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L9779WD 数据表(PDF) 101 Page - STMicroelectronics |
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L9779WD 数据表(HTML) 101 Page - STMicroelectronics |
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101 / 170 page  DocID027452 Rev 5 101/170 L9779WD Functional description 169 6.16.2 Auto-adaptative sensor filter Two main VRS configuration sets are available for VRS, by means of CONFIG_REG1 register bit 1: fully adaptive VRS mode and limited adaptive VRS mode (default: 0). For VRS configurations in both limited and fully adaptive mode, CONFIG_REG5 is used. Auto-adaptative hysteresis (fully adaptive mode) When enabled the auto adaptative hysteresis works as described below. Input signals difference is obtained through a full differential amplifier; its output, DV signal, is fed to peak detection circuit and then to A/D converter implemented with 4 voltage comparators (5 levels) (Pvi). Output of A/D is sent to Logic block (Table 45: Hysteresis threshold precision) that implements correlation function between Peak voltage and hysteresis value; hysteresis value is used by square filtering circuit which conditions DV signal. Figure 63. Auto adaptative hysteresis diagram |
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