Feedback Connections in Amplifiers

The tutorial covers four types of negative feedback connections: voltage series, voltage shunt, current series, and current shunt. Each type is explained with its impact on input and output resistance, and its specific applications. The video also provides diagrams and a comparison of the feedback types, highlighting their characteristics and effects on voltage gain, bandwidth, and noise.

Which type of feedback connection increases the input resistance?

• None of the above

• Voltage shunt

• Current shunt

• Voltage series

What is the effect of a shunt feedback connection on input resistance?

• Doubles it

• No effect

• Decreases it

• Increases it

What is the nickname for the voltage series feedback connection?

• True voltage amplifier

• True current amplifier

• Transconductance amplifier

• Transresistance amplifier

In a voltage shunt feedback connection, how are the input and output resistances affected?

• Both increase

• Both decrease

• Input increases, output decreases

• Input decreases, output increases

What is the feedback ratio in a voltage shunt feedback connection?

• I0 by VF

• VF by V0

• V0 by IF

• IF by V0

What is the main application of a current series feedback connection?

• True voltage amplifier

• Transresistance amplifier

• Transconductance amplifier

• True current amplifier

In a current series feedback connection, how does the feedback gain (beta) relate to the output current?

• VF by I0

• IF by V0

• I0 by VF

• V0 by IF

Which feedback connection is known as a true current amplifier?

• Voltage series

• Current series

• Current shunt

• Voltage shunt

How does a current shunt feedback connection affect the output resistance?

• No effect

• Increases it

• Decreases it

• Doubles it

What happens to the voltage gain in any negative feedback connection?

• It doubles

• It remains the same

• It decreases

• It increases