Compensated programmable RF attenuator
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United States of America Patent
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Jun 25, 2019
Grant Date -
Jan 12, 2017
app pub date -
Jul 11, 2016
filing date -
Jul 10, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A programmable RF attenuator having a first connection node and a second connection node is disclosed. The programmable RF attenuator provides RF attenuation between the first connection node and the second connection node based on at least a first attenuation control signal. The programmable RF attenuator includes a first RF attenuator circuit and a first reactance compensation circuit, such that the first RF attenuator circuit includes a first shunt transistor element and a first shunt resistive element, which is coupled to the first shunt transistor element. The first shunt transistor element receives the first attenuation control signal. The first reactance compensation circuit is coupled to the first RF attenuator circuit and at least partially compensates for reactive characteristics of the programmable RF attenuator that affect an attenuation flatness of the programmable RF attenuator.
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