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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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FS9721_LP1 датащи(PDF) 33 Page - Fortune Semiconductor Corp. |
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FS9721_LP1 датащи(HTML) 33 Page - Fortune Semiconductor Corp. |
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33 / 41 page  FS9721_LP1 Rev. 2.0 34/41 Capacitance measurement is to charge/discharge to measuring capacitance through R22 to form a oscillation, then calculate the cycle of oscillation to get the capacitance value. To adjust R22 can calibrate the value in capacitance measurement. J4 and J6 are mode switches. When doing capacitance measurement, J4 and J6 are close. (In actual application, if the linearity is worse when doing 5.120nF measurement, you can take a consideration of paralleling a proximate 1000pF capacitance in input end of capacitance measurement during design. When doing the measurement, to press REL key and make the value be zero before measuring. The linearity of the smaller measurement in capacitance mode will be better.) 14.18 Frequency Measurement ADP SGND R18 10k R28 1M COM Hz FS9721_LP1 R30 100k J7 J9 PTC 1k C15 10uF Diagram 32 Frequency Measurement 14.19 Triode hFE Testing 16.5k 220k VDDA E C B R30 100K ADP Diagram 33 PNP-type Triode |
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