Patent ID: 7170271

Claim:
A DC to DC voltage converter having an active charge/discharge circuit wherein any output voltage can be easily defined is comprising: a reference voltage; a voltage converter having an input voltage and an output voltage, wherein the output is connected to a means of capacitance and to an active device, which can discharge on a discharge signal said means of capacitance; an intelligent device controlling said DC-to-DC voltage converter; said active device being able to discharge said means of capacitance, wherein said active device is connected to the output of said voltage converter and to said means of capacitance and is receiving a discharge signal from a control logic; said means of capacitance connected to ground and to the output of said voltage converter; and said control logic circuit having an input and an output, comprising: a comparator, having inputs and an output, wherein a first input of said comparator is the output voltage of said voltage converter and a second input is said reference voltage and the output voltage of said comparator is indicating if said output voltage of said voltage converter equals or is smaller than said reference voltage; and a latch, wherein the input is the output of said comparator and a signal to start the discharge of said means of capacitance and the output of said latch is a signal to said active device to start the discharge of said means of capacitance if said input signal of the latch to start the discharge is ON and the output signal of said comparator indicates that the output voltage of the voltage converter is higher than said reference voltage and wherein said output signal of said latch interrupts the discharge of said means of capacitance if the output of said comparator indicates that the output voltage of the voltage converter equals or is lower than said reference voltage.