26. Under which of the following condition(s) is the current gain ?
27. The ________ configuration is frequently used for impedance matching.
28. Refer to this figure. You notice while servicing this amplifier that the output signal at Vout is reduced from normal. The problem could be caused by
29. When the bypass capacitor is removed from a common-emitter amplifier, the voltage gain
30. Refer to this figure. Determine the value of VC.
31. In a common-base amplifier, the input signal is connected to the
32. Which of the following is (are) true to achieve a good overall voltage gain for the circuit?
33. To analyze the common-emitter amplifier, what must be done to determine the dc equivalent circuit?
34. For the common-emitter amplifier ac equivalent circuit, all capacitors are
35. Refer to this figure. If an emitter bypass capacitor was installed, determine the value of Rin(base).
36. Under which of the following conditions is the output impedance of the network approximately equal to RC for a common-emitter fixed-bias configuration?
37. Which of the following gains is less than 1 for a common-base configuration?
38. Which of the following define(s) the conversion efficiency?
39. The dc emitter current of a transistor is 8 mA. What is the value of re?
40. Which of the following should be done to obtain the ac equivalent of a network?
41. In an unbypassed emitter bias configuration hie replaces ________ in the re model.
42. Which of the following is (are) true regarding the input impedance for frequencies in the midrange 100 kHz of a BJT transistor amplifier?
43. For the collector dc feedback configuration, there is a ________ phase shift between the input and output signals.
44. A common-collector amplifier has ________ input resistance, ________ current gain, and ________ voltage gain.
45. The total gain of a multistage amplifier is the ________.
46. Which of the following configurations has an output impedance Zo equal to RC?
47. Refer to this figure. Find the value of Rin(base).
48. For a common-emitter amplifier, the purpose of the emitter bypass capacitor is
49. For BJT amplifiers, the ________ gain typically ranges from a level just less than 1 to a level that may exceed 1000.
50. The loaded voltage gain of an amplifier is always more than the no-load level.