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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SE33 датащи(PDF) 179 Page - Microchip Technology |
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SE33 датащи(HTML) 179 Page - Microchip Technology |
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179 / 478 page  2010-2012 Microchip Technology Inc. DS41414D-page 179 PIC16(L)F1946/47 18.0 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 18.1 Comparator Overview A single comparator is shown in Figure 18-1 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. The comparators available for this device are located in Table 18-1. FIGURE 18-1: SINGLE COMPARATOR TABLE 18-1: COMPARATOR AVAILABILITY PER DEVICE Device PIC16(L)F1946 ●●● PIC16(L)F1947 ●●● – + 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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