Contents
- 1 How does the load resistance affect the gain of an amplifier?
- 2 Which resistor determines the voltage gain in a common emitter amplifier?
- 3 What is input resistance of common emitter amplifier?
- 4 How is the gain of a common emitter amplifier chosen?
- 5 Which is the most common type of transistor amplifier?
How does the load resistance affect the gain of an amplifier?
Any load resistance appears in parallel with the collector resistance, so the voltage gain drops proportionally.
Which resistor determines the voltage gain in a common emitter amplifier?
Collector resistor
One final point, the voltage gain is dependent only on the values of the Collector resistor, RL and the Emitter resistance, (RE + Re) it is not affected by the current gain Beta, β (hFE) of the transistor.
What is the voltage gain of a common emitter amplifier where input resistance is 3?
Hence the value of the voltage gain for the common emitter amplifier is obtained as 4.8 for the given values of the current gain and the resistances. Thus the option (B) is correct.
What is input resistance of common emitter amplifier?
The input resistance of a common emitter amplifier is 330 Ω and the load resistance is 5 k Ω . A change of base current is 15 mu A results in the change of collector current by 1 mA .
How is the gain of a common emitter amplifier chosen?
When a common-emitter transistor amplifier without emitter degeneration is designed, the value of resistor RC is chosen to match the amplifier gain requirements. The gain of this amplifier is directly proportional to the resistor RC value.
What makes a common emitter a grounded emitter?
In a common-emitter without emitter degeneration, the bypass capacitor C B1 makes the ground connection of the emitter, so this configuration can also be called a grounded emitter. When this transistor amplifier is designed, the value of resistor R C is chosen to match the amplifier gain requirements.
Which is the most common type of transistor amplifier?
Common-emitter configurations are the most widely used type of transistor amplifier, due to their high-efficiency and positive gain greater than unity. Let’s take a closer look at common-emitter transistor amplifiers and discuss some things designers should consider during the common-emitter transistor amplifier design process.