Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [multiplier]

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

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What are some ways to improve a voltage multiplier?

I am working on a Nixie power supply, but I would like to improve it. I have 4x9V batteries in series for a total of 36V to be switched across a multiplier. A (TTL) 555 timer is running astable from only the first 9V battery to generate a 8.5-ish…
Yankee
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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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Voltage multiplier calculations

I want to make a voltage multiplier to gain a high voltage, I understand that you must input AC for it to work and you get DC out. I also understand that the multiplier is made up of capacitors and diodes. What I don't understand is how you…
Jack Trowbridge
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dual of voltage doubler

Voltage doublers, like those close to be one stage of Cockroft-walton multipliers, are well known. They allow to double the voltage of an AC input and can be useful at the output of a transformer for instance. Of course, the price is that the output…
MikeTeX
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Designing a simple ALU

I need to design an ALU with two 8-bit inputs A and B and control inputs x, y, and z that supports the following operations: x y z | operation 0 0 0 | S = A-B 0 0 1 | S = A+B 0 1 0 | S = A*8 0 1 1 | S = A/8 1 0 0 | S = A NAND…
norman
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Parallel multiplication hardware

This picture is taken from Computer Organization and Design, Fourth Edition, David A. Patterson, John L. Hennessy. Sorry for the low resolution. I cannot get my head around it. I can see why the bits to the right become lsb's in the product…
Panayiotis Karabassis
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3-bit multipliers - how do they work?

I need to understand how 3-bit multipliers work and then I must design one. I've read through Wikipedia's binary multiplier but I just can't wrap my head around it. I don't understand where to start. Could you please explain to me what happens when…
user3195417
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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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Two's Complement Multiplication Overflow

I was reading through a textbook of mine and found a question that I really can't figure out. It asks to find a pair of two's complement numbers which will result in an overflow if they're multiplied together using a 4x4 array multiplier, and I'm…
Matt
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Creating a verilog code for 4-bit multiplier using lookup table

I am having trouble creating a verilog code for a 4-bit multipler using a lookup table. I am still trying to grasp the concept of a lookup table. If anyone could help me it would be greatly appreciated.I am just lost.
supasport13
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2-bit adder and Multiplier

I am trying to wire a 2 bit adder and a Multiplier on my breadboard. I have the 2 bit adder somewhat done, but dont know where to start on the multiplier. I need help reading circuits and translating them to the breadboard. My main issue is figuring…
Ryan Cooley
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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 circuit comprised of just resistors, rectifiers,…
PStechPaul
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LUT vs. hard IP based multipliers on Spartan-3 FPGA for constant coefficient multiplication

Before I get to my question, here are the specs for the board and synthesis tool I am using: Family: Spartan3 Device: XC3S200 Speed: -5 Synthesis Tool: XST My 4-bit multiplier is in my design's critical path. I would like to reduce the time…
Matthew Mellott
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large digital multiplier IC

I was in college 18 years ago and saw a classmate's project that had a very large DIP IC on it (roughly 1"x4" !) which he said was a digital multiplier IC. (I assume it was 32x32 -> 64) I'm curious what part that might have been and was wondering if…
Jason S
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