Patent ID: 7279881
Filing Date: 2007-10-09
Classification: G05F,G11C

Abstract:
1. An integrated circuit for regulating a voltage generator, the integrated circuit comprising: a first input terminal to apply a first voltage potential; a second input terminal to apply a second voltage potential; an output terminal to generate an output voltage; a voltage generator including a first controllable resistor and a first control terminal to set a resistance value for the first controllable resistor, and a second controllable resistor and a second control terminal to set a resistance value for the second controllable resistor, wherein the first input terminal is connected to the output terminal via the first controllable resistor and the second input terminal is connected to the output terminal via the second controllable resistor; a first comparator circuit to generate a first control signal at a level dependent on a comparison of the output voltage with a first reference voltage that is fed to the first control terminal so as to set the resistance value of the first controllable resistor; a second comparator circuit to generate a second control signal at a level dependent on a comparison of the output voltage with a second reference voltage that is fed to the second control terminal so as to set the resistance value of the second controllable resistor; and a control unit to generate the first control signal at a first level and to generate the second control signal at a second level; wherein the control unit is driven with the first control signal generated by the first comparator circuit and with the second control signal generated by the second comparator circuit; wherein the first control signal at the first level that is generated by the control unit is fed to the control terminal of the first controllable resistor so as to set the resistance value of the first controllable resistor, and the second control signal at the second level that is generated by the control circuit is fed to the control terminal of the second controllable resistor so as to set the resistance value of the second controllable resistor; wherein the control unit is configured to drive the control terminal of the first controllable resistor with the first control signal at the level that is generated by the first comparator circuit when the control unit is driven by the first comparator circuit with the first control signal at a level that controls the first controllable resistor to a low-resistance state, and when the control unit is driven by the second comparator circuit with the second control signal at a level that controls the second controllable resistor to a high-resistance state, otherwise the control unit drives the first controllable resistor with the first control signal at the first level such that the first controllable resistor is controlled to a high-resistance state; and wherein the control unit is configured to drive the control terminal of the second controllable resistor (