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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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41594B датащи(PDF) 149 Page - Microchip Technology |
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41594B датащи(HTML) 149 Page - Microchip Technology |
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149 / 372 page  2011-2012 Microchip Technology Inc. Preliminary DS41594B-page 149 PIC12LF1840T48A 19.0 COMPARATOR MODULE Comparators are used to interface analog circuits to a digital circuit by comparing two analog voltages and providing a digital indication of their relative magnitudes. Comparators are very useful mixed signal building blocks because they provide analog functionality independent of program execution. The analog comparator module includes the following features: • Independent comparator control • Programmable input selection • Comparator output is available internally/externally • Programmable output polarity • Interrupt-on-change • Wake-up from Sleep • Programmable Speed/Power optimization •PWM shutdown • Programmable and fixed voltage reference 19.1 Comparator Overview A single comparator is shown in Figure 19-1 along with the relationship between the analog input levels and the digital output. When the analog voltage at VIN+ is less than the analog voltage at VIN-, the output of the comparator is a digital low level. When the analog voltage at VIN+ is greater than the analog voltage at VIN-, the output of the comparator is a digital high level. FIGURE 19-1: SINGLE COMPARATOR – + VIN+ VIN- Output Output VIN+ VIN- Note: The black areas of the output of the comparator represents the uncertainty due to input offsets and response time. |
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