BJT AC Analysis

What is the equation uses to calculate the value of re?

• 20mv/IE

• 26mv/IE

• 26mv/IC

• 25mv/IE

Choose the correct component in the re model shown in the figure:

• (i) re, (ii)  $\beta Ib$  , (iii) ro 

• (i)  $\beta re$  , (ii) Ib, (iii) ro

• (i)  $\beta re$  , (ii)  $\beta Ib$  , (iii) ro

• (i)  $\beta$  , (ii) Ib, (iii) ro

In AC analysis, DC supply, coupling capacitor and bypass capacitor is replaced with _________

Choose the correct statement on AC analysis of BJT Common Emitter Emitter bias circuit in the following circuit

• resistor R_E is absence due to short circuit equivalent of bypass capacitor C_E

• resistor R_E is absence due to open circuit equivalent of bypass capacitor C_E

• 
• 

Negative sign in the voltage gain equation shows ......... degree phase shift between input and output

Calculate the value of IE and Av of the following circuit and then choose the most appropriate answer. Assume ro= $\infty\Omega$  

• IE=1.89 mA

• IE = 1.25 mA

• Av= -359.25

• Av=-406.98

In the following circuit, can you apply approximate method to solve the circuit

• Yes

• No

A Common Emitter Voltage Divider bias circuit with R1=  $62k\Omega$  , R2=  $9.1k\Omega$  , RE= $1k\Omega$  , RC= $3.9k\Omega$  ,  $\beta=80$  and Av=-300, calculate the value of re.

Choose the correct formula for BJT

• $IE=IC+IB$

• $I_C=\beta I_E$

• $\alpha=\frac{I_C}{I_E}$

• $I_C=\beta I_B$

The given circuit has a voltage gain of -1000. If the input voltage Vi is 1mV. What is the value of Vo in the circuit?