Quiescent Current y Supply Current ???

[lean]

In a operational Amplifier

What is Quiescent Current?

and Supply Current?

 

[flatulent]

Quiescent is the value when there is no signal applied to the amplifier. Supply is the value drawn from the power supply. The internal stages that operate class A have the same current independent of signal level. Output stages are frequently class B and the current drawn from the supply by these stages depend on the output signal level and the load impedance.

 

[lean]

I want to know Who is the current used up by the operational amplifier?

and the difference among Supply Current y Bias Current

Thanks

 

[j2005]

I want to know Who is the current used up by the operational amplifier?

and the difference among Supply Current y Bias Current

Thanks

Supply current is the total current the opamp draws from the power supply (VCC). Bias current is a small current it needs that's normally provided by a current reference circuit, e.g. a bandgap, to get it working.

 

[lilac]

Usually both of them are not the total current consumed by the Opamp. because the character of 'current controll voltage.' one current can be copied to severals. so the current consumed by the Opamp is the total current of all subcircuit .