CMOS tunable linear current divider - Electronics Letters

Introduction: On-chip integrated circuits often need to be tunable to correct for process or temperature variations. However, unpredictable or unknown device characteristics make it hard to implement tunable linear circuits. In modern submicron CMOS technologies, the transistor characteristics can deviate significantly from the ideal behaviour. In this Letter a continuously tunable current divider is presented which is rather insensitive for MOS transistor qualities. Furthermore, the amplitude of the input current may be equal to the bias current. The divider is well suitable for analogue video circuits.