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HY-2 satellite, the first ocean dynamic satellite of China, was launched in August 2011, carrying a dual frequency (Ku band and C band) altimeter, to measure the global mean sea level [1]. To provide truly sea level measurements, in-orbit calibration is essential. This paper concerns the transponder in-orbit calibration method. A signal reconstructive transponder for HY-2 altimeter in-orbit calibration...
To avoid to be damaged when class D power amplifier chip load is short circuit, the paper presents a self-recovering over current protection circuit in chip. The over current protection circuit would active used to shut down the output buffer when two output pins short-circuit to power supply, short-circuit to ground or short-circuit to each other. Different from previously reported scheme, the scheme...
The paper presents the design and implementation of input/output interface circuits, fully compatible with low-voltage differential signal (LVDS) standard. Due to the low voltage differential transmission technique, the low power consumption and high transmission speed are achieved at the same time. The transmitter is implemented by a closed-loop control circuit and an internal bandgap voltage reference,...
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