FILTER BLOCK
Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms.
Amp.
TA8248K
Filter Block
CPU
POWER AMPLIFIER (IC101: TA8248K)
The power amplifier is a
The following table shows the pin function of IC101.
Pin No. | Terminal | In/Out | Function |
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1 | NC | — | Not used |
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2 | B.S.2 | — | Terminal for a bootstrap capacitor |
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3 | OUT2 | Out | Channel 2 output |
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4 | VCC | In | +9 V source |
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5 | OUT1 | Out | Channel 1 output |
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6 | B.S.1 | — | Terminal for a bootstrap capacitor |
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7 | Power GND | In | Ground (0 V) source |
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8 | Stand by | In | Power control signal input. 0 V: Off, +9 V: On |
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9 | DC | — | Terminal for a decoupling capacitor |
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10 | NF1 | In | Negative feedback input |
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11 | IN1 | In | Channel 1 input |
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12 | IN2 | In | Channel 2 input |
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13 | NF2 | In | Negative feedback input |
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14, 15 | Pre GND | In | Ground (0 V) source |
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