l1波段C/ a码GPS射频前端芯片的设计与实现

Jong-Moon Kim, Ho-Jun Song, Young-Back Kim
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引用次数: 4

摘要

本文介绍了一种l1波段C/ a码GPS射频前端芯片的设计与实现。该芯片包含一个低噪声射频前置放大器、一个带传统压控振荡器的频率合成器、一个可变增益放大器和一个模数转换器。唯一的外部要求是一个温度补偿的晶体振荡器,一个两极LC滤波器,一个可变容差调谐LC槽电路,用于调谐压控振荡器的频率,以及用于锁相环滤波器的标准无源元件,阻抗匹配和电源去耦。该芯片已在0.8-/spl mu/m的BiCMOS工艺中实现。芯片尺寸和工作电流分别为9 mm/sup /和42 mA,电压为3.3 V。
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Design and implementation of L1-band C/A-code GPS RF front-end chip
This paper describes the design and implementation of an L1-band C/A-code GPS RF front-end chip. The chip incorporates a low-noise RF preamplifier, a frequency synthesizer with a conventional voltage-controlled oscillator, a variable gain amplifier, and an analog-to-digital converter. The only external requirements are a temperature compensated crystal oscillator, a two-pole LC filter, a varactor-tuned LC tank circuit for tuning the frequency of the VCO, and standard passive components for the PLL loop filter, the impedance matching and the power supply decoupling. The chip has been implemented in a 0.8-/spl mu/m BiCMOS process. The chip size and operating current are 9 mm/sup 2/ and 42 mA at 3.3 V, respectively.
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