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An energy-efficient self-charged crystal oscillator (SCXO) employing a quadrature-phase shifter is proposed to provide wide-range pulse injection timing for power consumption reduction. The passive resistors of quadrature-phase shifter can be shared by the startup circuit to save area consumption. The double-edge extractor and the low-power comparator are added to reduce the power consumption. The...
A radiation hardened monolithic DC-DC boost converter is presented in this paper. The RHBD (Radiation-Hardening by Design) techniques applied to Radiation Hardened DC-DC Boost Converter, which has been fabricated with a standard commercial 0.35-μm CMOS process. Both circuit and device-level RHBD techniques are employed to improve the radiation tolerant abilities. All power switches, feedback control...
A Chaotic Optimization Algorithm (COA) is applied to integrated AC/DC hybrid power system in which the multi-infeed DC power transmission system is included, and the research on coordination controls among the HVDC modulations has been investigated in this paper. Chaotic Optimization Algorithms, which have the features of easy implementation, short execution time and robust mechanisms of escaping...
The positron emission tomography (PET) image quality can be degraded due to motion. In this paper, we present a new data-driven method for oscillation motion compensation that utilizes the geometric sensitivity feature of a 3D-PET scanner system operating in list event acquisition mode. The count rate from a given organ will depend on the axial location of the organ due to the geometric sensitivity...
A dynamical model for the p53-Mdm2 feedback loop regulated by Akt is reported in this work. By computational simulation, it reproduces the stable oscillatory pulses in p53- Mdm2 negative feedback loop which is functionally responsible for cell repair or apoptosis in individual cell. With the survival stress, in the tumor suppressor-oncoproteins networks, the model indicates the potential to exhibit...
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