Apparatus and methods for digital step attenuation

Apparatus and methods for digital step attenuators are provided herein. In certain configurations, a DSA includes a plurality of DSA stages that can be set in an attenuation mode or in a bypass mode using a plurality of switching circuits. A first switching circuit of the plurality of switching circ...

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Bibliographic Details
Main Authors Choi, Yunyoung, Agarwal, Bipul, Cho, Joshua Haeseok
Format Patent
LanguageEnglish
Published 21.08.2018
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
TELEPHONIC COMMUNICATION
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Summary:Apparatus and methods for digital step attenuators are provided herein. In certain configurations, a DSA includes a plurality of DSA stages that can be set in an attenuation mode or in a bypass mode using a plurality of switching circuits. A first switching circuit of the plurality of switching circuits includes a field effect transistor (FET) switch, a gate resistor, one or more gate resistor bypass switches, and a pulse generation circuit. The gate resistor is electrically connected between a switch control input and a gate of the FET switch, and a switch control signal can be provided to the switch control input to turn on or off the FET switch. In response to detecting a rising and/or falling edge of the switch control signal, the pulse generation circuit can control the one or more gate resistor bypass switches to bypass the gate resistor.
Bibliography:Application Number: US201715678967