MCQOPTIONS
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MCQOPTIONS
| 1. |
An inverting scaling amplifier has three input voltages Va, Vb and Vc. Find it output voltage? |
| A. | V<sub>O</sub>= – {[(R<sub>F</sub>/R<sub>a</sub>)×V<sub>a</sub>] +[(R<sub>F</sub>/R<sub>b</sub>)×V<sub>b</sub>]+[(R<sub>F</sub>/R<sub>c</sub>)×V<sub>c</sub>]} |
| B. | V<sub>O</sub>= – [(R<sub>F</sub>/R<sub>a</sub>)+(R<sub>F</sub>/R<sub>b</sub>)+(R<sub>F</sub>/R<sub>c</sub>)]×[( V<sub>a</sub> +V<sub>b</sub>+V<sub>c</sub>)]. |
| C. | V<sub>O</sub> = – {[(R<sub>a</sub>/R<sub>F</sub>)×V<sub>a</sub>] +[(R<sub>b</sub>/R<sub>F</sub>)×V<sub>b</sub>]+[(R<sub>c</sub>/R<sub>F</sub>)×V<sub>c</sub>]} |
| D. | None of the mentioned |
| Answer» B. V<sub>O</sub>= ‚Äö√Ñ√∂‚àö√ë‚àö¬® [(R<sub>F</sub>/R<sub>a</sub>)+(R<sub>F</sub>/R<sub>b</sub>)+(R<sub>F</sub>/R<sub>c</sub>)]‚Äö√†√∂‚àö‚â•[( V<sub>a</sub> +V<sub>b</sub>+V<sub>c</sub>)]. | |