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This paper is concerned with the design of a high speed current steering DAC. Techniques to improve static precision are preserved while their negative influences on dynamic performance are suppressed. The prototype is implemented with the SMIC 0.13 ??m process. With an update rate of 700 Msamples/s, measurements show that the DAC achieves over 40 dB SFDR under a sampling rate of 700 Ms/s and consumes...
In the paper, a new field ground fault protection with voltage injection is introduced. The injection voltage of protection is a low frequency square wave voltage, it is transformed from an AC voltage by transformer, rectifier and electronic switches, and its frequency is controllable. The principle, criterion and hardware configuration of protection are given, and several operation problems are analyzed...
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