A circuit is shown to the right. a. Is this an example of positive feedback or negative feedback? b. If the circuit is an amplifier, what is the gain and is it inverting or noninverting? If the circuit is a comparator calculate the threshold voltage R2 1 ΚΩ R1 5 ΚΩ ww OA V_in sine 1 kHz +12V -12V V_out

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
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a).
b).
if
IKUL
Vin
between
sine
|KH|3
feedback element so
ive feedback amplifies. (sk connected
terminal
of op amplifier)
5 кл Resistance is
its Negative
skr
120
租
-120
negative
from the cismit
√²+ = OV
using virtual property N_ = V₂ = OV
Now apply Nodal analysis at v
V-- Vin
V_ - Vo
5k
Vo
Vin
+
Vo=
(-SK)
Vo = -5 Vin
Gain
Gain is Negative so its inverting amplifies.
Vo
op-amplifier is omparaton
if Vo = +1²V
it vo
the resold voltages
= -12
V_
are
= 0
Vin -
12
Vin= -1/² = -2.4 V
Vin=-(- 1²) = 2.40
-2.4V and 2.4v
Transcribed Image Text:a). b). if IKUL Vin between sine |KH|3 feedback element so ive feedback amplifies. (sk connected terminal of op amplifier) 5 кл Resistance is its Negative skr 120 租 -120 negative from the cismit √²+ = OV using virtual property N_ = V₂ = OV Now apply Nodal analysis at v V-- Vin V_ - Vo 5k Vo Vin + Vo= (-SK) Vo = -5 Vin Gain Gain is Negative so its inverting amplifies. Vo op-amplifier is omparaton if Vo = +1²V it vo the resold voltages = -12 V_ are = 0 Vin - 12 Vin= -1/² = -2.4 V Vin=-(- 1²) = 2.40 -2.4V and 2.4v
A circuit is shown to the right.
a. Is this an example of
positive feedback or
negative feedback?
b. If the circuit is an amplifier,
what is the gain
and is it inverting or
noninverting? If the circuit is a
comparator calculate the
threshold voltage
R2
1 kQ
ww
R1
5 ΚΩ
ww
+
OA
V_in
sine
1 kHz
+12V
-12V
V_out
Transcribed Image Text:A circuit is shown to the right. a. Is this an example of positive feedback or negative feedback? b. If the circuit is an amplifier, what is the gain and is it inverting or noninverting? If the circuit is a comparator calculate the threshold voltage R2 1 kQ ww R1 5 ΚΩ ww + OA V_in sine 1 kHz +12V -12V V_out
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