Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [voltage-doubler]

For questions about circuits which produce an output voltage that is double the input voltage, usually using a combination of capacitors, diodes, and/or transistors.

For questions about circuits which produce an output voltage that is double the input voltage, usually using a combination of capacitors, diodes, and/or transistors. See Wikipedia's voltage doubler article for more information.

64 questions
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Unexpected results from voltage mulitplier

I needed a high voltage (500VDC) source in order to test a circuit. To achieve this, my mentor instructed me to build a voltage doubler, which I would power with 250VAC. I chose to use a simple half-wave rectifier as shown below. The diodes are…
user160044
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How does the MAX232 double the voltage?

MAX232 Datasheet Hi, I am currently a student so bear with me please! I'm currently using a powering the MAX232 with 5V DC, and when I measure from VCC to lets say, pin 3, I am getting a voltage reading of around 13V on my voltmeter. Using a power…
Phibz
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Voltage doubler

I'm a little lost as to what is going on in this circuit. The book I am reading mentions that the load would see double the voltage of the input voltage. How does this work?
ergodicsum
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Having trouble understanding textbook explanation of "hot chassis" in full-wave voltage doubler vs half-wave

The textbook explanation is not doing it for me. The half-wave voltage doubler shown in Fig. 4-27(a) offers some improvement in safety over the full-wave voltage doubler. Compare Figs. 4-24(a) and 4-27(a). The chassis is always hot in the…
Al T
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TC962 Voltage Doubler - Why the slightly lower output?

I am prototyping this voltage doubler circuit based off the datasheet of the TC962. Capacitors are GRM21BZ71E106KE15L. When applying 9V at the input, the output is 17.96V at no load. When drawing around 67mA using a 215Ohm resistor across the…
Luke Galea
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Voltage doubler or not?

I got a quick question! Is the circuit depicted in the link indeed a voltage doubler or is it just a bridge rectifier with smoothing capacitors?
user113478
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RC low pass filter not working as expected

I have designed a high voltage power supply and I'm trying to filter out the switching noise. I'm using a transformer that is driving a basic Cockroft-Walton voltage multiplier to a 1200V DC signal. At the end of the voltage multiplier I have a 2nd…
bricechart
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How does the Villard circuit double voltage?

How does the Villard circuit double voltage? I don't understand the capacitor role when the voltage sinewave goes negative.
Ariyan
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Why need voltage doubler when transformer can be made for full voltage

I have seen old vintage tube power supply (for example Heath HP-23A), that transformer secondary is roughly 300v RMS and a voltage doubler is used at output to obtain 750+ V DC for vacuum tube anode. My question is, why use a voltage doubler instead…
Ashok Das
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What is the relation between NE555 voltage doubler output voltage vs load?

Considering this circuit (NE555 voltage doubler), how can I find the formula for the relation between the value of the load resistor and the output voltage? You can see below two examples of this circuit, one with 1k ohm load resistor with 8.617V…
JeanMi
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Is it possible to construct a voltage doubler that both powers an opamp and is driven by it?

I have an application in which I need to drive a MOSFET in saturation to create a constant current load. I'm using an opamp in a fairly straightforward feedback circuit for this, but the current the MOSFET can conduct is limited, since my opamp is…
Nick Johnson
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Voltage doubler for LED backlight

I'm sketching out a design for an easily and cheaply built handheld computer based on an ARM microcontroller, and thinking of using a small LCD display. The display has an LED backlight rated for up to 80mA with a typical \$V_f\$ of 3.2V, though a…
Mike Spivey
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Voltage multiplier with changed capacitor value ratio

I want to ask about a voltage multipler. I understood the voltage doubler. By setting the capacitor values ​​of the two capacitors to the same value and setting the voltage doubler circuit, we can obtain a voltage twice as high as the existing…
종민이
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Can a lower voltage overheat a magnetron?

Background I am working on a microwave oven that starts to emit an odor after 2 minutes of full heating despite otherwise working correctly. The smell is the same as that "sweet", overheated coil varnish smell that anyone with much electronics…
kackle123
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What are the differences between Greinacher and Bridge voltage doublers?

I was reading a wiki article on Voltage doublers, and wondered - what are principal diffirences between two following schemes: They all share same amount of components, but when and why should be one variant chosen over another?
user197437
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