Evaluation of input circuit parameters of automatic compensators

1967 ◽  
Vol 10 (12) ◽  
pp. 1484-1487
Author(s):  
V. N. Stysis
Keyword(s):  
Input Circuit

General purpose rail-to-rail input circuit with constant behaviour for VLSI cell libraries

2002 ◽  
Vol 38 (25) ◽  
pp. 1615 ◽  
Author(s):  
J.M. Carrillo ◽  
G. Torelli ◽  
J.F. Duque-Carrillo ◽  
J.L. Ausín
Keyword(s):  
General Purpose ◽  
Input Circuit ◽  
Rail To Rail

Room Temperature Sample Scanning SQUID Microscope for Imaging the Magnetic Fields of Geological Specimens

2013 ◽  
Vol 475-476 ◽  
pp. 3-6 ◽  
Author(s):  
Qing Meng Wang ◽  
Hua Feng Qin ◽  
Qing Song Liu ◽  
Tao Song
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Magnetic Fields ◽  
Liquid Helium ◽  
Quantum Interference ◽  
Three Dimensional ◽  
Input Circuit ◽  
Pickup Coil ◽  
Weak Magnetic Fields ◽  
Scanning Squid

A microscope to image weak magnetic fields using a low-temperature superconducting quantum interference device (SQUID) had developed with a liquid helium consumption rate of ~0.5L/hour. The gradient pickup coil is made by a low-temperature superconducting niobium wire with a diameter of 66 μm, which is coupled to the input circuit of the SQUID and is then enwound on the sapphire bobbin. Both of the pickup coil and the SQUID sensor are installed in a red copper cold finger, which is thermally anchored to the liquid helium evaporation platform in the vacuum space of the cryostat. To reduce the distance between the pickup coil and sample, a 100 μm thick sapphire window is nestled up to the bottom of the cryostat. A three-dimensional scanning stage platform with a 50 cm Teflon sample rack under the sapphire window had the precision of 10 μm. To test the fidelity of the new facility, the distribution of the magnetic field of basalt slice specimens was determined. Results show that the spatial resolution of the newly-designed facility is 500 μm with a gradient magnetic field sensitivity of 380fT. This opens new opportunities in examining the distribution of magnetic assemblages in samples, which bear great geological and geophysical information.

Design of Detection System for Residual Voltage Based on SOPC

2012 ◽  
Vol 241-244 ◽  
pp. 180-185
Author(s):  
Wu Zhu ◽  
Yong Wang ◽  
Chao Jiang ◽  
Jia Min Zhu
Keyword(s):  
High Speed ◽  
Detection System ◽  
Electrical Equipment ◽  
Experimental Result ◽  
Input Circuit ◽  
Measuring Instrument ◽  
Residual Voltage ◽  
Zero Crossing ◽  
Synchronization Signal ◽  
Power Frequency

In accordance with the relevant safety standard requirements for electrical equipment, this thesis proposes a residual voltage detection method with high accuracy and low power consumption . The power frequency synchronization signal is obtained by the measuring instrument with the zero-crossing detection circuit used. In the power frequency AC peak moment the measured instrument's power is cut off and the measured equipment's residual voltage is sampled by the input circuit with the high input impedance. Under the control of the NIOSII, the on-line detection of power-down residual voltage of equipment after the 1second and 10seconds is realized with the high speed sampling /hold-circuit and high precision ADC module used. The experimental result shows that the measuring instrument has good stability, with measurement accuracy up to 0.506%, meeting the measurement requirements.

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