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This paper presents a dual-channel GNSS receiver covering GPS and Beidou on a single chip in 0.13μm CMOS process. The receiver incorporates one reconfigurable RF front-end and two separate IF signal channels with one single fractional-N frequency synthesizer by using a ring voltage-controlled oscillator. This architecture supports an external active or passive antenna and provides the benefits of...
In whole system, the user usually only offers a voltage with noise as input logic voltage to digital receiver, to guarantee the right logic control, it requires that the IC chip must have a stable inversion level with logic high and logic low input voltage. For COMS process, in traditional design scheme, it usually uses a normal digital inverter as input-unit schematic, and changes the width or length...
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