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在精密仪用放大器INA115上增加开关或多路器设计可编程增益
消耗积分:3 |
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2009-06-06
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The INA115 is a precision instrumentation amplifier (IA).
Its gain-sense and amplifier output connections are available
so that gains can be accurately set using external resistors.
By adding switches or a multiplexer, you can make a
precision programmable-gain IA (PGIA). Using the circuit
topology shown in this bulletin, the switches are in series
with op amp inputs so their resistance does not add error.
Its gain-sense and amplifier output connections are available
so that gains can be accurately set using external resistors.
By adding switches or a multiplexer, you can make a
precision programmable-gain IA (PGIA). Using the circuit
topology shown in this bulletin, the switches are in series
with op amp inputs so their resistance does not add error.
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