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Why opamp is called a voltage controlled voltage device?

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toram16

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why opamp is called voltage controlled voltage device,,,,,,,,,help me
 

Re: abt opamp........

toram16,
The output voltage is a function of the input voltage. Specifically, the output equals the differential input voltage times the open loop voltage gain.
Regards,
Kral
 

Re: abt opamp........

yes it is v-c-v device.
just see the eqution
 

Re: abt opamp........

See the Schematic internal diagram of op amps (Not the internal Circuir!!!).
 

Re: abt opamp........

Vo = Vin (Gain)

for inverting Amplifier = -(R2/R1)

for non inveting = 1+(R2/R1)

input and output is voltage so it is voltage control voltage.
 

Re: abt opamp........

yeah that is true..
the concept comes from the differential amplifier..
 

Re: abt opamp........

it is so because the opamp is dependent on voltages applied at its two terminals........if u see equations of both inverting and non inverting amplifier then u would be clear........
 

Re: abt opamp........

plz see the equations of inverting and non inverting configration of opamp
and then check the relationship b/w input and output
 

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