Question about amplifier

[Short_Circuit]

Hi
I'm trying to design my own amplifier but i don't know how to determine the value of the quiescent current.
Can anybody give me some equation or advice ???

[windoze killa]

Certainly.

But can we have a bit more info. Type of amp? Audio? RF? Type of active device?

[zicco]

yeah really which type of the amplifier are u building let us know

[audioguru]

You can look at spec's for audio power amp ICs.
A little LM386 gives 300mW to an 8 ohm speaker and has a quiescent current of 4mA.
A car radio power amp gives 4W to a 4 ohm speaker and has a quiescent current of about 30mA.
A higher power home stereo amp gives about 70W to an 8 ohm speaker and has a quiescent current of about 60mA.

The idle current in the output complementary emitter follower transistors is adjusted to eliminate crossover distortion.