Current differen power amp

[locky_z]

(My english is BAD.)

From LM359(Norton OP AMP) PDF,I design this power AMP.
1.It use all NPN type tranistror.
2.The THD is low and even harmonious much more than odd harmonious. At Vout=4Vrms( 8ohm 1Khz) THD=0.1% and even harmonious(2KHz) is -43dB,odd harmonious(3KHz) is -67dB.
3.I think it is a CFB amp.

 

[lineup]

Norton - another All NPN amplifier

locky_z
Good circuit 😉
Norton is interesting.
We can get VERY FAST amplifiers like this.

I attach the LM359 circuit diagram.

 

[lineup]

To overcome Lower Input impedance of Norton
we can use JFET Differential Input stage.