual term "opto diode"). Usual TL431 circuits already achieve a current source characteristic a higher frequencies. A cascode stage can partly improve the frequency characteristic of a resistor loaded poto t
I have 3 of these I am wondering if they are bad. On one side reads same regardless of polarity 1k 1k 21k on other side of photo coupler polarity reversed polarity 5.6m ohms 5.6 m ohms 5.6 m ohms 5.6 m ohms 9.7 m ohms open These are in circuit tests. Thoughts? will PC 817 versus EL 817 work the same?
how the hell should it work if the diode is in reversed bias while to the cathode vcc is supplied Did you notice that most standard optocouplers, either photo-diode or photo-transistor type, are using a reversed biased junction as photo detector? That's far from being specfic to 6N137 "digital" opto (...)
Optocouplers (Optically Coupled) and Fotocouplers (photocouplers) are same thing. Fotodarlington coupler have a Darlington Transistor in its output.Here are the images of a transistor output Optocoupler and a Darlington Transistor output Optocoupler. 61464 61465
For analog applications, there are two options to speed up an opto-coupler - use it in current source mode, e.g. a cascode circuit or another means that creates a low (AC) load impedance, to overcome miller capacitance. - use it as a photo diode. In this case, you'll need the base terminal. Did you check, if the opto coupler pole is (...)
Hi All I am using Two optocouplers to my inverter mains mode to invereter mode application.I used one opto coupler for zerocrossing detector and another for mains sensing voltage.i connected these optocouplers inputs in it working at all conditions?i am sending schematic as file. if optocouplers inputs connected in (...)
check this one may be helpful
These days I'm trying on a 40db coupler and the isolation is respected to be greater than 25db,while by using HFSS9.0 I got only 20db.How to improve the fact? I used a stripline coupler,a very simple can see from the photo. Hope someone nice can help me ~~please. Another,how to perform the mesh operation?I mean in a model some (...)