title: A low noise modular current source for stable magnetic field control.
abstract: A low cost, stable, programmable, unipolar current source is described. The circuit is designed in view of a modular arrangement, suitable for applications where several DC sources must be controlled at once. A hybrid switching/linear design helps in improving the stability and in reducing the power dissipation and cross-talking. Multiple units can be supplied by a single DC power supply, while allowing for a variety of maximal current values and compliance voltages at the outputs. The circuit is analogically controlled by a unipolar voltage, enabling current programmability and control through commercial digital-to-analogue conversion cards.
authors.affiliation: DIISM University of Siena, CNISM, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Valerio
authors.identifier: 0000000216425391
authors.initials: V
authors.lastname: Biancalana
authors.affiliation: DIISM University of Siena, CNISM, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Bevilacqua
authors.affiliation: DIISM University of Siena, CNISM, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Piero
authors.initials: P
authors.lastname: Chessa
authors.affiliation: DSFTA University of Siena, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Yordanka
authors.initials: Y
authors.lastname: Dancheva
authors.affiliation: DSFTA University of Siena, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Cecchi
authors.affiliation: DSFTA University of Siena, Via Roma, 56, 53100 Siena, Italy.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Stiaccini