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Posts tagged capacitor

Synonyms: capacitors condenser condensers

Subtag of component · 2 child tags

Anything related to capacitors (also known in the past as condensers).

A capacitor is a 2-terminal passive electrical component that exploits the properties of electric fields created by electrical charge accumulation on conductor surfaces.

A common example of capacitor is a couple of parallel metallic sheets separated by an insulator.

The term condenser is no longer used (it was still commonly in use around the '60 of the 20th century), but it can still appear in old literature and in some peculiar applications (like condenser microphones).

TERMINOLOGY NOTE: Although the term condenser is considered obsolete in English, there are other languages where the literal translation of the English term "condenser" is the current and correct name of capacitors, e.g. Italian condensatore, German Kondensator and French condensateur. This is important to avoid wrong translations to and from technical English.

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Q&A Ceramic capacitor "memory" effect?

I have run into an interesting phenomenon related to ceramic capacitors. This question is part of the effort to understand the issue, and eventually work around it. But first, some background of ...

2 answers  ·  posted 4mo ago by Olin Lathrop‭  ·  last activity 4mo ago by TonyStewart‭

Question capacitor
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Q&A derating MLCC ripple current for transient current spikes

This graph - MLCC temperature rise vs ripple current RMS & frequency If I had a 10 us current spike every 100 000 us (akin to a half-sine wave and then the rest of 9999 sine waves missing), ...

2 answers  ·  posted 6mo ago by kellogs‭  ·  last activity 6mo ago by TonyStewart‭

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Q&A Current Flow in the OFF Time of a Switching Power Supply

I am having a difficult time picturing the flow of current and the role of the capacitor during the OFF time of a buck converter. Here is my understanding so far. During the ON time the magnetic fi...

1 answer  ·  posted 3y ago by jm567‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Critically damped oscillation issue

I have a question about this circuit:(critically damped oscillation) For a critically damped oscillation for a series RLC circuit the equation of current has this form I(t)=D1te^(-at)+D2e^(-at) ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Series RLC circuit

How to find the equation of current of the RLC circuit after the switch is moved?

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Parallel RLC circuit

How to find the equation of voltage of the top common node of R1,L1 and C1 after the switch is moved?

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Electrolytic vs ceramic capacitors about self-resonance frequency

Which capacitors have smaller self resonance frequency?I would bet my money on electrolytic capacitors because they are usually much bigger than the ceramic capacitors however I don't know if they...

1 answer  ·  posted 2y ago by MissMulan‭  ·  edited 8mo ago by Lorenzo Donati‭

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Q&A Capacitor in 2nd stage of opamp

Inside a op-amp after the stage where the differential signal is converted to single ended , there is further amplification of the DC signal.For AC signals there is a capacitor parallel to the tran...

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 8mo ago by Lorenzo Donati‭

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Q&A Electrolytic capacitor lifetime rating

If you search through the electrolytic capacitor offerings from distributors like Farnell, RS, Digikey or Mouser, you find that the maximum life-time rating is commonly quoted as 5,000 or 10,000 ho...

1 answer  ·  posted 4y ago by Andy aka‭  ·  last activity 8mo ago by Lorenzo Donati‭

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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 9mo ago by dcsuka‭  ·  edited 9mo ago by dcsuka‭

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Q&A How to convert dv/dt of noise into frequency for filter capacitor selection?

Noise can be coupled between signal lines through parasitic capacitance formed between these signal lines, as $i = C\frac{dv}{dt}$ where C is the capacitance between the signal lines. Another wa...

1 answer  ·  posted 9mo ago by Elleanor Lopez‭  ·  last activity 9mo ago by Olin Lathrop‭

Question capacitor filter
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Q&A Role of C2 (bypass capacitor)

I have been reading about thermal noise in resistors and I have a question: Suppose we have this circuit: Is C2 here to protect the voltage source from thermal noise?

2 answers  ·  posted 11mo ago by Volpina‭  ·  last activity 11mo ago by Andy aka‭

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Q&A Unexpected impedance spike when paralleling capacitors

I was watching a video from EEVBLOG about bypass capacitors, and he presented a theory that randomly connecting different values of capacitors in parallel can create unexpected impedance spikes: ...

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

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Q&A Capacitors of voltage regulators [closed]

Assuming we have a voltage regulator : Why do we have to ground Vin and Vout using 2 capacitors just like that?Co could be to provide a low resistance path to GND at high frequencies but what is...

0 answers  ·  posted 2y ago by MissMulan‭  ·  closed 2y ago by Olin Lathrop‭

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Q&A Voltage and Current of capacitor

How do I find the voltage of the capacitor and the current through the capacitor after the switch is closed?

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by MissMulan‭

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Q&A Capacitor ESR vs. Impedance

One of the ceramic capacitors that I've found(link to the capacitor) specifies the following characteristics at 10 kHz: The difference in value is quite significant, almost 100 fold. Which grap...

3 answers  ·  posted 3y ago by 2kind‭  ·  last activity 3y ago by TonyStewart‭

Question capacitor ESR ESL
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Q&A What is the purpose of paralleling capacitors on the input/output of a power converter?

In the design of a power converter, picking the appropriate capacitors for the input and output of the converter is quite important. It is relatively easy to calculate the necessary values for a gi...

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

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Q&A LC Filter and Capacitor Considerations [closed]

I've been experimenting with LC filter circuits on the output of a SMPS I recently bought because it was too high for the circuit I'm making. After hooking up many different combinations, I found t...

0 answers  ·  posted 3y ago by jm567‭  ·  closed 3y ago by Olin Lathrop‭