Calculate the overall voltage gain in each expressed both directly and in decibels.
An amplifier with 40 dB of small-signal, open voltage gain, an input resistance of 1 M Ohm, and an output resistance of 10 Ohm, drives a load of 100 Ohm. What voltage and power gains (expressed in dB) would you expect with the load connected? If the amplifier has a peak output limitation of 100mA , what is the rms value of the largest sine-wave input for which an undistorted output is possible? What is the corresponding output power available?
A 10-mV signal source having an internal resistance of 100 k Ohm is connected to an amplifier for which the input resistance is 10 k Ohm, the open-circuit voltage gain is 1000 , and the output resistance is 1 k Ohm. The amplifier is connected is turn to a 100- Ohm load. What overall voltage gain results