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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4650 датащи(PDF) 25 Page - STMicroelectronics |
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AN4650 датащи(HTML) 25 Page - STMicroelectronics |
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25 / 102 page  DocID027415 Rev 1 25/102 AN4650 Operating modes 102 2.7 Gyroscope bandwidth The gyroscope sampling chain is represented by a cascade of four blocks: analog low-pass anti-aliasing filter, ADC converter, digital low-pass filter and a selectable high-pass filter (Figure 4). Figure 4. Gyroscope sampling chain diagram The analog signal coming from the mechanical parts is filtered by a low-pass anti-aliasing filter (having a constant bandwidth) before being converted by the ADC. The digital signal is then filtered by a low-pass digital filter whose cutoff frequency depends on the selected gyroscope ODR: the cutoff values in Low-Power and Normal mode are shown in Table 13; the cutoff values related to High-Performance mode are indicated in Table 14. Table 13. Gyroscope digital low-pass filter cutoff in Low-Power / Normal mode Gyroscope ODR [Hz] Cutoff [Hz] 13 Hz (Low Power) 3.9 26 Hz (Low Power) 7.9 52 Hz (Low Power) 15.8 104 Hz (Normal mode) 31.4 208 Hz (Normal mode) 60.2 Table 14. Gyroscope digital low-pass filter cutoff in High-Performance mode Gyroscope ODR [Hz] Cutoff [Hz] 13 Hz (High Perf.) 4.2 26 Hz (High Perf.) 8.3 52 Hz (High Perf.) 16.6 104 Hz (High Perf.) 33.4 208 Hz (High Perf.) 66.7 416 Hz (High Perf.) 135.9 833 Hz (High Perf.) 295.4 1.66 kHz (High Perf.) 1057.0 |
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