|IP명||A SAW-less Receiver Frontend Employing Switchable Mixer-Mode for Cellular Applications|
|실설계면적||5㎛ X 5㎛||공급 전압||1.2V|
|IP개요||In this paper, a surface acoustic wave (SAW)-less receiver (RX) front-end adopting switchable front-end architecture has been presented for 2G/3G/4G cellular applications. Depending on the RX-transmitter (TX) frequency separation, a favorable down-mixing architecture is selected between a current-sampling mixer and a voltage-sampling mixer. The proposed switchable architecture meets the specification of an input-referred second-order intercept point (IIP2) for the SAW-less RX while minimizing the power consumption. The implemented RX front-end consists of a
wideband capacitor cross-coupled common-gate low-noise amplifier, a 25% duty cycle passive mixer with IIP2 calibration circuitry, a baseband transconductor, and a trans-impedance amplifier. Simulated in a 180 nm CMOS process, the SAW-less RX frontend provides conversion gain of 42 dB, and achieves noise figure of below 3.3 dB, out-of-band input-referred third-order intercept point (IIP3) of -2 dBm, and IIP2 of more than 56 dBm. It draws an average current of 14.8 mA from 1.2 V.
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