Patent ID: 6137280
Filing Date: 2000-10-24
Classification: H02J,H02M

Abstract:
A power management system comprising:a first monolithic potentiometer, having at least 512 positions, the first monolithic potentiometer comprising at least one tap point, the at least one tap point including a tap control input, the at least one tap point being responsive to the tap control input;a second monolithic potentiometer coupled in series with the first monolithic potentiometer, and having at least 512 positions, the second monolithic potentiometer comprising at least another tap point, the at least another tap point including another tap control input, the at least another tap point being responsive to the other tap control input;means for switchably selecting a resultant tap point selected from the at least one tap point and the at least another tap point, and for applying a control signal to the tap control input or the other tap control input, respectively in accordance with the selected one of the at least one tap point and the at least another tap point, the resultant tap point and the control signal together determining an overall resistance of the first and second monolithic potentiometers;means coupled to the first and second monolithic potentiometers for maintaining a constant output voltage that is proportional to the overall resistance of the first and second monolithic potentiometers in response to varying input voltages.