Given the diferrential amplifier with a constant-current source at the emitter (instead of the resistor RE), Assume Q1, Q2, and Q3 are identical transistors with β=hfe=100 and VBE=0.7V. (a) Determine Io, Ie1, and Ie2. For DC Analysis: Ie1=Ie2 due to symmetry (b) Determine hie1 and hie2. (c) Determine the differential gains Ads (for single-ended) and Add (for double ended).

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Given the diferrential amplifier with a constant-current source at the emitter (instead of the resistor RE),
Assume Q1, Q2, and Q3 are identical transistors with β=hfe=100 and VBE=0.7V.

(a) Determine Io, Ie1, and Ie2.
For DC Analysis: Ie1=Ie2 due to symmetry
(b) Determine hie1 and hie2.
(c) Determine the differential gains Ads

(for single-ended) and Add (for double ended).

Vec=9V
Re
10k2
Re
Vol
Vout
Vo2
QI
Q2
Vs1
Vs2
Io
Q3
R1
Ika
Constant
Current
Source
3R2
5.īkO
Vee=-9V
Transcribed Image Text:Vec=9V Re 10k2 Re Vol Vout Vo2 QI Q2 Vs1 Vs2 Io Q3 R1 Ika Constant Current Source 3R2 5.īkO Vee=-9V
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