Patent ID: 8217684

Claim:
A method to achieve a fast and accurate current driver without current or voltage feedback for devices that require accurate current drive with zero standby current, comprising the following steps: (1) providing a power supply, a switch, a first rectifying means, a diode connected transistor used for mirroring, one or more trimmable resistors, and a second rectifying means; (2) turning ON the current driver by the switch without a need for stand-by current; (3) generating a stable reference voltage, which is insensitive to power supply voltage variation; (4) generating a stable first reference current by connecting a resistor to said reference voltage; (5) deploying the diode connected transistor used for mirroring and the second rectifying means in series in the path of the stable first reference current; (6) mirroring said stable reference current to a second reference current; (7) fine-tuning said second reference current by adjusting one or more trimmable resistors; and (8) using the second reference current as write current.