2 NEW TEMPERATURE COMPENSATED CURRENT SOURCES

Two new temperature compensated current sources implemented from bipol ar transistors have been inspected. They are both deduced from the sch ema of the cascode current mirror and necessitate a total of six or se ven transistors. Their performance have been compared to an earlier in troduced current source with four transistors, Simulation and experime ntal results are reported, They indicate that for 5 V supply the new c urrent sources are both less temperature sensitive than the preceding one over the range -55 degrees C to +125 degrees C. One of them (circu it C) was also found particularly suited to design current sources wit h a low supply voltage approaching 2 V-BE.