Yn (+) O- A2a VOur (+) RA RB RA VOUT (-) A2b Figure Q2a Figure Q2a shows the circuit diagram of part of an instrumentation amplifie Show that the differential and common mode gains of the circuit are given by 2R, + R, and AyeM =1 respectively. R, AypıFF

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How did they get case 1 and case 2 and simplify break down for a dummy?
Q2
Vn (+) O-
A2a
VOur (+)
RA
RB
RA
A2b
Vour (-)
+
Figure Q2a
Figure Q2a shows the circuit diagram of part of an instrumentation amplifier.
Show that the differential and common mode gains of the circuit are given by
(a)
2R, + R,
AypIFF
and AycM = 1 respectively.
R,
.
Transcribed Image Text:Q2 Vn (+) O- A2a VOur (+) RA RB RA A2b Vour (-) + Figure Q2a Figure Q2a shows the circuit diagram of part of an instrumentation amplifier. Show that the differential and common mode gains of the circuit are given by (a) 2R, + R, AypIFF and AycM = 1 respectively. R, .
Case I
nd VinE) =o
Conader VIN(+) ony
RA
Yout, ()
Vin (+)
%3D
RB
Vout, -)
RA
Vin t)
RB/
%D
1
Case I
Consider Vin-) only nd Vn (+) =0
- RA
Rg
Voutz (+) =
* Vin)
%3D
RA
Voutz ()
(1+) Vin -)
RB
Transcribed Image Text:Case I nd VinE) =o Conader VIN(+) ony RA Yout, () Vin (+) %3D RB Vout, -) RA Vin t) RB/ %D 1 Case I Consider Vin-) only nd Vn (+) =0 - RA Rg Voutz (+) = * Vin) %3D RA Voutz () (1+) Vin -) RB
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