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A fully integrated supply voltage and temperature variation-tolerant relaxation oscillator for biomedical systems has been presented. Concepts of dynamic threshold and switched resistors are proposed to improve the frequency stability against power supply and temperature variations, respectively. This design was verified in a 0.35-$\mu{\rm m}$ standard CMOS process with a 3 V supply. Measurement...
Based on the principle of piecewise compensation, a new high-order curvature compensated method of bandgap reference is presented in this paper. This method focuses on forming multiple local extrema of the curve of reference voltage instead of single valley or peak in the entire operating temperature range, which improves the temperature independence significantly. It has a temperature coefficient...
For monolithic RF spiral inductor on high-loss silicon substrate, a novel physical model is proposed, in which functions of skin effect, proximity effect and eddy current losses in the substrate to frequency-dependent series parameters Ls and Rs are accounted in the light of modified partial equivalent element circuit methodology and a full- coupled transformer loop and, in the meanwhile, distributed...
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