Question

The high-frequency response of a transistor amplifier is limited by stray capaci illustrated in Figure 21-3 which the resistance RIN is equal to the capacitive reactance Xc of the stra An equivalent parallel RC circuit can simplify the problem. Compute the cutoff for the circuit shown by setting RIN Xc and solving for fc (a) y capaci frepueto RIN Cstray stray 40 pF Figure 21-3 (b) How do the branch currents compare at the cutoff frequency? (c) Explain what happens above this frequency to the current in the equivalent paralle RC circuit. If the stray capacitance in Figure 21-3 is increased, what happens to the cutoff frequency 176

Answer 1

12) 3) -265,258 욕 K42 マオ 다-Ke stray Capacitana ir increased kCatoff frequency decreae