Abstract:
A new compact total-current reference source is proposed here, which is composed of two cross-connected classical current mirrors: a modifiedWilson mirror and a Widlar mirror. This type of current reference can be interconnected simply, serially, with a charge having one grounded or connected to the voltage supply end. The first and second-order current-thermal-compensation conditions are deduced. The source design and simulation results are presented. The second-order thermal-compensation source has the performances: maximum current variation of only 0.5% across the temperature range 0…100oC and a supply regulation of only 1670ppm/V.