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Zerospan circuits? 
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#1
Apr511, 07:17 PM

P: 27

What exactly is a zerospan circuit? How does it work?



#2
Apr511, 08:04 PM

Mentor
P: 41,115

What is the context of your question? Or did you just hear the term someplace and were wondering what it meant? 


#3
Apr511, 10:07 PM

P: 27

For example like this
Input range 100mV to 400mV and output Range is 10V to 10V. And it says design a zerospan ckt, edit:changed input range from 40mV(mistake) to 400mV 


#4
Apr511, 11:35 PM

Sci Advisor
P: 4,032

Zerospan circuits?
I haven't heard the trem "zerospan" before, but it probably means two different adjustments.
They want 100 mV (DC) to produce 10 volts out and 40 mV (DC) to produce +10 Volts out. So, the input signal varies by 60 mV and the output signal varies by +20 Volts so you can work out the gain (and whether the output is inverted). Also, a DC offset would be involved. 


#5
Apr611, 05:54 AM

P: 27

ok. I am to design a ckt. where the inputs range from 100mV to 400mV and the output ranges from 10V to 10V. I have attached my workings and a final design of the op amp ckt. Am I on the right track?



#6
Apr611, 06:31 AM

Sci Advisor
P: 4,032

The input voltages were 100 mV and 40 mV.
I think you are using 400 mV. I got a gain of 333. 


#7
Apr611, 06:37 AM

P: 27




#8
Apr611, 10:21 AM

Sci Advisor
P: 4,032

100 mV gives 10 V out
400 mV gives +10 V out So, should you be using an inverting amplifier? 


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