Explanation: Summing, scaling or averaging amplifiers are commonly used in audio mixers, in which a number of inputs are added up to produce a desired output. 11. The following circuit represents an inverting scaling amplifier. Compute the value of RoM and VO?
A. VO = -0.985v ; RoM = 111.11Ω
B. VO = -2.567v ; RoM = 447.89Ω
C. VO = -1.569v ; RoM = 212.33Ω
D. VO = -1.036v ; RoM = 320.56Ω
Answer:A
Explanation: Summing, scaling or averaging amplifiers are commonly used in audio mixers, in which a number of inputs are added up to produce a desired output. 11. The following circuit represents an inverting scaling amplifier. Compute the value of RoM and VO?
A. VO = -0.985v ; RoM = 111.11Ω B. VO = -2.567v ; RoM = 447.89Ω C. VO = -1.569v ; RoM = 212.33Ω D. VO = -1.036v ; RoM = 320.56Ω
Explanation: VO = – {[(RF/Ra)×Va]+[(RF/Rb)×Vb]+[(RF/Rc)×Vc]}