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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2583 датащи(PDF) 11 Page - STMicroelectronics |
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AN2583 датащи(HTML) 11 Page - STMicroelectronics |
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11 / 18 page  AN2583 Audio characteristics 11/18 2.2.4 Bridged amplifiers A bridged amplifier uses two identical amplifiers driven 180° out of phase. The circuit shown in Figure 12 uses two single supply amplifiers, AX. These would each be comparable to the amplifier of Figure 7. The input signal is connected unchanged to the left amplifier and inverted prior to going to the right amplifier thus making the right one 180° out of phase with the left. The outputs of the two amps, VL+ and VL–, are each biased at VDD/2. Thus, the quiescent difference between them is 0 V. Therefore, no DC blocking capacitor is required at the load. Figure 12. Bridged amplifiers Each output can swing between VDD and ground as shown in Figure 13. Figure 13. Outputs of bridged amplifier VIN RL VDD VL + – VL+ VL– Ax VDD Ax ai13938 0 VDD / 2 VL– VDD VL+ 0 VDD VL VL-PK VDD ai13939 |
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