| 摘要 |
Variable capacitive attenuation circuitry and associated methods are disclosed that may be implemented to employ a plurality of multi-purpose capacitors that may be selectably coupled together in different configurations to form a capacitive divider having different respective attenuation properties. In a particular embodiment, each of the capacitors of the disclosed capacitive attenuation circuitry may be selectably coupled to an RF reference as either a shunt capacitor or coupled in series between an RF signal input and an attenuated RF signal output as a series capacitor, thus forming a capacitive divider having selected attenuation properties. The disclosed variable capacitive attenuation circuitry may be advantageously utilized to attenuate an input RF signal and to provide a resulting attenuated RF output signal, for example, in the front end of RF receiver circuitry.
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