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研究所、轉學考(插大)◆電子學
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110年 - 110 國立中央大學_碩士班招生考試_光電類：電子學#105504
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題組內容
2. For an active filter shown in Figure 2, please answer the following questions:
(1) Find R
2
and C
2
which can increase the peak gain to 10. (8%)
其他申論題
(b) Show that this active filter is a band-pass filter. (3%)
#448422
(c) For R1= 1 kΩ and C1 = 0.1 μF, find R2and C2 so that the band-pass filter has a resonant frequency at 1600 Hz and unity peak gain. (6%)
#448423
(d) Draw the Bode plot for the magnitude of the band-pass filter in (c). (5%).
#448424
(e) For the band-pass filter in (c), find the gain of the resonance peak. (3%)
#448425
(a) Please find the reference current (IREF) for the current mirror.
#448427
5% (b) If a load 2 kΩ is connected at the drain, please find and output resistance
#448428
5% (c) If now the load 2 kΩ is connected at the drain with a capacitor C, what is the minimal C to operate this circuit at.You can assume this is the only capacitor seem from this circuit.
#448429
10% (d) if now the load 5kΩ is moved from the drain to the source with a capacitor. What are the ?
#448430
(5%) (a) What is the conducting current () for the BJT differential pair?
#448431
(5%) (b) Since R1 and R2 are different, what is the resulted offset voltage () at input? (hints: you can estimate this by dividing the output offset by the differential gain, Ad).
#448432
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