Transconductance and BJT Analysis

The video tutorial on Engineering Education explains how to find the output voltage (Vout) at the collector of a BJT in a common emitter configuration. The problem is introduced with given parameters: VBE, transconductance, and output resistance. The instructor guides viewers to use a reference handbook to understand the low-frequency small signal equivalent circuit of the BJT. The circuit is drawn and analyzed, focusing on the dependent current source and output resistor. The calculation of Vout is demonstrated step-by-step, resulting in a final value of 4 volts. The video concludes with a call for viewer interaction.

What is the configuration of the BJT discussed in the video?

• Common base

• Common collector

• Common gate

• Common emitter

What is the value of VBE given in the problem statement?

• 1.0 volts

• 0.3 volts

• 0.5 volts

• 0.7 volts

What is the transconductance value provided in the video?

• 3 millisiemens

• 4 millisiemens

• 2 millisiemens

• 1 millisiemens

What is the purpose of the small signal equivalent circuit in the analysis?

• To determine the input voltage

• To calculate the power consumption

• To find the output voltage

• To measure the frequency response

In the equivalent circuit, what does the dependent current source represent?

• VBE

• gm VBE

• ro

• Vout

How is the output voltage Vout calculated in the video?

• By dividing gm by ro

• By subtracting VBE from gm

• By multiplying gm VBE and ro

• By adding gm and ro

What is the final calculated value of Vout?

• 8 volts

• 4 volts

• 6 volts

• 2 volts