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Q&A PTC resettable fuse leakage current

That's a marketing blurb. Look at the real datasheet. I just checked a polyfuse datasheet, and see that there is usually only about a 2.5 to 3.0 ratio of trip current to hold current. That shoul...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

Answer
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Q&A Most correct term for radio switching noise?

I don't think there is a formal term that means exactly what you describe. Switching transients generally means short term glitches that might cause noise, usually resulting from power being switc...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

Answer
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+1 −0
Q&A Adding resistance to varactor circuit

in my schematic we must add R1 correct? Yes that works except: - One last question if we deliver voltage to a house are there varactors which can handle 120V AC No, they don't exist.

posted 4y ago by Andy aka‭

Answer
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Q&A Adding resistance to varactor circuit

If we a varactor and we want to control let's say the resonant frequency of the circuit ,in my schematic we must add R1 correct?Else we create a low resistance path for current to flow not through ...

2 answers  ·  posted 4y ago by MissMulan‭  ·  edited 2y ago by Lorenzo Donati‭

Question alternating-current capacitance varicap-diode
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Q&A Current and voltage of inductor

For reference, here is your circuit properly drawn with component designators: The question is what happens when the inductor current starts at 0, then the switch is closed. The first observati...

posted 4y ago by Olin Lathrop‭  ·  edited 4y ago by Olin Lathrop‭

Answer
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Q&A A signal with one mode or with three or more modes

The term "Discrete" uses to describe a signal with two modes, but is there a term to describe a signal with just one mode or with three or more modes? Question update: Also, isn't a wave with just...

3 answers  ·  posted 4y ago by deleted user  ·  edited 4y ago by deleted user

Question terminology signal-processing
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Q&A SPI modes difference

What is a difference between SPI stream and memory mapped SPI? PS SPI is a peripheral.

2 answers  ·  posted 4y ago by FrankLEE‭  ·  last activity 4y ago by DavidCary‭

Question SPI
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Q&A A signal with one mode or with three or more modes

with just one mode Others have already explained that "discrete" means a finite set of values, not just two. This is to point out that having just one "mode" (it seems you mean symbol) doesn't ma...

posted 4y ago by Olin Lathrop‭

Answer
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Q&A Current and voltage of inductor

After the switch is closed : The general formula for finding the current through the inductor is this: where If is the current through the inductor after infinite time,Io is the current of th...

posted 4y ago by MissMulan‭  ·  edited 4y ago by MissMulan‭

Answer
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Q&A Design high -pass filter with 2 points of the bode plot

You still haven't said why you need, or even what order, type, etc. Assuming it's a 2nd order, an exact solution involves creating a generic transfer function and then solving a system of equations...

posted 3y ago by a concerned citizen‭

Answer
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Q&A pH Electrode Buffer - Offset when solution grounded

It seems you have ground loops, and possibly having multiple ground connections shorting out your signals. Your hand-sketched diagram is a good start, but you need to show all the ground connectio...

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

Answer
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Meta A community-maintained list of abbreviations used in electrical engineering?

I was the one who started that list Elsewhere. I thought the same as you, that a few common abbreviations would be good to have in a single place. However, it quickly turned into a mess. After o...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A Low-pass filter after the output DAC in CD players

The oversampling is said to simplify the LPF yet the better reason is that it improves the SNR. Lower noise comes from better image rejection, lower filter ringing, and significantly lower group d...

posted 2y ago by TonyStewart‭  ·  edited 2y ago by TonyStewart‭

Answer
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Q&A Pick & place file generated by Altium does not match the actual component rotations/positions

Does your produced CPL file correspond to the Altium layout, or to what Eurocircuits Assembly Visualizer is showing? Open the CPL file in Excel and check. If the Altium output is wrong, I'd say ch...

posted 3y ago by DSI‭

Answer
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Meta A community-maintained list of abbreviations used in electrical engineering?

I support this idea and think that it might fit the Papers category, although it should be allowed to have multiple users maintain and moderate it. It should be a brief glossary for a quick look-up...

posted 2y ago by Lundin‭

Answer
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Q&A Op Amp Hartley oscillator

You are asking how to analyze this circuit: Forget about what you think it should be called. Before attempting to model specific aspects, first try to understand the circuit. The opamp provide...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

Answer
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+1 −0
Q&A Small signal analysis of BJT in saturation region

A resistor is not a good model for a saturated BJT. According to your graphs it is, but those are simplified. There isn't really a single slope for all base currents as your graph shows. Even if...

posted 3y ago by Olin Lathrop‭

Answer
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Q&A Results of analysis of Hartley oscillator dont make sense

I want to find the conditions of oscillation of the following Hartley oscillator.I have attached a load (ZL) to my Hartley oscillator I have written KCL for nodes A,B: For node A: $$\frac{V_{A...

3 answers  ·  posted 3y ago by MissMulan‭  ·  last activity 3y ago by TonyStewart‭

Question voltage oscillator transfer-function hartley-oscillator
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Q&A Results of analysis of Hartley oscillator dont make sense

MissMulan - at first, you should show which nodes are connected (crossing points). Secondly, where are the voltages Vo and Vin in your diagram? Please keep in mind, that it is essential to OPEN t...

posted 3y ago by LvW‭  ·  edited 3y ago by LvW‭

Answer
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Q&A Design high -pass filter with 2 points of the bode plot

Filter design 101 given hypothetical high-pass (HPF) filter -3dB gain HPF at fc attenuation of -8dB at fc/2 Assumptions gain = 0 dB at f>> fc Ripple between -3dB and 0 dB...

posted 3y ago by TonyStewart‭  ·  edited 3y ago by TonyStewart‭

Answer
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Q&A Biasing a differential opamp input

According to the datasheet, with the supply you are using the input voltage range is V- to V+-1.5. With your 7 V supply, that comes out to 0 to 5.5 V. You say the maximum differential input volta...

posted 11d ago by Olin Lathrop‭

Answer
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Q&A Output swing of OPA859-Q1 when Operating from Single 3.3V Supply

Andy already gave you a direct answer, but I want to point out a confusion: Is the maximum swing is 2.4V when operated from 3.3V Supply. Maximum output voltage and maximum output swing are not th...

posted 18d ago by Olin Lathrop‭

Answer
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Q&A TIA Frequency Response

The labels on your expected frequency response graph and the schematic of what you simulated are too small to see, so I can only answer with general observations. The Analog Devices schematic show...

posted 22d ago by Olin Lathrop‭  ·  edited 22d ago by Olin Lathrop‭

Answer
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Q&A Geophone amplification circuit behavior

Is it reasonable to use function generator as differential input the way I tried? In theory, it should have worked, but it's asking for lots of common mode noise. Even with the output apparently ...

posted 7d ago by Olin Lathrop‭

Answer
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Meta Should we have a sub-forum for less structured, forum-style discussions?

I was about to post a question to another music DSP forum about collecting free and open learning materials to a website. I wanted to post such a great idea to a non-ad-supported website, such as C...

2 answers  ·  posted 1mo ago by mavavilj‭  ·  last activity 1mo ago by Monica Cellio‭

Question discussion feature-request