a. wide tuning range, large number
of
harmonics,
and
low
output
at
frequencies below desired frequency.
b. large number of harmonics, low output at
frequencies
below
desired
frequency, and high stability of operation.
c. low output at frequencies below
desired
frequency,
high
stability
of
operation, and wide tuning range.
d. high stability
of
operation,
wide
tuning
range,
and
large
number
of
harmonics.
16. Compared
with
the
circuit,
the
overtone
differs in its
a. need for a specially designed crystal, use
of
frequency-selective
feedback, and range of operating frequencies.
b. use of frequency-selective feedback, range of operating frequencies, and
negligible number of subharmonic frequencies.
c. range
of
operating
frequencies,
negligible
number
of
subharmonic
frequencies, and need for a specially designed crystal.
d. negligible number of subharmonic frequencies, need for
a
specially
designed crystal, and use of frequency-selective feedback.
17. If a transistor is being used as a converter, it must be operated on the
curved portion of its dynamic characteristic curve.
Operation at this point is
required in order to
a. produce four major frequencies in the output.
b. incorporate the filtering action of the collector circuit.
c. establish the required low input and output resistances.
d. use the internal feedback for neutralizing the generated frequency.
18. In the mixer circuit shown in figure 2-3, what frequencies appear in the
collector circuit that are not coupled through the transformer to the following
stage?
a. 500 kHz, 1 MHz, and 1.5 MHz
b. 500 kHz, 1 MHz, and 2.5 MHz
c. 500 kHz, 1.5 MHz, and 2.5 MHz
d. 1 MHz, 1.5 MHz, and 2.5 MHz
19. Stability of the tickler-coil oscillator shown in figure 2-5 is based on
several factors incorporated in the circuit.
The bias stability and frequency
stability of the circuit are determined by the
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