Digital Electronics - Digital Signal Processing - Discussion
Discussion Forum : Digital Signal Processing - General Questions (Q.No. 9)
9.
A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k
. If 50 
A of current is through the resistor, voltage out of the circuit is ________.
. If 50 A of current is through the resistor, voltage out of the circuit is ________.Discussion:
6 comments Page 1 of 1.
Dr.S.S.limaye said:
1 decade ago
If you use positive reference voltage, which is assumed here, then output is negative because OPAMP is acting as inverting amplifier. For positive output, you need to use negative reference voltage.
Rajasree said:
1 decade ago
V=I*Rf
V=(50*10^-6)(12*10^3)
V=0.6volt
How the negative sign came? if any one one know the answer please reply me?
V=(50*10^-6)(12*10^3)
V=0.6volt
How the negative sign came? if any one one know the answer please reply me?
Divyanshu said:
1 decade ago
Because a binary-weighted-input digital-to-analog converter uses negative reference voltage.
Rami said:
1 decade ago
Because of negative feedback used for amplifier. So that we get the answer in negative.
Vijay said:
1 decade ago
Negative sign due to the negative ref voltage of opamp.
Tasher ALi Sheikkh said:
8 years ago
Because of negative reference voltage.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers