Sameet Ramakrishnan, Lucas Calderin, A. Puglielli, E. Alon, A. Niknejad, B. Nikolić
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引用次数: 13
Abstract
This paper presents an active transmitter (TX) cancellation scheme for FDD that synthesizes a replica of the TX current in shunt with the receiver (RX), virtually shorting out the TX signal for the RX while having minimal impact on TX insertion loss. The prototype in 65nm CMOS demonstrates >50dB cancellation of a +12.6dBm peak 20MHz modulated TX signal. A receiver integrated on the same prototype is able to down-convert the RX signal at 40MHz offset with <;4.3dB noise figure (NF) degradation in the presence of the residual TX.
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