STEP ATTENUATOR APPARATUS
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United States of America Patent
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N/A
Issued Date -
Dec 29, 2011
app pub date -
Jun 16, 2011
filing date -
Jun 29, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A step attenuator apparatus is provided, having an attenuation ratio which is switchable according to a control signal. Multiple variable attenuators are connected in series. Each variable attenuator includes a first terminal, a second terminal, multiple paths having different attenuation ratios, a first switch that can be connected to one end of a desired path selected from among the multiple paths, and a second switch that can be connected to the other end of a desired path selected from among the multiple paths. When a control signal is an instruction to set the step attenuator apparatus to a disconnected state, a control unit connects the first switch of the first-stage variable attenuator to one of the multiple paths, and connects the second switch of the first-stage variable attenuator to a different one of the multiple paths.
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