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MCP6L1RT Folha de dados(PDF) 13 Page - Microchip Technology

Nome de Peças MCP6L1RT
Descrição Electrónicos  2.8 MHz, 200 關A Op Amps
PDF  32 Pages
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP6L1RT Folha de dados(HTML) 13 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS22135A-page 13
MCP6L1/1R/2/4
4.7
Application Circuits
4.7.1
ACTIVE LOW-PASS FILTER
Figure 4-6 shows a second-order Butterworth filter,
with a 10 Hz cutoff frequency and a gain of +1 V/V,
using a Sallen Key topology. Microchip’s FilterLab®
software designed the filter, then the capacitors were
reduced in value (using the same program).
FIGURE 4-6:
Sallen Key Topology.
Figure 4-7 shows a filter with the same requirements,
except the gain is -1 V/V, in a Multiple Feedback topol-
ogy. It was designed in a similar fashion using Filter-
Lab®.
FIGURE 4-7:
Multiple Feedback Topology.
R1
VIN
VOUT
R2
18.2 k
Ω 29.4 kΩ
MCP6L1
C2
470 nF
C1
1.0 µF
R1
VIN
VOUT
R3
54.9 k
Ω
25.5 k
Ω
MCP6L1
C2
820 nF
C1
220 nF
VDD/2
R2
25.5 k
Ω



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