Power Ratio (PR) in dB
A stereo amplifier takes the output of a CD player, for example, and increases the power to an audible level. Suppose the output of the CD player is 25 mW and the desired audible output is 100 W per stereo channel, find the power ratio of the amplifier per channel in decibels (dB), where the power ratio in dB is
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ANALYSIS+DESIGN OF LINEAR CIRCUITS(LL)
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- Frequency (kHz) 2 4 6 8 10 12 14 16 18 20 Current (mA) 7.48 5.51 4.23 3.32 2.71 2.31 2 1.77 1.57 1.42 Impedance (Ω) 7958.25 3979.87 2654.08 1991.43 1594.04 1329.28 1140.3 998.7 888.67 800.75 REPRESENT GRAPHICALLY THE CURRENT AND IMPEDANCE AS A FUNCTION OF FREQUENCYarrow_forwardIn the circuit in the figure, Vcc= 18 V, Rs1 = 0.9 kohm, Rohm = 0.5 kQ, R1 = 75 kohm, R2 = 15 kohm, RC = 2.2 kohm, RE = 1 kohm and B = 120. It is also known that Cwi = 6 pF, Cwo = 10 pF, Cbc = Cu = 7 pF, Cbe = C = 44 pF and Cce = 11 PF. Accordingly, considering the frequency response of the circuit, what would the high cutoff frequency (fH) be? NOTE-1: The output impedance of the transistor is ro = 20 k and will be taken into account in the calculations. NOTE-2: high frequency dependence of hfe, B. will be taken into account.arrow_forwardUsing impedances approximation, obtain the TF Eo/Eiarrow_forward
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