Voltage manipulation

[drexchan]

Hello electronic heads...

need some help here..

I need an electronic circuit to:

1] From DEVICE A
input voltage: 4.75V to 5.25V
max input current: 0.1 mA
output voltage range: 0.50V to 4.50V.

factor P determines the output voltage, V1.

V1 (0.50V to 4.50V)​

2] first stage
to multiply V1 with a certain factor, m. The output, V2 should be adjustably 50% - 150% of V1.

V2 = mV1, m = 0.5 to 1.5 ...................... EQ. 1​

3] second stage
to constantly add (or substract) a certain adjustable voltage, c to (or from) V2, irregardence of its value. For example, constantly adding 0.50V to V2.

V3 = V2 + c, -0.5 < c < 0.5 ...................... EQ. 2​

combining EQ.1 and EQ.2,

V3 = mV1 + c ...................... EQ. 3​

if m = 1, c = 0, V3 = V1 (not adjusted)


4] To DEVICE B

what other details do you need. Let me know.

What is DEVICE A and DEVICE B.. you guess lar.. haha!!

Thanks in advance!!

 

[differ]

so you want a circuit that will multiply input voltage V1 by factor M and further add to a variable voltage C?

what kind of input current are we talking about?

 

[drexchan]

so you want a circuit that will ?

what kind of input current are we talking about?

Should be "multiply input voltage V1 by a variable factor M and further add to a variable voltage C"

source current to DEVICE A = max 0.1 mA

output (V1)... unspecified.. should be the same right?

Thanks first..

 

[drexchan]

Another forummer suggested this:

I think it will be much easier to use PIC controller or any microC for this application. Need to use ADC and DAC. Get the signal from DEVICE A and feed into ADC. Do some math processing and use DAC for output to DEVICE B.

 

[jaywat]

shoots...i have already returned my basic electronic back to my lecturer already..

 

[differ]

hmmm, at the tip of my brain... can't we just use an differential Op-Amp for the multiplier and then a standard voltage summer circuit

 

[khguan]

OMG... another hi-tech topic...

 

[jaywat]

Keep it up guys, i might be able to catch up later :D

 

[aerrike]

Maybe some kind of voltage regulator circuits ?
317 type 7805 , i think only

 

[www]

sorry , just found this topic. still blur..
maybe DC to DC converter kot..
5V convert to 12V.
12V convert to 28---30V.
correct if wrong.

 

[kruger]

aiiiyoooo... hi-tech talk... :D out of my league kekekeke :D

 

[lcchong]

device a = handphone charger?

 

[donCityZ]

bro drex, is it the current output totally does not matter? if u just need signal (ie, uA's of current, then easier control by PIC.... ) can make a hard coded electronic circuit design also.. but accuracy is of question.

 

[drexchan]

I have abandoned this project for a long long time already. I can't even understand what I wrote! LOL!

 

[renxun]

catch no ball...:hmmmm: