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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TS4990IDT датащи(PDF) 19 Page - STMicroelectronics |
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TS4990IDT датащи(HTML) 19 Page - STMicroelectronics |
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19 / 33 page  DocID9309 Rev 14 19/33 TS4990 Application information 33 The graph in Figure 60 shows an example of Cin and Cfeed influence. Figure 60. Frequency response gain vs. Cin and Cfeed 4.4 Power dissipation and efficiency Hypotheses: Load voltage and current are sinusoidal (Vout and Iout). Supply voltage is a pure DC source (VCC). The load can be expressed as: and and Therefore, the average current delivered by the supply voltage is: The power delivered by the supply voltage is: 10 100 1000 10000 -25 -20 -15 -10 -5 0 5 10 Rin = Rfeed = 22k Ω Tamb = 25 °C Cfeed = 2.2nF Cfeed = 680pF Cfeed = 330pF Cin = 470nF Cin = 82nF Cin = 22nF Frequency (Hz) V out = VPEAK sin t (V) I out = V out R L ------------- (A) P out = V PEAK 2 2R L ------------------------- (W) I CC AVG = 2 V PEAK R L ---------------------- (A) P supply V CC I CC AVG (W) = |
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