Sony CRF-150 Service Manual page 7

if stage‫‏‬ ‫أس‬
чае
у ESE
Fig. 1:3 Block diagram of the sw front end
carrier from the last stage of the
if amplifier adds a negative арс
voltage on the positively-biased
base of transistor Q202 through
diode D302 as shown in Fig. 1-4.
озо!
В 0
m
Me,
mal
6
ome
07
gal
d
Fig. 1-5
Output waveform of the age
ud
M Strip
higher than incoming signal)
applied to its emitter for conver
sion to the 1.55 — 2.25 MHz Ist
Fig. 1-4 Diagram of the age
Аз the signal becomes stronger, Е
the age level becomes higher SW tst м 0303 amplifies three am sig-
the signal is small, 0202 0303
increases the gain of rf amplifier
automatically.