发明授权
US08149955B2 Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop 有权
单端多波段反馈线性化RF放大器和混频器,具有直流偏移和IM2抑制反馈回路

Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop
摘要:
A receiver arrangement includes a single ended multiband feedback amplifier, at least one single ended input, differential output mixer arrangement including a main mixer and a trim mixer, and a mixer feedback loop circuit configured to receive differential output signals generated by the mixer arrangement. The mixer feedback loop circuit generates a feedback signal based on the received differential output signals and provides the feedback signal to the mixer arrangement to minimize DC-offset and second order intermodulation products. The single ended multiband feedback amplifier may include an input stage and a programmable resonance tank circuit connected to the input stage for suppressing downconverted noise from harmonics of the LO-frequency, and a configurable feedback net that shapes the frequency response of a feedback loop including the feedback net based on a band operation of the single ended multiband feedback amplifier.
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