Patent ID: 6788037
Filing Date: 2004-09-07
Classification: G05F

Abstract:
A compensation circuit for a voltage converter that converts a first voltage applied to an input voltage node to an output voltage provided at an output voltage node, the output voltage having a lower voltage than the first voltage based on the voltage of a control signal applied to a control terminal of a voltage controlled impedance device coupled between the input and output voltage nodes, the compensation circuit comprising:a switch coupled between the input voltage node and the control terminal of the voltage controlled impedance device and having a control terminal, the switch coupling the input voltage node to the control terminal in response to the output voltage decreasing in excess of a voltage difference; and a voltage divider having load elements coupled between the input node and ground and further having a bias node coupled to the control terminal of the switch and the output node, the voltage divider maintaining a voltage at the control terminal of the switch to isolate the input node and the control terminal of the voltage controlled impedance device until the voltage of the output voltage decreases in excess of the voltage difference.