Question

For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2kohm is 2V. Suppose the current amplification factor of the transistor is 100, find the input signal voltage and base current, if the base resistance is 1kohm.

Answer 1

Hey !!

Given, Rc = 2 kΩ = 2 × 10³  Ω

     Rb = 1 kΩ

      V₀ = 2V

Input voltage (Vi) = ?

     β = Ic / Ib = 100

 V₀ = IcRc = 2 V

Ic = 2 / Rc = 2 / 2 × 10³ Ω = 10⁻³ A = 1 mA

Base current

         Ib = Ic / β

= 10⁻³ / 100

          = 10 × 10⁻⁶ A = 10 μA

Base resistance

         Rb = Vbb / Ib

   Input voltage,

                        Vi = Rb / Ib

= 1 × 10³ × 10 × 10⁻⁶

         = 0.01 V

Good luck !!

Answer 2

Answer:

this will help you.....