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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP6V96UT-E/MS датащи(PDF) 25 Page - Microchip Technology |
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MCP6V96UT-E/MS датащи(HTML) 25 Page - Microchip Technology |
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25 / 52 page  2020 Microchip Technology Inc. DS20006467A-page 25 MCP6V96/6U/7/9 4.4.3 OFFSET VOLTAGE CORRECTION Figure 4-13 shows MCP6V96 (U2) correcting the input offset voltage of another op amp (U1). R2 and C2 integrate the offset error seen at U1’s input. The integration needs to be slow enough to be stable (with the feedback provided by R1 and R3). R4 and R5 attenuate the integrator’s output. This shifts the integrator pole down in frequency. FIGURE 4-13: Offset Correction. 4.4.4 PRECISION COMPARATOR Use high gain before a comparator to improve the latter’s performance. Do not use MCP6V96/6U/7/9 as a comparator by itself; the VOS correction circuitry does not operate properly without a feedback loop. FIGURE 4-14: Precision Comparator. U1 MCP6XXX C2 R2 R1 R3 VDD/2 R4 VIN VOUT R2 VDD/2 R5 U2 MCP6V96 + - + - VIN R3 R2 VDD/2 VOUT R5 R4 R1 U1 MCP6V96 U2 MCP6541 + - + - |
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