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2
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1answer
61 views

Implimentation of BZFAD using VHDL

I'm novice to vhdl coding. I'm implementing BZFAD which is a low power multiplier. In the Block diagram as shown below I have a transistor block(M1) whose input are driven from the ring counter. I'm ...
0
votes
0answers
16 views

Synthesis of Verilog code in Cadence

I am trying to synthesize my Verilog code, which I wrote using Modelsim tool for 8-bit MAC in Cadence Encounter. The file that is generated after synthesis has to be re-checked for functionality in ...
0
votes
0answers
22 views

Multiple motor shield connection?

I'm working with a 4-motor Arduino shield, and it looks like they can't be connected together since they are not Adafruit. I need to know if it's possible to define the pin breakdown for each shield ...
2
votes
1answer
73 views

Synchronizing multiplier with adder to form mac

I have designed an 8-bit multiplier in Verilog which takes a maximum of 8 clock cycles to give the product. I have also coded a 16 bit adder based on combinational logic. I now want to integrate the ...
0
votes
1answer
75 views

Analog multiplier using logarithmic and anti-logarithmic opamp issue

I'm trying to build a analog multiplier that takes in two voltages and produces the product of them. I have tried to simulate a circuit with finds the log of two voltages, sum them and then find the ...
0
votes
0answers
41 views

3 bit x 3 bit multiplier. How to add the 3 partial products? [duplicate]

I want to implement a circuit for a 3 bit x 3 bit multiplier and i am confused as of how im supposed to add the 3 partial products. I know it should be like that : ...
1
vote
1answer
62 views

Bit compression in Verilog

I am trying to write a Verilog code for a multiplier based on the abacus principle. I want to compress an array of 8X15 bits to the lowest rows. For e.g. for an array of ...
0
votes
1answer
68 views

Analog Multiplier with MOSFET - Implementation not working

simulate this circuit – Schematic created using CircuitLab I am using the above circuit to multiply BAT1 and V2, the circuit analysis tells me the output voltage Vm1 should be ...
6
votes
3answers
495 views

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. ...
0
votes
2answers
60 views

Digital-to-analog conversion of a product of digital inputs

If we have a 4-bit DAC, which converts a 4-bit binary signal \$ X = X_3 X_2 X_1 X_0\$ to an analog signal \$Y=X/2\$ (i.e. 1010 -> = 5 V, or 0111 -> 3.5 V). How can we create a DAC, using any number ...
0
votes
1answer
54 views

How to clear a 4 bit shift register with no clear input?

I have 4 bit pipo shift register 74ls95 . It does not have an clear input. Is there any way to clear the register without giving all the parallel inputs as zero. I am using it as an component of shift ...
-1
votes
1answer
90 views

Is it possible to buy high pass filters that work in the 100 kHz range?

I want a device that rejects 100 kHz but lets through 150 kHz. I tried building a simple passive first order circuit but the roll-off wasn't sharp enough. Most standard electronics vendors don't seem ...
1
vote
1answer
82 views

Complexity comparison of an adder and a multiplier

I have two algorithms with different requirements of addition and multiplication operations as follows: Algorithm 1: 100 additions 200 multiplications, total = 300 operations. Algorithm 2: 300 ...
1
vote
1answer
153 views

Why AD834+AD811 voltage controlled amplifier does not accept around ground signals?

I have setup a circuit according to page 15 of AD811 Op-Amp datasheet . The design receives 0.5-1.2 vpp sine wave between 1Hz-50MHz from AD9850 DDS and it also has around +0.7 to +1 v offset voltage. ...
0
votes
1answer
94 views

Question about AD834 + AD811 as voltage controlled amplifier

According to page 15 of AD811 datasheet , it can be used as a voltage controlled amplifier in conjunction with AD834 . In the schematic below, I am a bit confused about the configuration. If we ...
2
votes
1answer
147 views

Help design multiplication / modulation stage

I'm a self-taught amateur analog electronics enthusiast, I wonder if I can get some basic help on a simple circuit to demonstrate an interesting mathematical concept. (Not a homework assignment, but a ...
2
votes
1answer
841 views

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 ...
0
votes
1answer
201 views

Multiply 4 Digit Binary Number By 3 - Circuit

I want to find a way to multiply a 4 digit binary number by 3. I have this circuit that doing this process and I don't understand how it works. To multiply a number by 2 I need to shift the digits ...
2
votes
2answers
919 views

Verilog : Combining sequential logic with combinational logic

I am trying to implement a sequential shift and add 4bit multiplier as shown in the image. I am having a separate module for the 4 bit ripple carry adder. I have tested the adder module and it ...
1
vote
2answers
159 views

Ultra low power adders and multiplier

I am working on a low frequency 30 khz module that needs to have an ultra low power consumption. The problem is the research focuses on improving the performance of the adders and multiplier and ...
2
votes
1answer
317 views

Capacitor in an voltage doubler

In a standard diode voltage doubler (multiplier): Does the capacitor also plays the role of smoothing out the output voltage?
2
votes
2answers
179 views

What does register and bus size depend on?

So here is a hardware sequential multiplier depicted. Number A is 51 bits width, number B is 48 bits width. I have to choose the most efficient size of buses and registers (optimize according to ...
3
votes
1answer
140 views

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 ...
2
votes
1answer
2k views

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 ...
4
votes
3answers
351 views

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 ...
3
votes
0answers
551 views

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 ...
1
vote
1answer
723 views

How to multiply using gates?

I need to multiply 2 3bit numbers. I tried that: but it does not seem to work. In this example, the output should be 49. so that is that 77?
8
votes
3answers
774 views

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: ...
2
votes
1answer
149 views

Multiplying the deviation from mean of two time varying voltages

If I have two time varying voltages, \$V_1\$ and \$V_2\$ coming from two light detectors, how would I go about 'multiplying' the two signals with an electronic circuit? The voltages vary \$\pm 5V\$ ...
4
votes
2answers
289 views

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 ...