Patent ID: 7420411

Claim:
A voltage control circuit, comprising: an input configured to supply an input voltage; a circuit output configured to output a supply voltage; a control input configured to supply a voltage control signal for adjustment of the supply voltage; a voltage converter whose output voltage is variable, having a converter control input, wherein the voltage converter is configured to emit the output voltage at an output based on an input voltage, which is applied to an input, and a control signal at the converter control input; a control loop with the voltage converter arranged between a first element and a second element; wherein the first element is configured to emit the difference between signals which are applied to a first and to a second connection thereof, with the first connection being coupled to the control input and with the second connection being coupled to the circuit output, forming a feedback path; and wherein the second element is configured to emit the sum at the circuit output of signals which are applied to a first and to a second connection thereof, with the first connection being coupled to the output of the voltage converter, and the second connection being coupled to the control input of the voltage control circuit.