Questions tagged [multiplier]

Voltage multipliers - circuits that transform AC supply voltage into a whole number multiple of DC output voltage.

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3x analog signal multiplier

I was looking for sin(x) in, sin(3x) out. I am aware of PLL, diode, and AD632 multipliers. Most are either squarers for sin(2x) or pure sine or amplitude multipliers. I saw the sin(a+b) identity and ...
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Is the Dadda multiplier faster than the Wallace adder?

If I understand it correctly, the Dadda multiplier adds the partial products in a similar way compared to the Wallace multiplier, but it doesn't reduce the partial product terms as much in its tree ...
Minecraft dirt block's user avatar
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Why is this extra bit width necessary in a multiplier?

In a discussion on multiplier circuits, my textbook (Brown and Vranesic's Fundamentals of Digital Logic, 3e) write that When a shifted version of the multiplicand is added to a partial product, ...
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Multiple leads to one channel of labscope

What would be the best thing to use to block the ground signal of a fuel injector while monitoring all 4 signals at one time attached to one channel of my labscope.The main use would be on the ground ...
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What am I doing wrong with this 2x2 Karatsuba Multiplier in Verilog HDL?

I am trying to implement a 2x2 karatsuba Multiplier which I will be using as a base case for a higher bit multiplier. Here's the code: ...
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Why is my Karatsuba multiplier not giving right answers for large numbers?

I tried to implement 16-Bit Karasutba Multiplier in Verilog HDL. It gives me right answers for small numbers, but it's incorrect for large numbers. Can someone point out what's wrong? Here's the ...
Killjoy's user avatar
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Do voltage multiplier circuits and transformerless power supplies have functional similarity? [closed]

I saw diagrams of voltage multipliers like in the picture below. To my understanding, it seems like they have the same function as transformerless but the use of a voltage multiplier is to increase ...
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Voltage multiplier operating principle with pulsating DC

I need to generate up to 2 kV by pulsing a DC 1kV source. The circuit I used is the following: Clearly, this circuit is intended for an AC input that has both positive and negative halves where as in ...
ShiroGeek's user avatar
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Multiplier using op-amps not simulating properly in LTspice

I'm trying to create a square of two signals (3 and 4 V) using multipliers logic with only opamps in LTpsice, but the Vout is incredibly high (about -400 kV for 3 V) and not accurate. Any idea why ...
Kevin J Jijo's user avatar
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How do I simulate an analog multiplier in LTspice? [closed]

I need to perform the squaring of two input voltages and I'm not sure how to go about that without a multiplier.
Kevin J Jijo's user avatar
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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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High voltage multiplier attempt - low voltage output

I have built a 15 stage voltage multiplier in hopes of multiplying an input voltage of 2kV to ~70kV. This voltage multiplier has been constructed with 3kV 1nF ceramic capacitors and diodes rated at ...
import_hill's user avatar
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Analog Circuit Modelling in Simscape (Simulink) doesn't work (No Input sighted)

I tried rebuilding the analog circuit for the Lorenz Attractor in Simulink using Simscape toolbox. Luckily they have also an analog multiplier circuit built-in and I re-wired everything just as the ...
johnny_1010's user avatar
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VHDL: Booth's multiplication algorithm process block not working as intended?

I am trying to implement Booth's multiplication algorithm using this flowchart in VHDL. So far, I have written the code below: ...
First User's user avatar
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Are there any "Both Rising Edge and Falling Edge Triggered" Shift Register?

I was designing this circuit in Logisim-evolution. In the book, it is mentioned that an n-bit multiplier would require n-clock cycles to work. I think this will be possible only when we have the shift ...
Vedanta Mohapatra's user avatar
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Does diode reverse recovery time in Cockcroft-Walton Multiplier depend on current or negative voltage?

Say there is a multiplier whose sine wave input is 1 kV, 50 kHz, output should be 10 kV, 100uA. The high frequency means a fast diode should be used (low reverse recovery time trr). However, it seems ...
Hyp's user avatar
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Trying to implement a squaring circuit [duplicate]

Using the results from a previous question i want to implement a squaring circuit. This circuit was posted by some other user in the answers. Below is an image of the squaring circuit used. I have to ...
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Can this ZVS driver power a Cockcroft Walton Multiplier?

I'm having trouble figuring out how to connect my ZVS driver (30-50khz) to this Cockcroft Walton multiplier (CWM.) I'm starting to wonder if it can even work with this circuit. Its maximum arc gap is ...
HelloCthulhu's user avatar
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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 ...
Luke Galea's user avatar
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2 answers
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Cost effective way to generate THz frequency

Kicking around some ideas here as how to multiply a relatively low RF GHz frequency to the THz range. Would simply using a cheap 4400MHz RF signal generator and a couple inline RF frequency ...
Robert 292's user avatar
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How to determine resistors for rectifier bridge wattmeter - Hewlett patent 3662264

More than 40 years ago I worked for a company that sold, modified, and serviced a wide range of electronic instruments, including wattmeters. In particular, we built watt transducers that used a core ...
PStechPaul's user avatar
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How do I achieve well-formed pulses in a Dickson charge pump?

A picture is worth a thousand words, and I tend to make a lot of mistakes in my words, so, first picture, the circuit in question: I know the Dickson charge pump looks a little different but it is ...
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Impedance calculation of a four stage Dickson voltage multiplier

I built a four stage Dickson voltage multiplier for RF energy harvesting at 2.45 GHz. This is the circuit which I built. My components are BAT54S as diode and 100uF capacitor. I need to calculate the ...
Bowman's user avatar
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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 ...
JeanMi's user avatar
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Signal multiplier circuit using op amp concepts

Design a circuit that from two sinusoidal inputs generates the output \$s(t) = \sin(2π f_1 t) \times \sin(2π f_2 t)\$, where \$f_1\$ and \$f_2\$ are two distinct frequencies between 1 kHz and 10 kHz. ...
Panopticron's user avatar
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BJT type Gilbert cell does not work

I designed a Gilbert cell for analog multiplication, all the transistors (NPN) are in active region as I checked one by one, however, the result does not seem correct at all. How can I make it better? ...
OnurTR's user avatar
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Trouble with VCA as signal amplitude control

I designed (and tested) the classic analog multiplier composed with operational amplifiers. However, the voltage resulting from the operation did not correspond to the product of the input voltages. ...
Borg Drone's user avatar
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Op-Amp Based Multiplier LTSpice Simulation

I'm supposed to make a multiplier with log amplifier configuration using LM741 op-amps and 1N4001 diodes. I found this circuit configuration in this Youtube video. However, the output voltages I get ...
Boffin's user avatar
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Concept of Booth Encoded Multiplier 8bit

So I'm kinda a newbie in this world so pardon me for the basic questions. I want to implement Booth encoded multiplier 8bit. Until now, I pretty much understand for the block diagram and what happened ...
noc's user avatar
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Need help understanding voltage multiplier in boost SMPS

I made a 4x multiplier on the switch node of a boost circuit. I don't quite understand how DC pulses behave in a voltage multiplier. C1, C2, C4, and C10 don't seem to contribute to series discharge. ...
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Can this converter chip be used for 25W power conversion? [closed]

For this LTC1043 chip: Which does this: Can we deliver 1 amp of 25 volts +/- 6v (or something close to it) by dividing US-110V line voltage by 4? And why is this chip so expensive ($5.33 in 1k qty) ...
MicroservicesOnDDD's user avatar
3 votes
1 answer
695 views

How is the frequency multiplied by four here?

Here is the original circuit found from YouTube link. Since I don't have all the parts, I modified the circuit diagram: I have edited this circuit diagram. When I add the Zener the sound improved. ...
Avon97's user avatar
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Multi Factor in electric meter

We have an engineering workshop. In the initial stage our connected load was 60 kW. 2 years back we have removed 50% of machineries and now the load is only 30 kW. In our electric meter manufacture ...
Sanddep's user avatar
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Passive voltage multiplier output power

I have this voltage multiplier sextupler (Vin = 1 V, f = 4 Hz, l = 30 µH.) I would like to know the output power when the capacitor is charged to 1.5 V.
cheniour oussama's user avatar
1 vote
1 answer
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Radix-4 Booth's Multiplier verilog code error

I wrote the code for radix 4 booth's multiplier. But, I am getting 2 errors. I am not able to solve it. Could you please help? The errors are: Error: C:/modelsim_dlx64_2021.1/examples/assignment/...
satoru's user avatar
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wrong output of a multiplier in IP catalogue

I used a multiplier from IP catalogue in VIVADO. ...
LenaPark's user avatar
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1 answer
227 views

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 ...
Xinus's user avatar
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Multiplier in FPGA

I have implemented multiplier by using IP catalog and added in simualtion as ...
Jang Lee's user avatar
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2 answers
680 views

Proving the formula for capacitance multiplier

I'm looking into the mathematical justification of how a capacitance multiplier works. Here is the circuit. I have to prove that resulted grounded (multiplied) capacitance is (R2 * C)/R1 here by means ...
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Calculating the capacitance for a voltage multiplier circuit

Recently, I've been asked to create a voltage multiplier, with an output voltage \$Vo = 5*Vi\$, where \$Vi\$ is the peak input voltage. This was accomplished without much issues through the schematic ...
Pedro Martins de Souza's user avatar
1 vote
1 answer
292 views

Why does two-BJT transistor-based capacitance multiplier show bad performance

I'm trying to understand why two-BJT transistor-based capacitance multiplier shows bad performance. The circuit (note that capacitance multipliers are bi-polar): Below are time output for usual RC ...
bimjhi's user avatar
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2 answers
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Voltage multiplier circuit not working

I am trying to make a voltage multiplier circuit. When I connect it to mains \$120 \; V\$, the output voltage becomes \$90 \;V \;DC\$, I do not know why this is. Capacitors: \$20 kV \; 1000 \; pF\$ ...
matthew stormant's user avatar
2 votes
1 answer
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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, \$...
KD9PDP's user avatar
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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 ~...
dtk's user avatar
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1 answer
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Analog multiplier using log and antilog amplifier

What should I add here to make it work? The output should be 3 * 5 = 15V.
Abdelrhman Ahmed's user avatar
2 votes
2 answers
199 views

Impedance of a Dickson Multiplier

Can someone help me in regards to calculating the impedance of a Dickson multiplier? It consists of capacitors of 3.3 pF and 2850 shottky diodes. They can be assumed ideal. It consists of 7 stages, ...
Simon Gerber's user avatar
3 votes
2 answers
298 views

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 ...
Mike Spivey's user avatar
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1 answer
395 views

1-10Hz frequency count translated to PWM for stepper motor RPM

I would like to control the speed of a stepper motor based on an input signal that consists of short 12V pulses at a varying frequency of 1-10Hz. I know this is an easy task with a microcontroller but ...
Max Maruszewski's user avatar
3 votes
4 answers
469 views

Why does my diode log amplifier in LTspice not match theory?

I am trying to learn about analog multipliers, and I'm trying to implement one using a log-antilog design. I am currently having some difficulties with the log part because simulating an ideal ...
Paolo Celati's user avatar
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3 answers
225 views

Cockcroft voltage multiplier - Stages not building up voltage

We are trying to develop a Cockcroft voltage multiplier that is getting input from IC555 astable driver circuit. The circuit diagram for driver and multiplier is as shown below. The final objective ...
user258410's user avatar