ECE 2020 Fall 2022 HW9
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1. For the circuit below assume an ideal op amp. Find Vo/Vs.
R1 =2kΩ, R2 =5kΩ, R3 =8kΩ and R4 =20kΩ.
2. In the circuit below, assume R1=R2 = 1kΩ and Rg = Rf = 10kΩ VCC = -VEE = 20V
a. Find the differential gain,
b. Assuming that the op-amp is rail-to-rail (Vout can go all the way to the power supply), what is
the largest difference in voltage (V2-V1) that will be properly amplified by this circuit?
3. In the circuit below, assume the op amp is ideal.
a. Find the transfer function Vo/Vin (leave Rf, Rs and C
as variables).
b. What type of filter is it?
If Rf = 10kΩ, Rs = 1kΩ, C =2μF:
c. Find the passband gain.
d. Find the corner frequency.
e. Sketch the Bode plot for the magnitude of the
transfer function.
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+ 5000 + 8000 ) = 器品
品⼆品 × 品⼆只 × 这⼆ – 号√ 5 弱
Vz = O = 3 “
0=⇒ 品⼆ – 符 ⇒ 品⼆ = – 000000 =分
( b ) Ur – { . = 品 = 20
cas ⼗ = 0 1 ” Ls – 10 v , – 00 = 0
ω 0 = 1123 … ou
= 10 Wz – 1 Ov
{ ovs – 10 vzfl 3
via tual ground : ∴ 品
at Un : vn – vin
Un = Up = O , ∴
, ⼀品 = E 0 jwc
~wink— v. k , Wojwas 及 1
… ( RsRa+及
s ( iw ε RAt ( }
– 货品 ( 及×+ 1
low pabs ti ( teh (
w ~ so ,tEwb =izaws
HEu ) = 0 J
⼀览 : … = -10000…odB. log 10 ) :
000002 × 10000
= 50 had {sea = 品≈ 2 . 96 -室 叩
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