@W5VO think of a handheld LCR meter (autoranging, but not much more sophisticated than that)

@TeilZeitGott Please stop spamming your questions into this chat room.

@W5VO . . Thank you.

alright alright alright

@tellzeitgott No, you don't fake it till you make it. You make it. You do the work and work hard, lose sleep and make it.

@ScientistSmithYT Thanks, way better than the old one I though

@ScottSeidman , do you know if the 60601 particular standard for ECG require a self-test circuit? I've read the -2-27 yesterday, but didn't see anything about self-test. I'm in the process of reading the -2-25.

I still have some Westvleteren in my basement for @kortuk, where is this guy these days?

@NickAlexeev I don't really know -- I don't see anything about it in the TOC of -2-25, which is where it should probably be. The FDA ecg guidance doc is fda.gov/regulatory-information/search-fda-guidance-documents/…

One thing to be very careful of is the firmware, though. I can't imagine a special ECG requirement for self-test -- as a plain old vanilla analog ecg wouldn't have one. You need to meed all the hardware and firmware guidances.

IEC 62304 might be the relevant document -- sunstonepilot.com/2018/09/… -- I would think self-testing comes into the risk-management process.

oops, I mean software and firmware. Interestingly, I know people who recommend skewing toward FPGA's over microcontrollers, because the standard is black box testing instead of white box.

hello respected fellows, come on I don't want to spam this chat for no reason. I am stuck at this problem please help

the problem is with op-amp of finite gain, infinite input resistance, and finite output resistance. tried all the tools I got and still zero success.

simplifying the circuit it turns out to be a circuit with an independent voltage source with dependent Voltage source.

so im stuck in finding the transfer characteristic.

@jippie You can send it to me and I'll take care of it.