Introduction to Sine Wave Oscillators

Question 1

When an oscillator is first turned on, noise is generated by the _______.

amplifier
resistors
DC bias voltage
feedback circuit

Answer 1

resistors

Question 2

Oscillators using common emitter amplifiers require the output signal to be shifted by _______.

0 degrees
45 degrees
90 degrees
180 degrees

Answer 2

180 degrees

Question 3

The frequency of an oscillator is determined by the _______.

components in the feedback circuit
components in the amplifier
degenerative feedback
regenerative feedback

Answer 3

components in the feedback circuit

Question 4

Oscillators using common collector amplifiers require the output signal be shifted by _______.

0 degrees
45 degrees
90 degrees
180 degrees

Answer 4

0 degrees

Question 5

When an oscillator is turned on, the amplifier first increases the _______.

feedback circuit’s output
base bias voltage level
DC operating voltage
noise

Answer 5

noise

Question 6

The frequency of this oscillator circuit is determined by the _______.

resonant frequency of C1 and L1
resonant frequency of R4 and C3
phase shift of C2 and R2
phase shift of R4 and C3

Answer 6

resonant frequency of C1 and L1

Question 7

The frequency of this oscillator circuit is determined by the _______.

phase shift of C1 through C3
resonant frequency of C1 and R1
resonant frequency of C4 and R6
phase shift of C1 and R1 plus C2 and R2 plus C3 and R4

Answer 7

phase shift of C1 and R1 plus C2 and R2 plus C3 and R4

Question 8

The frequency of this oscillator is determined by the _______.

phase shift between Y1, C1, and R2
resonant frequency of Y1 and C1
resonant frequency of Y1
resonant frequency of C1

Answer 8

resonant frequency of Y1

Question 9

The components that make up the feedback circuit in this oscillator are _______.

C1
Y1
C1 and R2
C2 and R4

Answer 9

Y1

Question 10

In this oscillator circuit, C2 and C4 perform _______.

frequency determination
input/output coupling
phase shifting
limiting

Answer 10

input/output coupling