The ac schematic of a common emitter stage is shown in Fig 7 2a Calculate the low frequency small signal voltage gain Iuml o Iuml i and use the zerovalue time constant method to estimate the 3 dB frequency for R S 10 k Icirc copy and R L 5 k Icirc copy Data Icirc sup2 200, f T 600 MHz (at I C 1mA),...

At low freq Zero value time constant R o r R S r b 52 k 10 k 34 ...

The ac schematic of a common-emitter stage is shown in Fig. 7.2a. Calculate the low-frequency small-signal voltage

Question:

The ac schematic of a common-emitter stage is shown in Fig. 7.2a. Calculate the low-frequency small-signal voltage gain Ï…_o/Ï…_iand use the zerovalue time-constant method to estimate the ˆ’3-dB frequency for R_S= 10 kÎ© and R_L= 5 kÎ©. Data: Î² = 200, f_T= 600 MHz (at I_C= 1mA), C_Î¼= 0.2 pF, C_je= 2 pF, C_cs= 1 pF, r_b= 0, r_o= ˆž, and I_C= 1 mA.

Fig. 7.2 a:

RL Rs Vị