First-generation cell phones were basic analog units, based on a scheme that Alexander Graham Bell would recognize.

第一代手机技术是基本模拟信号，是基于贝尔的理论。

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An analog maximum power point tracking (MPPT) controller integrated circuit (IC) based on open-circuit voltage method was proposed to enhance the photovoltaic conversion efficiency of solar cell.

为提高光伏电池的光电转换效率，设计一种基于开路电压法的光伏电池最大功率点跟踪(MPPT)控制芯片。

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Synthesis tools for several cell level CMOS analog circuits implemented with the above approach have been integrated in FDAADS—FuDan Analog Circuit Automated Design System.

利用上述方法实现的一些CMOS单元电路的自动综合模块已经集成到FDAADS——“复旦模拟电路自动化设计系统”中。

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Third, Globalstar phones have three modes: analog cell, digital cell (Qualcomm's CDMA) and satellite.

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The Japanese company, which is a big manufacturer of cell phones and infrastructure equipment such as base stations, once developed analog handsets for the North American market only to sell out of that business about 12 years ago.

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The current versions are not capable of exploiting the leading-edge cell-phone technology known as 3G, a high-speed offering that follows the original analog and second-generation digital systems.

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