AN1042D中文資料安森美半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書
AN1042D規(guī)格書詳情
High Fidelity Switching Audio Amplifiers Using TMOS Power MOSFETs
Almost all switching amplifiers operate by generating a high frequency square wave of variable duty cycle. This square wave can be generated much more efficiently than an analog waveform. By varying the duty cycle from 0 to 100, a net dc component is created that ranges between the negative and positive supply voltages. A low pass filter delivers this dc component to the speaker. The square wave must be generated at a frequency well above the range of hearing in order to be able to cover the full audio spectrum from dc to 20 kHz. Figure 1 shows a square wave generating a sine wave of one–ninth its frequency as its duty cycle is varied.
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|---|---|---|---|---|---|---|---|
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35830 |
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23+ |
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248910 |
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98215 |
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100500 |
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A |
24+ |
b |
14 |
詢價(jià) | |||
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24+ |
NA |
18000 |
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21+ |
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10 |
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2023+ |
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8700 |
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詢價(jià) | ||
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589220 |
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22+ |
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8200 |
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詢價(jià) |
