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.
69 questions
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Charge pump understanding question regarding PWM duty cycle and PWM voltage level
I am playing around with charge pumps / voltage doublers for the first time and have some questions that I can't find anything online to.
First, I have a standard charge pump, in an ideal world the ...
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Voltage doubler waveforms
A voltage doubler is connected like this (the voltage source in series with the inductor simulates transformer output):
After stepping the load (100k, 1M, 10M, 100M, 1000M) the waveforms look like ...
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Why don't the C1 and C2 capacitors discharge? [closed]
In the circuit, we know that when D1 is connected then the C1 capacitor is also in the circuit until it's fully charged. Why when D1 is disconnected and D2 and C2 are in the circuit, C1 can't ...
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Voltage Doubler capacitance calculation
I have an astable multivibrator that produces 5 V square wave input to the push pull and the voltage doubler part of the circuit. Now somehow the simulation works at 0.1 uF capacitors for the voltage ...
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Voltage not varying with duty cycle
I want to make a circuit that changes voltages with the duty cycle as well as doubles that for me. I therefore made a voltage doubler circuit along with alternating PWM wave. But as I changed the duty ...
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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. ...
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Voltage doubler circuit working
I understand that when the voltage at the anode of the first diode is greater than the cathode it turns on, however immediately after the first two positive cycles, how does the diode turn on?
It ...
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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-...
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How to select caps for voltage doubler at RF frequency for DC current output?
High-frequency AC transformer output hooked to half-wave DC voltage doubler. Current through is 6 A to LOW frequency switching load.
I assumed there was enough 20 kHz time to keep the second cap ...
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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 ...
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Circuit design options for 58V lithium battery charger
I have an Echo 58 volt chainsaw and the battery charger has malfunctioned so that it no longer charges the battery pack. I have been charging it by using a 2A current limited lab power supply set to ...
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Boost Converters v Voltage Doublers
Can you explain the basic reason why boost converters seem to be more popular than voltage doubler circuits for load bearing output?
I have built these two circuits in the simulator and they both ...
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+/- 12v supply for AD8421
I need +/- 12 Vdc power supply for AD8421 from 5 Vdc. Can I use LT3582 (with output +/-12 Vdc; 85 mA) to supply the AD8421?
Thanks.
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Voltage doubler current halving
I'm trying to understand how a voltage doubler using a switched capacitor circuit affects the charge being distributed from the input to the output.
simulate this circuit – Schematic created ...
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Help with voltage doubler in a WPT application
I need some help with this schematic to have higher voltage at Vrect. This is for charging a receiver at 25 mm in a WPT application. I was expecting a voltage of 2Vin at the output of the voltage ...
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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 ...
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How should I understand this 1.5 V to 90 V voltage step-up network?
I am learning about Jim Williams's avalanche pulse generator.
It is in page 93 of AN47 - High Speed Amplifier Techniques.
I don't understand the circuit's voltage step up network, which is 1.5 V to ...
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How to double the DC voltage during start-up
Is there any simple way to double the DC voltage during the first 10-50 ms? For example - I need 6V at startup and then go back to 3V that is set on power supply.
My current solution is Attiny85 and ...
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Can I use negative voltage generator TC7660 as voltage doubler to drive LED of MAXIM30101 oximeter IC?
I am trying to use two AAA battery to generate two power supplies,
1.8V(via regulator AM1117)
5-6V to drive LED (using voltage doubler TC7660).
Both these voltage is requirement of Oximeter sensor ...
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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.
...
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How to analytically find node voltages in a voltage doubler?
Given a voltage doubler circuit:
simulate this circuit – Schematic created using CircuitLab
You can figure out what should happen in stead state if \$R_L=\infty\$ and \$R_s=0\$. In that case, \$...
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High voltage Dickson charge pump switching
I am working on a circuit based on the LT1930 (DC634A) to boost input voltage between 30 and 90V.
I would like to take this boosted voltage and double it via a Dickson charge pump to the required ~...
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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 ...
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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 ...
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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", ...
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Voltage multiplier does not work
I have a built a simple voltage doubler. the circuit is as below:
simulate this circuit – Schematic created using CircuitLab
This represents only one stage, and my circuit has 4 stages. The ...
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Voltage doubler operation
I searched the voltage doubler circuit and I understoond how it should operate but I don't understand something.
simulate this circuit – Schematic created using CircuitLab
This is a voltage ...
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Thin film capacitor for voltage multiplier
I am designing a voltage multiplier with 5 to 10 stages. I have this circuit where I run a transformer at 450KHz and feed the output to the voltage multiplier. Is it a good idea to use thin film ...
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Is my thinking of half wave voltage Tripler Circuit right?
Is my thinking of half wave voltage Tripler Circuit right?because my thinking is a little bit different from the book's
Book
Let the input is a sine wave with amplitude \$=V_m\$
1.When input is the ...
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Having trouble in understanding voltage doubler
I can get final output voltage \$V_{\text{on}} = 2V_p\$ when this circuit is assumed initial voltages of \$C_1\$ and \$C_2\$ is zero. and \$C_1 = C_2\$, and using the ideal diode model.
But when I ...
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How to boost a Power Bank's maximum output voltage? [closed]
I have an Anker ~27Ah Power Bank which has 3 × (5v , 3A) power output.
Is it possible to connect the outputs in series and get 10v or 15v output with a current flow of 3A?
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Decreasing output of a voltage doubler
I'm trying to build the following circuit. The advice on the site I got it from said to try using 1n4001's instead of 1n5817's, because that would get the voltage down to around 15V, which is what I ...
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How do we explain the voltage doubler operation by analogy?
The idea behind the Greinacher voltage doubler is so clear and intuitive that it can be explained, like any brilliant circuit idea, in a very simple way. I did it yesterday in a similar question where ...
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How does the voltage doubler work at the startup?
I have no particular interest in power electronics but I am always impressed by such clever circuit solutions as the Greinacher voltage doubler. The idea behind it is so clear and intuitive that it ...
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Half-wave voltage doubler question
I've been having trouble trying to understand the circuit mentioned in the title, which you can see in the picture below.
Note that I'll be using the ideal diode model in my explanations. In case ...
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Voltage Multiplier: step by step explanation
I do not understand how this voltage multiplier circuit works:
wherever I have read (also Wikipedia), I have not found a step by step explanation. I do not understand if the voltage drop across the ...
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How to 3x or 4x a DC voltage while minimizing board space with no microcontroller?
I have a 3.7V DC voltage source that I'd like to boost to at least 10 Volts.
I've been using Microchip's TC7660 component as a voltage doubler. But it only comes in SOIC (rather large for SMT). And ...
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Measure impedance of rectifier using harmonic balance in ADS software
I am trying to use harmonic balance to find the impedance of the voltage double rectifier. After finding the impedance, I will use the impedance matching tool to find out the L matching.
As the ...
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Discrepancy between simulation and measurement for a voltage doubler/ rectifier design at 5.8 GHz
I am designing a pretty straight-forward voltage doubler at 5.8 GHz with MACOM's MA4E1317 diode, which I have used before and know from previous experience that matches pretty well with the spice ...
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Does the capacitance values matter in a full wave voltage doubler?
I've simulated the following schematic on Cadence, and another less professional simulator called 'everycircuit'.
I initially had a C1 = C2 = 10uF which simulated correctly on both simulators. Then I ...
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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-...
user160044
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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 ...
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Is it possible for a voltage multiplier to be used to provide both positive and negative voltage?
What I was wondering is it is possible to use a single voltage multiplier to provide a negative and positive voltage. Referring to this voltage doubler circuit, if you connect a capacitor to the top ...
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power efficiency's definition
Power Efficiency is defined as output power/input power, right?
And there are a little bit different definition of power efficiency ...output power/(output power+power loss).
Is these mean same ...
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High Voltage Double
I'm using a microwave oven transformer for some high voltage projects including testing it out with some voltage doubles. I ran into a rather curious problem I dont seem to understand and I'm just ...
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Is it ok to use an AC leg as ground?
I'm powering (hoping to power?) two boards from one 12V AC source. One is a preamp requiring 12V AC in (easy so far) and the other is a scavenged audio board requiring +12/-15V DC.
I'm using the ...
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Why can't I simulate this circuit?
I'm trying to simulate a basic voltage-doubling rectifier circuit:
But my time graph looks like this:
Is there something wrong with my circuit? Am I using the simulator wrong?
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What is the difference between half wave voltage doubler and full wave voltage doubler?
What is the difference between half wave voltage doubler and full wave voltage doubler?
(Using Practical Diode with forward bias voltage Vd)
To be specific:
i)Do the two differ in their principle of ...
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Why does the voltage double in a doubler-circuit?
I’m having a hard time understanding how the final voltage is achieved.
I understand that in the first half of the sine wave the first capacitor gets charged to 1V.
In the 2nd half the first one is ...
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Capacitors for Jacobs ladder?
Can I use 104 k 250v ceramic capacitors in a Jacobs ladder circuit? Do I need to use higher rated ones? I'm salvaging some of my components from a used CFL.
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