Phase splitter Concertina Phase Splitter
Phase splitter Concertina Phase Splitter
Phase splitter Concertina Phase Splitter
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<strong>Phase</strong> <strong>splitter</strong><br />
Synthesis<br />
The biasing voltages of the collector (V CQ) and emitter (V EQ) are chosen so to ensure<br />
maximum dynamic of the signals on the collector and emitter.<br />
V CQ=3V CC/4 e V EQ=V CC/4 consequently V CEQ=V CC/2<br />
1) On R C and R E there is the same voltage drop, therefore the two resistors must have the<br />
same value (R) which is obtained by the equation on the output mesh:<br />
R1<br />
R2<br />
V B<br />
I C<br />
BJT<br />
V CC<br />
Rc<br />
V CQ<br />
V EQ<br />
R E<br />
V −V<br />
VCC = I CQ·2·R+ VCEQ ⇒ R=<br />
I ·2<br />
2) Calculate R 2 :<br />
3) Calculate R 1:<br />
CC CEQ<br />
CQ<br />
1 1<br />
R2 = ⋅hFE ⋅ R = ⋅<br />
10 10<br />
h FE min·hFEmax ⋅R<br />
or<br />
VB R2= I<br />
VB =<br />
10⋅I VB<br />
=<br />
10⋅I<br />
⋅ h FE min·hFEmax R2BQ CQ<br />
V −V<br />
R = R<br />
CC B<br />
1<br />
VB<br />
2
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