Questions & Answers of Amplifiers - feedback and power

In the ac equivalent circuit shown in the figure, if iin  is the input current and RF  is very large, the type of feedback is

The feedback topology in the amplifier circuit ( the base bias circuit is not shown for simplicity) in the figure is

The desirable characteristics of a transconductance amplifier are

In a voltage-voltage feedback as shown below, which one of the following statements is TRUE if the gain k is increased?

 

 

In a transconductance amplifier, it is desirable to have