Recently, Quick-Scanning Extended X-ray Absorption Fine Structure Spectroscopy (QEXAFS) has become an important tool for in-situ characterization of materials and measurement of associated electronic structure for where samples have a short life due to X-ray damage. In this case, the time response of the ionization chamber affects the measurement resolution and therefore overall performance of ...

Since the introduction of monolithic IC amplifiers there has been a continual improvement in DC accuracy. Bias currents have been decreased by 5 orders of magnitude over the past 5 years. Low offset voltage drift is also necessary in a high accuracy circuits. This is evidenced by the popularity of low drift amplifier types as well as the requests for selected low-drift op amps. However, until n...

The active hybrid pixel detector (APD) can be a valuable solution in front-end electronics for radiation sensors. Detection systems with high sensor pixilation can benefit from low power, low parasitic, high front-end channel density, and low cost per channel. In addition, the APDs are characterized by good radiation tolerance [1-3] and can integrate large amount of additional signal processing...

An optical phase locking method based on direct control is proposed. The core of this to synchronize the carrier by directly changing local beam. corresponding experimental device and supporting algorithm were configured verify feasibility method. Phase can be completed without cycle skipping, acquisition time 530 ns. Without an preamplifier, a sensitivity -34.4 dBm obtained, bit error rate 10-...

The voltage biased SQUID Bootstrap Circuit (SBC) was recently demonstrated for direct readout of SQUID signals. The SBC combines currentand voltage-feedbacks in one circuit to suppress the preamplifier noise. It offers not only a good noise performance, but also wide tolerance of SQUID parameters. Using SBC gradiometer, the bio-magnetic signals were successfully measured. In this paper, we over...