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We have developed ferroelectric capacitor fabrication technique and a new sensing amplifier circuit to realize low-voltage and high-density FRAM. Improvement of IrO, top electrode near the ferroelectric interface successively lowers operation voltage. And our developed “Dual Reference Sensing Amplifier” enables to commercialize highly-reliable FRAM with memory density of 4Mb or larger.
The state of polarization (SOP) is generally adjusted to optimize the signal-to-noise ratio of Brillouin measurement based on self-heterodyne detection. Although Brillouin Stokes power in silica fibers is known to be enhanced by optimizing the SOP, the role of SOP optimization in plastic optical fibers (POFs) is quite different from that in silica fibers. In this study, we experimentally clarify that...
Extended variable-length mode coding (EVLC), which dynamically creates code words for coding modes by taking account of the spatio-temporal correlations, is proposed. Experimental results show that EVLC achieves average bitrate reduction of 2.29% and a maximum bit-rate reduction of 6.84% compared to H.264/AVC with negligible increase in computational time.
The edge of the active area and termination structure have a decisive influence on the recovery safety operating area (SOA) of High Voltage (HV) freewheeling diodes (FWDs). We have investigated the HV planar anode diode that breaks the triangle trade-off limitations between the overall loss, the reverse recovery softness and the recovery SOA. Our results show the destruction phenomena during the recovery...
Monolithically integrated, wide tuning range low pass filters have been demonstrated based on electrothermally driven MEMS switches. The integrated system is comprised of copper spiral inductors, polysilicon capacitors and electrothermal MEMS actuators on a single 4.3 times 2.4 mm2 chip; the design is optimized for the selection of three commonly used commercial cut-off frequencies: (fc) at 0.9 GHz,...
A low-voltage signal conditioning circuit for a capacitive sensor was designed with 0.35 mum CMOS technology. A charge balanced capacitance detection circuit and summing amplifier were designed with inverter amplifier, feedback resistance and capacitance which determines the gain and frequency response of the circuit. The oscillator and hold capacitance were also integrated in the chip size of 1 mm...
In this paper, we use mica for clay and report on a finding of very large remanent polarization in the PVDF/mica nanocomposites prepared by melt crystallization and solvent casting.
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