(B)Element 8-18 Power Supplies

Question 1

An advantage of resonant charging is that:

Answer 1

reduces high voltage power supply requirements

Question 2

The characteristics of a Field Effect transistor used in a modern RADAR switching power supply can be compared as follows:

Answer 2

On state compares to pure resistor. Off state compares to a mechanical relay

Question 3

A pulse width modulator in a switching power supply is used to:

Answer 3

vary the duty cycle of the regulator switch to control the output voltage

Question 4

In a fixed frequency switching power supply, the pulse width of the switching circuit will increase when the:

Answer 4

load impedance decreases

Question 5

A major consideration for the use of a switching regulator power supply over a linear regulator is:

Answer 5

the overall efficiency of a switching regulator us much higher than a linear power supply

Question 6

Which of the following characteristics are true of a power MOFSET and in a RADAR switching supply?

Answer 6

high input impedance; failure mode can be gate punch-through