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模数转换器接地技术对系统性能的影响
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2009-06-12
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Obtaining optimum performance from a high-resolution
analog-to-digital converter (ADC) depends upon many factors.
Power supply decoupling and good grounding practices
are essential to maintaining accuracy in ADCs.
Poor grounding technique may manifest itself in many
different ways such as excessive noise, or signal crosstalk in
the system. A more difficult problem to track down is that of
poor differential linearity error (DLE) in the converter. This
is difficult because poor DLE may result from settling time
problems inside the ADC, from the circuitry driving the
ADC having too high an output impedance at the converter’s
operating frequency, from poor grounding techniques or
other sources.
analog-to-digital converter (ADC) depends upon many factors.
Power supply decoupling and good grounding practices
are essential to maintaining accuracy in ADCs.
Poor grounding technique may manifest itself in many
different ways such as excessive noise, or signal crosstalk in
the system. A more difficult problem to track down is that of
poor differential linearity error (DLE) in the converter. This
is difficult because poor DLE may result from settling time
problems inside the ADC, from the circuitry driving the
ADC having too high an output impedance at the converter’s
operating frequency, from poor grounding techniques or
other sources.
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