Voltage-to-current converter circuit with independent and adjustable compensation for process, voltage, and temperature

摘要

A voltage-to current (V-to-I) converter circuit for use in combination with a current-controlled oscillator (ICO) to form a voltage-controlled oscillator (VCO), wherein the V-to-I converter circuit provides a current to the ICO while this current ranges itself corresponding to the process, supply voltage, and temperature needs of the ICO, thus allowing a more stabilized ICO and VCO. In one embodiment, the V-to-I circuit allows for independent adjustability to compensate for each quantity of required process, supply voltage, and temperature. In another embodiment, the V-to-I circuit includes compensation circuitry for process and temperature only. There is no need for supply voltage compensation because the supply voltage for the V-to-I converter circuit is provided from a supply that has been linearly regulated and preferably built-in on the chip.