[3] 4.1 (a) What are corner frequencies and why are they important? (b) In what way does the use of a corner frequency a

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3 4 1 A What Are Corner Frequencies And Why Are They Important B In What Way Does The Use Of A Corner Frequency A 1 (34.58 KiB) Viewed 36 times

[3] 4.1 (a) What are corner frequencies and why are they important? (b) In what way does the use of a corner frequency affects the 3-dB point of a [2] bode plot. 4.2 Use bode plot to sketch the frequency response for an amplifier, from low [6] frequency (LF) to high frequency (HF). Among other things, the graph should show the following features: lower and upper cut-off frequencies, corner points, mid-frequency gain, slope in LF and HF region, amplifier bandwidth and phase response. 4.3 From first principles, deduce equations to show how negative feedback can be used for achieving gain stability. [6] 4.4 An amplifier without feedback has a gain of 200 000 that can change by 10%. (a) Determine the magnitude of the feedback factor / required to reduce the change to 1%. (b) Hence calculate the amplifier gain G with feedback, and comment on your results. [4]