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1.2k posts
 
66%
+2 −0
Q&A MOSFET differential to single ended converter intuition

To be clear and protect against possible future edits, here is the circuit being discussed: As you say, this is a differential to single ended converter. In this case, the MOSFETs have likely b...

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

Answer
66%
+2 −0
Q&A Diodes used in mixers

Suppose we have this circuit which is supposed to be an unbalanced frequency mixer. But how does the diode generate a signal with new frequencies at the output?

2 answers  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

66%
+2 −0
Q&A Design high -pass filter with 2 points of the bode plot

Miss Mulan - I am a bit late with my answer. Nevertheless - there is formula which gives you the necessary filter order "n" - as a function of two frequencies and both associated damping figures. ...

posted 2y ago by LvW‭  ·  edited 2y ago by LvW‭

Answer
66%
+2 −0
Q&A Modelling tunnel diode relaxation oscillator

Unless you know the exact formula for the I-V curve, you will never find out anything analytically. Fair warning: very unlikely you will get such formula, since they are strongly non-linear in natu...

posted 2y ago by a concerned citizen‭

Answer
66%
+2 −0
Q&A Low-pass filter after the output DAC in CD players

[In addition to what Olin wrote earlier.] I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind. This entire spectrum must not be pas...

posted 2y ago by Nick Alexeev‭  ·  edited 2y ago by Nick Alexeev‭

Answer
66%
+2 −0
Q&A Results of analysis of Hartley oscillator dont make sense

If you are pursuing engineering then you can't use doodles instead of schematics generated by dedicated (or not) programs. It will take you just the same amount of time, if not less, and the result...

posted 2y ago by a concerned citizen‭  ·  edited 2y ago by a concerned citizen‭

Answer
66%
+2 −0
Q&A Ceramic filter vs ceramic resonator

A resonator cannot replace a filter because the filter has multiple resonances to extend the bandwidth. For AM carrier modulation using a narrow band resonator with 0.5% tolerance of 6MHz or +/-30...

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

Answer
66%
+2 −0
Q&A Ceramic filter vs ceramic resonator

I have a design of a power line communication using the following IC. https://www.yamar.com/datasheet/DS-SIG60.pdf My design is the same as the example circuit in the datasheet of the chip. Th...

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

66%
+2 −0
Q&A Circuit which create ac sine wave from dc pulsed signal

A full wave rectifier converts a sine wave to DC pulsed signal of double frequency. Is there a circuit which does the reverse process?

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

Question AC DC
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+2 −0
Q&A pH Electrode Buffer - Offset when solution grounded

DC offsets in hundreds of mV from different grounds may be coming from either the floating ground or the PE earth. The latter may be from rectified AC line filter noise shunted to PE. The former m...

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

Answer
66%
+4 −1
Q&A How to choose the right value for input voltage ripple of an SMPS?

Which important system design parameters need to be locked in order to estimate the maximum allowable level of the input voltage ripple of an SMPS? I have encountered ballpark figures of <1%, &...

1 answer  ·  posted 3y ago by 2kind‭  ·  last activity 3y ago by Olin Lathrop‭

Question SMPS ripple
66%
+4 −1
Q&A PCB ground planes with isolated voltage

I have designed a PCB that I need to work in which a microcontroller drives a 24 V brushed motor. The input power to the board is 24 V, this is then lowered to 5 V by a step down converter, and thi...

3 answers  ·  posted 3y ago by Alinik‭  ·  last activity 2y ago by KalleMP‭

66%
+2 −0
Q&A Inductance vs frequency

If your question is theoretical (you are dealing with ideal components), then the answer of Olin is just fine. If it is concrete, that's the answer of Andy. In the concrete case furthermore, I wou...

posted 3y ago by coquelicot‭  ·  edited 3y ago by coquelicot‭

Answer
66%
+2 −0
Q&A H(jω) does not exist for unstable systems, but we still use it when designing controllers - contradiction?

I think this is partly semantics. For example, consider designing a compensator for a power supply. The transfer function under consideration is essentially the open loop impulse response of the ...

posted 3y ago by Olin Lathrop‭

Answer
66%
+2 −0
Meta Creating a FAQ: how to read a datasheet

I think this would make a good Paper. I know you want others to collaborate, but that's something that doesn't really work. "Community Wiki" certainly never worked right on SE. Too many cooks ma...

posted 3y ago by Olin Lathrop‭

Answer
66%
+2 −0
Meta Creating a FAQ: how to read a datasheet

I think the Papers section can be suitable. In the category description post it says: Example of paper topics: [...] A survey of scattered information, with the paper putting it all in one place...

posted 3y ago by Mu3‭

Answer
66%
+2 −0
Q&A Electric circuit with antenna

Antennas are not lumped-parameter systems. They may be open circuits or shorts at DC, but this changes as the frequency goes up. They aren't just a bunch of wires anymore at the intended operatin...

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

Answer
66%
+2 −0
Q&A Driving PMSM machine as an AC induction machine

A motor with stator winding and permanent magnets on the rotor, is very different from an AC induction motor. As a result, they require very different drive. You can just apply an AC signal to an...

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

Answer
66%
+2 −0
Q&A Diode like a frequency mixer

Based on this paper on Wiki a diode can be described as a frequency mixer due to the exponential relationship between current and voltage.What I don't get from which point to which point do we meas...

1 answer  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

66%
+2 −0
Q&A Select resistor for a diode

Suppose we have this circuit How do I pick a appropriate value for the resistor R1?

3 answers  ·  posted 3y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

Question LED-driver
66%
+2 −0
Q&A Inductance vs frequency

No. An inductance is an inductance. One way to look at an inductance is as an impedance that is a function of frequency:     Zind = ωL = 2πfL Where Zind is the impedance magnitude of an inducta...

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

Answer
66%
+2 −0
Q&A Motor Controller - What might be the purpose of these resistors?

I have watched multiple teardowns of this module, it is, as you have guessed, a capacitor discharge resistor network. The smoothing capacitor in this module is 550+0.68+0.68 uF 430VDC rating. Peak ...

posted 3y ago by DSI‭

Answer
66%
+2 −0
Q&A $Q$ and $\overline{Q}$ in bistable multivibrator

In this bistable multivibrator which is $Q$ and which is $\overline{Q}$?

1 answer  ·  posted 3y ago by MissMulan‭  ·  last activity 3y ago by Olin Lathrop‭

66%
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Q&A Input offset voltage/bias current noise contribution in operational amplifiers

In noise analysis of operational amplifiers, the following is considered: Noise generated by the external components (resistors in feedback network etc.) Noise generated by the operational ampl...

1 answer  ·  posted 3y ago by Mu3‭  ·  last activity 3y ago by Olin Lathrop‭

Question noise opamp
66%
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Q&A A signal with one mode or with three or more modes

A "discrete" signal can only have a one of a fixed number of values, rather than a continuous value like real numbers. If that fixed number is two then we say that we have a binary system, or a bin...

posted 3y ago by Elliot Alderson‭

Answer