Questions tagged [ripple]
Small unwanted residual periodic variation of a direct current (dc) output.
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Is there any downside to using a larger than needed smoothing capacitor?
I work with low-power DC voltage regulators. I am already aware of the formula to calculate the size of smoothing capacitor(s). This can be an iterative process of testing one size with a scope and ...
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Ripple voltage filtering capacitor
I'm an self-taught high schooler who's trying to understand how filtering capacitors work. I've searched and read multiple websites trying to understand how filtering works. At the point where I am, I'...
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How does ripple degrade electrolytic capacitors?
How does excessive ripple current degrade electrolytic capacitors? What processes are involved and how do they work?
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Capacitor multiplier does not remove ripple
I'm trying to build a capacitor multiplier to remove ripple from a power supply. The power comes from a dc-to-dc converter (MC34063). The actual load is a circuit that has multiple modes of operation ...
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If cost can be ignored, is a higher-value capacitor for ripple suppression always a good choice?
To calculate what value of a capacitor is suited for ripple suppression,
we can use this formula:
Cmin = Load Current / (Ripple Voltage X Frequency)
It seems a ...
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Ripple reduction with LC filter
This seems like it must be a common problem but I don't find a clear answer anywhere, maybe my approach is wrong.
I have a DC-DC regulator in my circuit, which has a ripple of 50mV at 200kHz, the ...
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Full-wave bridge rectifier with capacitor filter and ripple voltage
According to various sources, the ripple voltage of a full-wave bridge rectifier is
$$ V_r = \frac{V_s}{2}fCR $$
where \$V_s\$ is the peak of the input voltage source, \$f\$ is the frequency, \$C\$ ...
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How to improve current control loop in power supply?
I'm working on MCU programmable bench power supply. Its range is 0-50V and 0-3A programmed in 10mV and 10mA increments. It will be published as open hardware and source code that anyone can use it if ...
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Bridge rectifier circuit with a step-up transformer
I have been experimenting with a full-wave bridge rectifier in LTspice.
I am trying to step up 120 V AC/60 Hz to 1 kV DC for a load of around 2 kΩ. The step-up transformer has a ratio of 25:9. The ...
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Does voltage ripple matter to a relay driven by a transformer?
If you have a relay that accepts actuation voltages of between 9-25V does it matter if you have a relatively large amount of ripple on that line?
I ask because my design steps down 230V-15V with a ...
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Ripple rejection of capacitance multiplier when compared to linear regulators
There are some posts and discussions how a circuit popularly called a “capacitance multiplier” could reduce low frequency ripple noise (at 50/60 Hz or 100/120 Hz) and could perform better than common (...
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LTSpice voltage source understanding
I came across this Short Video on Youtube by MicroType Engineering, link here.
His simulation on LTSpice was the below:
I tried the simulation on LTSpice myself. However I am curious as to what the ...
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What is a capacitor ripple current?
Suppose I have a simple full wave bridge rectifier, with resistive load. Is capacitor ripple current a charging or discharging current? Or maybe it is an avarage/RMS of any current flowing through a ...
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Current Ripple in Ceramic Capacitor Selection
I need to choose a ceramic capacitor (ESR<10mOhms, 5VDC) for my buck converter application, whose value should be around 300uF. The reason for going for a ceramic capacitor is the low ESR they have....
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Capacitor as a ripple filter in the rectifier circuit - difference in charging and discharging time
Most of the times attached picture is used to depict the use of Capacitor as filter in the rectifier circuit. I guess, i understand the broad concept but I am struggling with the fact that charging ...
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