Patent ID: 6252385
Filing Date: 2001-06-26
Classification: G05F,Y10S

Abstract:
A control and regulation circuit for a regulated DC power supply including a power stage with a control input, an input for an unregulated power supply DC voltage, an output for the regulated DC voltage, and a decoupling capacitor connected between a reference potential and the output, for a regulated and gradual increase in voltage, the control and regulation circuit comprising:a control and regulation loop having an input for connection to the output of the power stage and an output for connection to the control input of the power stage, the control and regulation loop comprisinga first controllable switch,a current generator connectable to the input of the control and regulation loop via the first controllable switch, anda logic circuit for controlling the first controllable switch, the logic circuit including a first input for receiving a first threshold voltage, a second input for receiving a signal representing a difference between a nominal value of the output regulated DC voltage from the power stage and a real value of the output regulated DC voltage from the power stage, the logic circuit generating a first value corresponding to a closed position of the first controllable switch such that the decoupling capacitor is charged by the current generator, the first value being present as long as a value of the signal representing the difference between the nominal value of the output regulated DC voltage from the power stage and the real value of the output regulated DC voltage from the power stage received at the second input of the logic circuit is less than the value of the first threshold voltage received at the first input to the logic circuit, the logic circuit generating a second value corresponding to an open position of the first controllable switch when the value of the signal representing the difference between the nominal value of the output regulated DC voltage from the power stage and the real value of the output regulated DC voltage from the power stage is greater than the value of the first threshold voltage.