Title :
Modeling of GMR linear isolator utilizing spin valves
Author :
Park, S. ; Jo, S.
Author_Institution :
Soongsil Univ., Seoul, South Korea
Abstract :
A linear isolator utilizing giant magnetoresistance spin valves is modeled and its linearity and response time are estimated by electrical circuit analysis. The calculated feedback coil current varies linearly from 0 mA to 16 mA when the input coil current is varied from 5 mA to 21 mA. Nonlinearity of less than ±0.5 mA is observed. As for the rectangular input current wave response, the rise and fall time of the output voltage level are 5 μs each, which are limited by the slew rate of the operational amplifier.
Keywords :
giant magnetoresistance; microwave isolators; network analysis; operational amplifiers; spin valves; 0 to 21 mA; 5 mus; GMR linear isolator; electrical circuit analysis; feedback coil current; giant magnetoresistance spin valves; operational amplifier; rectangular input current wave response; response time; slew rate; Circuit analysis; Coils; Delay; Feedback; Giant magnetoresistance; Isolators; Linearity; Operational amplifiers; Spin valves; Voltage;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464059
