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Using fiber based frequency dissemination system, we are building Beijing regional time and frequency network. Currently, Tsinghua University (THU), the Changping site of National Institute of Metrology (NIM-Changping) and Beijing Institute of Radio Measurement (BIRM) have been linked and synchronized via the fiber network. The frequency signals of three hydrogen masers, two placed in NIM, one in...
As the first step of Beijing regional time and frequency network, Currently, Tsinghua University (THU) and the Changping site of National Institute of Metrology (NIM-Changping) have been linked and synchronized via the fiber network. The frequency stability of the hydrogen maser in NIM and the ultra-stable crystal oscillator steered by a cesium atomic clock in THU was measured. More atomic clocks...
This paper reports a 45 nm spin-transfer-torque (STT) MRAM embedded into a standard CMOS logic platform that employs low-power (LP) transistors and Cu/low-k BEOL. We believe that this is the first-ever demonstration of embedded STT MRAM that is fully compatible with the 45 nm logic technology. To ensure the switching margin, a novel "reverse-connection" 1T/1MT cell has been developed with...
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