EEVblog #579 - Precision Low Current Source

Part 3 in the Precision Current Source series. Dave breadboards a classic precision low current source circuit using the 10V REF102 voltage reference to generate accurate 1mA and 1uA currents. Also some talk about the errors in a typical precision circuit like this. Part 2: http://www.youtube.com/watch?v=O2ohz8DyJoQ Part 1: http://www.youtube.com/watch?v=pXMhpEi_wPU REF102: http://www.ti.com/lit/ds/sbvs022b/sbvs022b.pdf App Note: http://www.ti.com/lit/an/sbva001/sbva001.pdf OPA277: http://www.ti.com/lit/ds/symlink/opa4277.pdf VishayPG VHP100: http://www.vishaypg.com/docs/63003/vhp100.pdf Forum: http://www.eevblog.com/forum/blog/579-precision-current-source/ ... https://www.youtube.com/watch?v=OYOYI_IPKGY