BCCP：Bump chip carrier package CAD：Computer aided design CP：Charge pump DCN：Document control number GPS：Global positioning system LNA：Low noise amplifier mil：0.001 inch (0.0254 mm) MSM⑩：Mobile Station Modem⑩ PA：Power amplifier PCB：Printed circuit board PLL：Phase-locked loop PM：Power management QCT：QUALCOMM CDMA Technologies Division QFN：Quad flat no-lead package RFL：Radio frequency LNA RFR：Radio frequency receiver RFT：Radio frequency transmitter SBI：Serial bus interface VCO：Voltage-controlled oscillator VCTCXO：Voltage-controlled temperature-compensated crystal oscillator. Referred to as TCXO in this document. Zero-IF：A radio architecture that converts received signals directly from RF to baseband, thereby eliminating the intermediate frequency necessary in super-heterodyne receivers. The transmit signals likewise eliminate the Tx IF, upconverting directly from baseband to RF. ZIF：Zero-IF