Figure 3-4.
Slope detector.
in amplitude and frequency.
The IF signal applied to diode detector CR1 is
rectified, filtered by coil L2, and developed across resistor R4.
The output of
the current output-type diode detector is an audio signal.
c. Component Functions. Capacitor C1 and the primary of transformer T1 form a
parallel resonant circuit for the IF signal that is coupled through the transformer
to the base circuit of slope detector Q1. Capacitor C2 and coil L1 form a parallel
resonant circuit for a frequency slightly higher than the maximum frequency
deviation of the IF signal.
Resistor R1 is the base-emitter bias resistor, and
resistor R3 is a voltage-dropping resistor.
Resistor R2 is the emitter-swamping
resistor, and capacitors C3 and C4 are bypass capacitors for the IF signal.
Transformer T2 is an output coupling transformer for slope detector Q1. Diode CR1
is the AM detector, resistor R4 is a load resistor, and coil L2 is a filter.
LESSON EXERCISES
In each of the following exercises, select the ONE answer that BEST completes the
statement or answers the question. Indicate your solution by circling the letter
opposite the correct answers in the subcourse booklet.
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