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 (V_SS) 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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