New Electron-Doped Superconducting Cuprate Li_x_Sr_2_CuO_2_Br_2_

A new electron-doped superconductor Li_x_Sr_2_CuO_2_Br_2_ with x = 0.15 has successfully been synthesized by an electrochemical Li-intercalation technique. The magnetic susceptibility shows superconductivity of bulk with the superconducting transition temperature Tc = 8 K. This compound is the first electron-doped superconducting cuprate with the K_2_NiF_4_ structure.Comment: 9pages, 3figures, accepted for publication in Jpn. J. Appl. Phy

Temes, “A noise-shaping accelerometer interface circuit for two-chip implementation

Abstract {Aproposed third-order noise-shaping accelerometer interface circuit enhances the SNR, compared with the previously presented interface circuits. The solution for the twochip implementation is described and a novel cross-coupled CDS integrator is proposed. This scheme functions even with the large parasitic capacitances between the sensor and the interface circuit. The op-amp noise is rst-order shaped. Dithering circuit is also implemented on the chip, fabricated in AMI 1.6 mCMOSprocess

Area-Efficient Decimation Filter with 50/60Hz Power-Line Noise Suppression for ΔΣ A/D Converters

This paper introduces a new digital filter utilizing a SINC filter used in ΔΣ A/D converters and featuring 50/60Hz power-line noise rejection. Compared with a simple series connection of the SINC filter and a noise suppression filter for the power-line, this digital filter reduces the number of gates by approximately 40% and enables the attenuation of 50Hz and 60Hz elements by approximately 55dB

Temes, “A noise-shaping accelerometer interface circuit for two-chip implementation

This paper introduces a new architecture for sensor interface circuits using a delta-sigma modulator. The three-level force feedback allows the use of a digital compensator to stabilize the loop. A 3rd-order delta-sigma structure shapes the opamp noise and allows two-chip implementation with high loop gain at low frequencies. 1