A digital potentiometer is purely a CMOS device. All switches are large, CMOS transmission gates operated in the linear region to yield low, uniform on resistance of the CMOS (RDS(ON)). All resistor elements are polysilicon or thin film resistors.
A digital potentiometer is purely a CMOS device. All switches are large, CMOS transmission gates operated in the linear region to yield low, uniform on resistance of the CMOS (RDS(ON)). All resistor elements are polysilicon or thin film resistors.