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Yeah correlate those spikes to events in your circuit. Is it each fet switching or maybe only one phase?
As said figure out if it’s real: attach scope gnd to your circuit then attach the scope probe to its ground. That shows scope pickup.
It was the topology shown here but flipped upside down using a P instead of N.
https://youtu.be/eHGumuqh--Y
That charged a cap (cog/npo) and was reset with another transistor. There were a couple other tricks in it but that’s basically it.
It really needs some extra voltage to work well...
PI is a type II compensator. PID with two more poles is TypeIII.
How much voltage do you have? I made a custom 300khz modulator with a triangle using a transistor current source topology. But I had 10V and made a triangle between maybe 1-4V. The triangle was very good.
Sure an amplifier is defined by vin*gain=Vout. So in a unity gain follower example with Vout=1 and gain of 1 million Vin must be 1uV or specifically the input might be 1.000001V into the non-inverting input and 1V on the output and inverting input.
Do the math for your scenario. It works...
I'll jump in. I've long used a program called "Keynote NF" for basic note taking. It has tabs and hierarchy and means that I have a good place to put anything I think of as soon as I think of it.
To start a design you take notes. Write the requirements, identify questions and start...
You don’t want a divider in front of the regulator you want a single resistor in series with the input. Leave the input bypass caps right at the regulator input. Size the resistor to drop half the voltage (or so) at 60ma and it should help (it’s also good for noise and short circuit current...
In general the more switches you have the less power each switch needs to process and therefore dissipate. As you point out higher switch topologies can also make better use of the transformer.
In low power applications the 'cost' of a switch and associated gate drive is comparatively high...
0.7V of steady state ripple would surprise me. Run a simulation to see if it’s possible or not. Could get a dual package and put 2 in series if you’re worried. And/or put an R in series too.
Zener is fine just might not be necessary (and makes more watts when it’s in action).
State is declared as logic [3:0], not ASCII. You happened to use parameters with human readable names to define it but that doesn't make it ASCII.
You'd need to explicitly code your own mux or if/then/else statement to assign a string the name of your state based on the value state if you want...
Re: Need suggestion to select an (1GHz) Oscilloscope (Tek 5 series Vs R&S RTO2000)
You sure you have the right price? I see a starting price of 14500 for the 5 series with 350Mhz bandwidth.
I recently added a Tek3 series to our lab and I like it. The UI isn't totally amazing but it's good...
Yeah and understand that driver current is a peak value that tells you how quick the driver can slew the parasitic capacitance of your mosfet. The average current out of the driver will be tiny. It only hits large peak values during the gate transitions (nano seconds).
Digital isolators only go one direction. So you can't use one isolator channel as both an input or output.
It is possible to multiplex multiple signals into the inputs of the isolator so long as you have a way to control or synchronize the mux.
You can also run an SPI GPIO expander through...
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