A bipolar IF device for GSM mobile telephone

Proceedings of the 1992 Bipolar/BiCMOS Circuits and Technology Meeting Pub Date : 1992-10-07 DOI:10.1109/BIPOL.1992.274083

K. Kwan, K. Marshall

引用次数: 0

Abstract

The authors describe an IF device used in a telephone handset for the European GSM cellular network. It carries out frequency down-conversion from 65.8 MHz to the 812.5-kHz baseband signal. It has a maximum system gain of 90 dB and a dynamic range of 56 dB. A system noise figure of 7-8 dB was achieved at maximum gain setting. Output was maintained within the midrange of analog-to-digital-converter (ADC) input levels by employing a digital baseband automatic gain control (AGC) technique.<>

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一种用于GSM移动电话的双极中频装置

作者描述了一种用于欧洲GSM蜂窝网络电话手持设备的中频设备。从65.8 MHz到812.5 khz基带信号进行频率下变频。它的最大系统增益为90 dB，动态范围为56 dB。在最大增益设置下，系统噪声系数为7-8 dB。通过采用数字基带自动增益控制(AGC)技术，输出保持在模数转换器(ADC)输入电平的中间范围内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the 1992 Bipolar/BiCMOS Circuits and Technology Meeting

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