Questions tagged [multiplier]
Voltage multipliers - circuits that transform AC supply voltage into a whole number multiple of DC output voltage.
119
questions
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3answers
50 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 ...
1
vote
0answers
41 views
Hardware Multiplication ALU
I have multiplicand 5 , multiplier 7 which they are binary representation :
5 = 0101 , 7 = 0111 (4-bit)
Register A to save the data to be multiplied(Multiplicand).
Register B to save the multiplier ...
2
votes
3answers
112 views
Current sense resistor for high voltage
I have a 5KV DC output from a Cockcroft-Walton multiplier. The current is around few microamps as per the simulation. To prevent discharge, the 200Mohm resistor holds the voltage of the Cockcroft-...
2
votes
2answers
68 views
Cockcroft walton multiplier output both AC and DC?
I was watching this video
https://www.youtube.com/watch?v=ep3D_LC2UzU
and I noticed that closer to the end he is probing the upper half of the circuit and the scope is displaying square waves , also ...
1
vote
0answers
45 views
Cockcroft-Walton Multiplier strange voltage values
I am building a circuit that allows me to generate high DC voltages that can be used in conjunction with a 3He counter tube to detect slow neutron radiation. The circuit was designed by someone else ...
0
votes
2answers
61 views
Multiplying oscillator signal with a pulse
I am trying to multiply my oscillator sine signal with my pulse. But, the voltage of the oscillator is too big so it saturates.
This is the output I am getting from my oscillator. I am getting the ...
0
votes
2answers
31 views
Shift left followed by round for performing: y=x+cz in hardware
I wan't to implement a simple arithmetic, given the following (say 8 bits) integers x,y,z
$$y = x + c z$$
where 'c' is a fraction of a power of 2: 2^-1, 2^-2, 2^-3,...
I was adviced to perform the ...
2
votes
1answer
103 views
Flyback transformer vs neon sign transformer
I've been working on my spark gap Tesla coil, and I'm planing to use a 5kV 30mA neon sign transformer connected to a voltage multiplier circuit with 10 stages to get a higher voltage.
Could I use the ...
0
votes
0answers
89 views
Signed array multiplication
I am trying to implement 8x8 signed multiplication. I have already implemented the unsigned array multiplier using full adders and half adders. For this I am following a book named "Computer ...
0
votes
2answers
41 views
Calculation of max possible current load from voltage multiplier connected to PSU 12V rail [closed]
today I found in a box a PSU with two 12V rails each delivering 17A (Fortron SAGA II 400W) and decided to step-up the voltage so can feed the DPS5020-USB DC-DC converter (rated at 60V/20A max output). ...
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votes
1answer
110 views
How to implement a 48x48 multiplier using DSP48E slices in Verilog HDL?
Is it possible to create a 24x16 multiplier using DSP48E slice from a 25x18 dedicated multiplier in Virtex-7? Please post a sample code...
Are any advanced multipliers of these available?
1
vote
1answer
116 views
Voltage multiplier - selection of values
I'm designing a circuit, which includes a voltage multiplier. The schematics of voltage multiplier is well known, but it usually appears without any specific values for capacitors and diodes:
My ...
2
votes
2answers
165 views
I designed and made this circuit but it produces only 360V when it should be producing at least +1000V
The circuit consists of a 9V battery (the input source) connected to a 555 astable multivibrator operating at 1.34 kHz frequency connected to a transformer and a long voltage multiplier chain. ...
0
votes
1answer
142 views
What kind of hardware multiplier do modern processors use?
I was wondering what kind of multiplier implementations modern processors use. Is it some derived variant of booth Wallace tree algorithm? Are these kinds of micro-architectural details publicized ...
0
votes
1answer
72 views
PLL (Phase Locked Loop)
I find a bit of confusion on the web about the use of the PLL. Sometimes I read that, given a certain input signal, it is used to generate a signal whose frequency is N times that od the input one, ...
7
votes
4answers
2k views
How can I make 20-200 ohm variable resistor look like a 20-240 ohm resistor?
I have a fuel sender in my kit car that goes from 20R to earth (full) to 200R (empty). Unfortunately the gauge (constant current source, measuring resistance to earth?) expects empty to be 240 ohms, ...
0
votes
0answers
50 views
Voltage multipliers work worse with more stages?
I'm simulating voltage multipliers (Dickson topology) with the stages from 1 to 12, following the paper "Design Optimization and Implementation for RF Energy Harvesting Circuits, 2012". The load was ...
0
votes
3answers
163 views
Confused with voltage doubler circuit
This is how the book explains the process:
Let me consider the first 90Ā° of the input, the capacitor charges up to the peak voltage less the diode drop of D1, D1 is forward biased and D2 is reverse ...
1
vote
0answers
72 views
How to control charge on a high-voltage capacitor after voltage multiplier?
Can anyone think of an electronic way to control the charge on a high-voltage capacitor that is fed by a multi-stage voltage multiplier?
I can control the charge on the way up by controlling the ...
0
votes
1answer
88 views
Problem in blocking and non-blocking - verilog
I have this code and I am having a problem in the product output, any ideas? I've tried a lot and it doesn't work.
-1
votes
2answers
367 views
issue with booth multiplier VHDL code
I'm trying to build a 4-bit booth multiplier using VHDL. I don't know why but the process block is executed just once. The state does change from idle to busy then it doesn't work.
...
0
votes
1answer
82 views
Can you get values of the components in the circuit?
I have a mosquito repellent circuit diagram (voltage doubler) with printed values. Can anybody find the actual component value of the capacitors?
2
votes
1answer
790 views
Gilbert cell. Understanding the basic
I am trying to understand a concept of Gilbert cell.
I have the next figure.
Quastion1:
If +1V is set up in (3), then in (4) is admitted -1V, and for (5) is -1V, (5) +1V.
The current source is sume ...
0
votes
1answer
53 views
C-W Multiplier Unipolar Input
I was seeing some circuits for a Cockroft-Walton multiplier.Most of them seem to be using an AC input voltage.My specific query is ,would this multiplier work with a uni-polar (pulsed DC) input. For ...
3
votes
1answer
2k views
4-bit binary multiplier circuit
I have made this 4-bit binary multiplier circuit, but the product of, for example: B3B2B1B0 (1100) x A3A2A1A0 (0001) = P7P6P5P4P3P2P1P0 (00101000) and not 1100,
What have I done wrong?
0
votes
1answer
208 views
How is the signal Multiplied with the Carrier in AM
In wireless transmission, via Amplitude modulation, we multiply the message signal by a carrier wave to get the modulated signal
$$x(t) = m(t) \times cos(\omega t)$$
Where \$m(t)\$ is the original ...
2
votes
1answer
613 views
Resistance Multiplier
The circuit below is a resistance multiplier but I am having trouble deriving the effective input resistance, which should be a multiple of \$R_b\$.
The answer should be something like $$R_{\text{in}}...
1
vote
1answer
319 views
Bug zapper project with counter
I have this evil thought that building a fly zapper with a counter every time it works.
There are two ways in my mind, first one is hacking a bug zapper product which I already have (hand grip style, ...
10
votes
4answers
565 views
Analog analog multiplication, part of a hybrid CPU (for fun)
Short version: How do I make an analog multiplier that takes two analog DC inputs?
Long version:
I made a comment recommending Ben Eaters videos for another question, while doing so I ended up ...
1
vote
1answer
66 views
Help with frequency multiplying
I'm generating a 15MHz sinusoidal signal from a Colpitt oscillator that i want to multiply to 90MHz. I'm thinking about doing a triple multiplier and a double multiplier to get the right frequency. ...
0
votes
2answers
107 views
does frequency multiplier work with signal that contain multiple frequency components?
for example, say we have a wide band frequency multiplier that takes the input of 100MHz-200MHz and the output have frequency of 300MHz-600MHzļ¼a frequency tripler).
if the signal contains a 110MHz ...
2
votes
2answers
658 views
VHDL 4-bit Shift-and-Add Multiplier Buffer and Out port error
I am working on a creating a 4-bit Shift-and-Add Multiplier. I am getting this warning message -
"WARNING:HDLParsers:3555 - "//filer1.egr.msu.edu/samarar1/ece230/Project05/Project05.vhd" Line 220. ...
1
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2answers
2k views
Mosfet based ripple filter for tube amp
I need some hint to fully understand how this circuit works (credits to Audio Design Guide):
simulate this circuit – Schematic created using CircuitLab
My doubts are in the operation of the ...
2
votes
3answers
340 views
Are there any drawbacks to this oscillator frequency multiplier circuit?
I'm trying to make an upconverter from 65 MHz to UHF band using a mixer; I therefore need an oscillator frequency around 375 MHz to mix with the 65 MHz base signal. I'm also trying to vary the ...
-1
votes
1answer
406 views
How to create discrete high voltage oscillator?
I need to increase 24 V DC to 1.5 kV DC. Using a voltage multiplier would require over 60 stages.
I am considering using a few stages of a voltage multiplier, say 8, to increase the voltage to about ...
1
vote
1answer
109 views
Power IR2110 from a low voltage AC Source
I am trying to power the IR2110 using an AC Source. However, this source is also connected to a full wave bridge rectifier that's going to supply a controlled buck converter.
I tried using a voltage ...
1
vote
2answers
75 views
In a voltage multiplier, must the frequency be low enough to allow for charging in first stage before switching?
For example, in a four stage multiplier, taking 150 V to 300 V, 450 V, and 600 V...
Is it common to charge the first stage capacitor to maybe 50 V (given a high switching frequency) and propagating ...
-3
votes
2answers
90 views
Do we have binary dividers cicuit on cisc computer? [duplicate]
Just like we have binary multipler circuit in cisc computer so do we have binary divider circuit in cisc computer? Or it is just like we use algothrims instead of having a real divider circuit? (Just ...
-6
votes
2answers
312 views
Do we have binary dividers circuit in CISC computers? [closed]
Just like we have binary multipler circuit in cisc computer so do we have binary divider circuit in cisc computer? Or it is just like we use subtractor multiple time instead of having a real divider ...
-1
votes
2answers
159 views
Voltage multiplier
please be patient as I am not a electrician/electronic engineer. I am wanting to make a negative ion generator to attempt to make a powder coating gun, I know they are cheap but I like to build for ...
3
votes
1answer
356 views
Order capacitors by leakage rate in Cockcroft-Walton voltage multiplier
Looking at a system like the Cockcroft-Walton multiplier posted here: https://www.allaboutcircuits.com/textbook/semiconductors/chpt-3/voltage-multipliers/
To use 400V 100uF electrolytic capacitors ...
0
votes
1answer
57 views
How to derive this formula from this schematic?
This is the voltage multiplier from the paper ,it said the rectiļ¬ed output voltage is given by
\$ V_{out_i}\$= \$ V_{out_{i-1}}\$ +\$2(V_A-V_{ON})\$,\$V_A\$ is the AC voltage amplitude at the input;\$...
3
votes
1answer
904 views
Voltage Multiplier Frequency and Waveform
Note: I am aware of this question. It is 6 years old and I didn't find an answer there and I didn't want to necro the question.
As part of a school physics project I need a very large voltage.
I will ...
0
votes
1answer
80 views
Does a RF frequency multiplier work with ultrashort pulse?
The question is, does a RF frequency multiplier work with ultrashort pulses?
In another words, does the frequency multiplier change the pulse width of input signal?
For example, suppose we have a ...
2
votes
1answer
3k views
analog multiplier using log and antilog amplifier issue
I'm trying to build an analog multiplier that takes any two voltages and produces the product for them
This is the basic layout of the circuit:
can this layout do what I need?
I know there is ...
1
vote
1answer
97 views
Combinational Linear Shifting VHDL
I am designing a 32 bit floating point pipelined and synthesizable adder/multiplier as part of group for a class in school. I was put in charge of the re-normalization. Part of this is left or right ...
0
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1answer
168 views
switched capacitor voltage doubler for strobe circuit
I am interested in making an LED blink fast with a low duty cycle. To make the LED bright again (despite the low duty cycle), I thought I'd try to use some sort of charge pump to overdrive the LED. I'...
1
vote
0answers
135 views
Conceptual confusion about voltage multiplier circuits
I can do circuit analysis of the half-wave series multiplier (also called Villard or Greinacher cascade or Cockcroft-Walton multiplier) and see that it works, but I have several conceptual confusions ...
1
vote
2answers
537 views
Why do we do right shifting in Booths algorithm?
I know the working of booths algorithm.
Suppose we have multiplicand M = 01011
and multiplier Q = 01110
We can write Q as (2^4 - 2^1).
So multiplication reduces to 2^4(M) + 2(-M)
Now booths ...
1
vote
2answers
956 views
How can I multiply square wave circuits?
I would like to generate a signal that consists of a 1 kHz signal, which switches to a 100 kHz signal, flipping from one to the other at a rate of 10-100 Hz. I have access to signal generators to ...
