LIN Hong-bo, DONG Hai-feng, ZHUO Chao, et al. Design of a current source for unshielded atomic magnetometer based on SERF regime[J]. 2012, 31(12): 83-86.
LIN Hong-bo, DONG Hai-feng, ZHUO Chao, et al. Design of a current source for unshielded atomic magnetometer based on SERF regime[J]. 2012, 31(12): 83-86. DOI: 10.13873/j.1000-97872012.12.036.
A current source is proposed for unshielded atomic magnetometer based on spin-exchange relaxation free(SERF)regime.It uses operational amplifier and MOSFET to construct basic V/I change-over circuit
and high-performance components is used to reduce the ripple of output current
then stablizes the circuit by frequency compensation method.The test results show that the current source output range 0
5
00 mA
and the ripple current is less than 30.5 μA when the load is invariable
the stability of corresponding magnetic field is prior to 10 nT
which meets the requirements of SERF regime atomic magnetometer for unshielded applications.