Invention Grant
US07649407B2 Digitally tuned, integrated RF filters with enhanced linearity for multi-band radio applications 失效
数字调谐的集成RF滤波器,具有增强的线性度,适用于多频段无线电应用

Digitally tuned, integrated RF filters with enhanced linearity for multi-band radio applications
Abstract:
An integrated, multi-band radio frequency (RF) filter is capable of modifying a filter response thereof in response to control information. Switching elements within the filter can be changed between on and off conditions to modify the filter response. In one implementation, the integrated, multi-band filter is integrated on a front end module chip to be used within a multi-radio wireless device. In at least one embodiment, linearity enhancement circuitry is provided within a multi-band filter to improve linearity and reduce insertion loss.
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