Question
Download Solution PDFFor the voltage series feedback amplifier shown in figure below which of the statements option given is TRUE?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The comparison of different feedback configurations is as follows:
|
Parameter |
Voltage - Series |
Current - Series |
Current - Shunt |
Voltage-Shunt |
|
Input Resistance |
Increases \({R_{if}} = {R_i}\left( {1 + A\beta } \right)\) |
Increases \({R_{if}} = {R_i}\left( {1 + A\beta } \right)\) |
Decreases \({R_{if}} = \frac{{{R_i}}}{{1 + A\beta }}\) |
Decreases \({R_{if}} = \frac{{{R_i}}}{{1 + A\beta }}\) |
|
Output Resistance |
Decreases \({R_{if}} = \frac{{{R_i}}}{{1 + A\beta }}\) |
Increases \({R_{if}} = {R_i}\left( {1 + A\beta } \right)\) |
Increases \({R_{if}} = {R_i}\left( {1 + A\beta } \right)\) |
Decreases \({R_{if}} = \frac{{{R_i}}}{{1 + A\beta }}\) |
From here we may conclude that input impedance increases while output impedance decreases in voltage series feedback amplifier
Last updated on May 8, 2025
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