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66%
+2 −0
Q&A Analysis of LC circuit using intuition

A quick intuitive way of looking at this circuit is that the voltage source, L1, and L2 can be thought of as a lower voltage source with a single lower inductance in series. This is the same as fi...

posted 9mo ago by Olin Lathrop‭  ·  edited 9mo ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Power polygon and matching ground

For power polygon that primarily carry DC, how critical is it that it is located above a ground plane? Practically not at all. Power planes are overrated. Think about what problem you are really...

posted 4mo ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Purpose of resistance between SENSE/FORCE line of power supply

Furthermore, an amplifier symbol called "gm" is labeled as transconductor. What does it do? Transconductors are voltage-controlled current sources, but what are they doing here? The diagram lo...

posted 11mo ago by Nick Alexeev‭

Answer
66%
+2 −0
Q&A Connector rated voltage vs IPC-2221B and IEC 62368

If I use this connector at its rated working voltage, does that automatically mean I am not complying to IEC 62368 safety standard? The pattern you reference seems to assume one side of all eight ...

posted 9mo ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A What is connector pitch and how to measure it?

Pitch is defined as the center-to-center measurement between two pins/legs of the component. Connectors in particular are always categorized by manufacturers/retailers based on pitch, so it is the...

posted 10mo ago by Lundin‭  ·  edited 10mo ago by Lundin‭

Answer
66%
+2 −0
Q&A Thick trace or a Polygon?

Not much. If the wide power trace is good enough to handle the current, then it's, well, good enough. If you really don't have anything else to do with the copper space, then you might as well ma...

posted 4mo ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A High power LC circuit with programmable resonant frequency

What you are asking for is totally unrealistic, and your numbers don't add up. With 10 mH and 80 µF, the resonant frequency is 178 Hz. Getting down to 1 Hz even with 10 mH would require over 2.5 ...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Oscillator with non-rechargable battery

There actually seem to be two different questions here. Can a primary (non-rechargable) battery be damaged by forcing reverse current thru it? Yes. Primary batteries are only intended to source ...

posted 2y ago by Olin Lathrop‭  ·  edited 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Meta Apparent loss of reputation in last 24 hours

Has anyone else noticed a loss of reputation recently. I thought I checked yesterday and my reputation was a hundred points higher at 1889. Now it is at 1789. My vote summary doesn't indicate a los...

1 answer  ·  posted 2y ago by Andy aka‭  ·  last activity 2y ago by Monica Cellio‭

Question discussion bug support
66%
+2 −0
Q&A What is dynamic resistance? Is it related to differential resistance or to incremental resistance?

What is the concept behind the dynamic resistance that often pops up when dealing with non-linear components and the circuits in which they are employed? Is the concept related to other terms like...

1 answer  ·  posted 2y ago by Lorenzo Donati‭  ·  last activity 2y ago by Lorenzo Donati‭

Question dynamic-resistance
66%
+2 −0
Q&A Is the noise of op-amps and ADCs Gaussian, possibly with zero mean?

I understand that white noise is not always Gaussian. In general, is the $V_{pp}$ and $V_{RMS}$ noise stated in operational amplifier and ADC datasheets Gaussian? And is its mean zero? Any exemptio...

1 answer  ·  posted 2y ago by Joel‭  ·  last activity 2y ago by Lorenzo Donati‭

Question noise ADC opamp
66%
+2 −0
Q&A Titanic submarine control considerations

One of the challenges with this particular controller is that it's wireless. Wireless devices need a) a clear enough RF channel to the receiver and b) a suitable power supply, namely batteries. B...

posted 2y ago by Pogo‭

Answer
66%
+2 −0
Q&A Is ESD overhyped?

I know of a designer that didn't add ESD protection on a mass manufactured product in the field. They had to replace almost 10 thousand units, because they kept popping in certain low humidity and ...

posted 2y ago by Hawk2020‭

Answer
66%
+2 −0
Q&A Why do I need electrodes for ECG measurements?

When recording an ECG signal, the raw signal is taken from the body and sent into an ECG amplifier to amplify the signal to a suitable range and remove common mode and other types of noise. Measur...

1 answer  ·  posted 2y ago by Carl‭  ·  edited 2y ago by Lorenzo Donati‭

Question instrumentation-amplifier ECG measurement
66%
+2 −0
Q&A Why do I need electrodes for ECG measurements?

The electrodes electrically connect to the skin in order to pick up tiny signals produced by the heart muscles. Electrically you're a bag of saltwater. Your skin (the bag) has a relatively high r...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Variant of a Mosfet's Gate-Source protection

Let's say a 100V voltage spike arrives at +12V and the TVS diode clamps it to 25V. Q2 may or may not be activated. Will this circuit ensure a V_gs lower than 25V for the mosfet Q1 ? Any catch to it...

1 answer  ·  posted 2y ago by kellogs‭  ·  last activity 2y ago by Olin Lathrop‭

Question MOSFET protection overvoltage TVS
66%
+2 −0
Q&A Variant of a Mosfet's Gate-Source protection

If the TVS truly clamps the "+12V" line to 25 V, then the VGS of Q1 can't exceed 25 V. However, if you want to limit the gate voltage, limit the gate voltage. A Zener between gate and source guar...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Floating circuitry and diodes

is the "X" point floating when there is no 12V applied ? Perhaps over a limited range, depending on whether the 12V line is left open or connected to something other than 12V. Case 1: The volt...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Choosing between common-drain JFET amplifier, and common-source

The first circuit uses the FET in follower mode. That means it works as an impedance buffer with a gain a little below 1. Such configuration can be useful to turn a high impedance signal into a l...

posted 2y ago by Olin Lathrop‭  ·  edited 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A High power LC circuit with programmable resonant frequency

I intend to build a high-power series LC resonant circuit for the purpose of generating strong magnetic fields at a wide range of frequencies, mostly audio range (1-5000 Hz). The inductor coil is a...

1 answer  ·  posted 2y ago by dcsuka‭  ·  edited 2y ago by dcsuka‭

Question LC-network capacitor power inductor AC-power
66%
+6 −2
Q&A Titanic submarine control considerations

The submarine built by OceanGate went missing on 18th June 2023. A lot of online criticism was directed towards the control hardware of the submarine - Logitech F710 controller. However, why i...

3 answers  ·  posted 2y ago by Elleanor Lopez‭  ·  last activity 2y ago by Pogo‭

Question safety control
66%
+2 −0
Meta Should posting on Meta affect reputation?

When we launched this community, we did not yet have the ability to set different reputation grants for different categories. We've had this for a while but we failed to follow up before now, sorr...

1 answer  ·  posted 2y ago by Monica Cellio‭  ·  edited 2y ago by Olin Lathrop‭

Question discussion status-completed
66%
+2 −0
Q&A How to convert dv/dt of noise into frequency for filter capacitor selection?

It looks like you've sort of re-discovered a motivation for Fourier analysis. The difference between looking at slope versus frequency content is exactly the difference between time domain and fre...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A micro-RF connector crimping options

I've not seen them sold separately through distributors like Mouser and such, and have not seen any hand tools for these. I found this document and this video - it looks like the machines are semi-...

posted 2y ago by DSI‭  ·  edited 2y ago by DSI‭

Answer
66%
+2 −0
Q&A How to change the polarity of an input using a single switch?

I have an mcu pin and I want to sense a voltage up to 24V to 36V. I want to connect some outputs on the board I'm designing and I don't know whether those outputs will provide a voltage or will be...

1 answer  ·  posted 2y ago by DeadMouse‭  ·  edited 2y ago by Lorenzo Donati‭

Question microcontroller BJT