Electronics and Communication Engineering - Analog Electronics - Discussion
Discussion Forum : Analog Electronics - Section 2 (Q.No. 46)
46.
A non-inverting op-amp summer is shown in figure, the output voltage V0 is
3 sin (100t)
sin (100t)
2 sin (100t)
Answer: Option
Explanation:
I/p voltage = 
-1 + 1 + 
sin ωt sin ωt
.
Discussion:
2 comments Page 1 of 1.
Rommel said:
8 years ago
The circuit above lacks a feedback resistor. In this case, the amplifier acts a comparator with a reference voltage to GND or 0 V. Since the sum of the inputs at the noninverting terminal equates to (-2 +2 sinwt), the sine wave is basically offset to -2 V and will peak at 0 V. Since it never crosses the reference voltage of 0 V, the output of the amplifier should -VEE.
Raj said:
8 years ago
From where this (2+sin wt) came? please explain.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers