Complementary differential input stage

[dimitri]

Marcel, I remember this circuit but cannot find a thread. What distortion did you get from this ckt (limited by Q1-Q4 matching)? Thx

 

[Citizen124032]

It's for converting balanced signals to unbalanced and the other way around

Alike (but not similar)...
{not intending to go offtop}

 

[Giorgio_Milan]

I see that Erno Borbely uses 100ohm resistors for that purpose:

 

[ctrlx]

150 MHz analogue oscilloscope.....................probe (set to 1:1)

but then the probe bw is 1/10th of its X10 bw

 

[MarcelvdG]

Marcel, I remember this circuit but cannot find a thread. What distortion did you get from this ckt (limited by Q1-Q4 matching)? Thx

No idea, I never measured that.

 

[PMA]

I see that Erno Borbely uses 100ohm resistors for that purpose:

Same here.