A low-power, 1.57 GHz RF front-end for a Global Positioning System (GPS) receiver has been designed in a 1.0 /spl mu/m BiCMOS technology. It consists of a low noise amplifier with 15 dB of gain, a single balanced mixer with 6.3 mS of conversion g/sub m/, a Colpitts LC local oscillator, and an emitter coupled logic (ECL) divide-by-eight prescaler. This front-end has a single sideband (SSB) noise figure of 8.1 dB and is part of a triple conversion superheterodyne receiver whose IF frequencies are 179, 4.7, and 1.05 MHz. Low power consumption has been achieved, with 10.5 mA at 3 V supply voltage for the front-end, while the complete receiver is expected to draw about 12 mA.
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机译：用于全球定位系统（GPS）接收器的低功耗1.57 GHz射频前端已采用1.0 / spl mu / m BiCMOS技术进行了设计。它由一个增益为15 dB的低噪声放大器，一个具有6.3 mS转换g / sub m /的单平衡混频器，一个Colpitts LC本机振荡器和一个发射极耦合逻辑（ECL）除以八分频器组成。该前端的单边带（SSB）噪声系数为8.1 dB，并且是IF频率为179、4.7和1.05 MHz的三重转换超外差接收机的一部分。实现了低功耗，在前端为3 V供电电压时为10.5 mA，而整个接收器预计将消耗约12 mA的电流。
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