Electronic Devices - Power Amplifiers
Exercise : Power Amplifiers - General Questions
- Power Amplifiers - General Questions
- Power Amplifiers - Filling the Blanks
- Power Amplifiers - True or False
6.
A silicon power transistor is operated with a heat sink (
SA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has JC = 0.5º C/W, and the mounting insulation has CS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?
SA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has JC = 0.5º C/W, and the mounting insulation has CS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?7.
Refer to this figure. The dc voltage on the collector, VC, is
8.
What is the ratio of the secondary voltage to the primary voltage with the turn ratio in the windings?
9.
Class ________ amplifiers are normally operated in a push-pull configuration in order to produce an output that is a replica of the input.
10.
You find that there is an input signal on the base of Q1 and Q2. However, there is no output signal. You then measure the dc voltages on Q2 and find them to be all 0 V. The possible trouble might be
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers