| FIGURE 6 |
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| Fig 6—A differential, four-pole, lowpass Butterworth filter removes the 250-kHz carrier from the square-wave output and delivers the amplified audio to the speaker. |
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| FIGURE 6 |
|
| Fig 6—A differential, four-pole, lowpass Butterworth filter removes the 250-kHz carrier from the square-wave output and delivers the amplified audio to the speaker. |
back |