[sdiy] Transistor type flip-flop circuit.. What makes the 'power up' state of it ?

[Jean-Pierre Desrochers]

Hi list,

I have a question about the behaviour of transistor type flip-flop circuit

When the DC power is applied to it..

The following schematic of Boss CE-2 pedal shows the flip-flop at the bottom
right.

Why when the DC power is applied :  collector of Q6 goes high (to make the
pedal in the 'no effect')

And it's not Q7 that goes this way instead ?

I know that C23 (.01uf) pull down the trigger input when DC is applied
to put the pedal in the 'no effect' position, but why is Q6 selected ?

This is a 'balanced' flip flop circuit and both sides should behaves the
same

But some kind of selection is done here.

 

Could someone explain that behaviour ?

 



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