Voltage manipulation

drexchan

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drexchan

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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!!
 
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drexchan

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drexchan

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differ said:
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..
 
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drexchan

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drexchan

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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

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jaywat

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

jaywat

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jaywat

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

www

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www

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kl
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.
 

lcchong

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lcchong

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device a = handphone charger? :confused:
 

donCityZ

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donCityZ

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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.
 

donCityZ

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donCityZ

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oh yah... didnt saw the date of post is 2005.. LoL...!!