A CMOS voltage to current converter for low voltage applications
This correspondence introduces two circuit ideas which are applied to the design of a voltage to current converter circuit for application in analog CMOS circuits. The ideas are aimed at achieving an output current which is set by a precision reference voltage and achieving a high output impedance without the use of a cascode connection. The resulting circuit achieves a fast settling time and requires a minimum bias headroom voltage, making it suitable for use in low voltage battery-powered designs.
voltage to current converter current reference