Electronics 2: Electronics
Circuits Analysis and Design
Calculate the 𝑉𝑜 in the circuit.
300 KΩ
600 KΩ
25 mV
-20 mV
15 KΩ
30 KΩ
+
+
-
1
30 KΩ
15 KΩ
+
𝑉𝑜
Electronics 2: Electronics
Circuits Analysis and Design
Draw a cascaded three-stage op amp
circuit, with gains +15, -22, and -30. Use a 420
k Ω feedback resistors for all stages. What
output voltage results for an input of 𝑉𝑖 =
80𝜇𝑉
2
Electronics 2: Electronics
Circuits Analysis and Design
330 kΩ
470 kΩ
33 kΩ
𝑉𝑖
12 𝑚𝑉
-
47 kΩ
+
+
47 kΩ
𝑉2
Determine the output voltage
of the circuit.
3
-
18 𝑚𝑉
𝑉𝑜
Electronics 2: Electronics
Circuits Analysis and Design
Show the connection of
two op-amps
stages to provide outputs that are 15 and -30
times larger than the input. Use a feedback
resistor 𝑅𝑓 = 150𝑘Ω in all stages.
4
Electronics 2: Electronics
Circuits Analysis and Design
What is the closed-loop voltage gain for
each switch position?
𝑅𝑓
47 kΩ
1
18 kΩ
39 kΩ
3
𝑉𝐶𝐶
R1
+10V
220 Ω
-
𝑉𝑜𝑢𝑡
+
𝑉𝑖𝑛
-10V
𝑉𝐸𝐸
5
Electronics 2: Electronics
Circuits Analysis and Design
Solve for the output voltage.
𝑅𝑓
47 kΩ
18 kΩ
39 kΩ
150 𝑘Ω
-
𝑉1 = 2𝑉
10 kΩ
𝑉2 = 1𝑉
10 kΩ
6
+
𝑉𝑜𝑢𝑡