Audio amplifier for portable radio receiver
Audio amplifier for portable radio receiver
This is a simple audio amplifier circuit fabricated around BEL1895 1W audio amplifier IC. This circuit is alternative of the complicated audio amplifier circuit for portable radio receiver. No driver circuit for loudspeaker is needed with the facilities of wide range of supply voltage (VSS) 3V to 10 V. The feature like to obtain high sensitivity and good S/N ratio in AM receiver makes this audio amplifier for portable radio receiver versatile.
PARTS LIST
Resistors (all ¼-watt, ± 5% Carbon)
R1 = 390 Ω
R2 = 100 KΩ
R3 = 1 Ω
R4 = 56 Ω
Capacitors
C1, C6 = 0.1 µF
C2, C8 = 470 µF/6.3 V
C3 = 100 µF/6.3V
C4 = 10 µF/6.3V
C5 = 330 pF
C7 = 220 µF/6.3 V
Semiconductor
IC1 = BEL1895
Miscellaneous
LS1 = 4 Ω speaker
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