Patent ID: 6690148
Filing Date: 2004-02-10
Classification: H02M

Abstract:
A voltage generation circuit, comprising:a generator circuit adapted to receive a supply voltage and including a reference node, the generator circuit developing an output voltage from the supply voltage and the output voltage having a value that is a function of a reference voltage applied on the reference node; a coupling circuit having a level shifting circuit having a first terminal coupled to a source of the supply voltage and having a second terminal, the level shifting circuit developing a voltage on a second terminal having a value that is a function of the supply voltage, the coupling circuit further having a transistor having a first signal terminal coupled to the reference node and a second signal terminal coupled to the second terminal of the level shifting circuit, the transistor having a control terminal coupled to the voltage sensing circuit to receive a voltage control signal, and the coupling circuit further having a current source coupled between the reference node and a common voltage reference source, the coupling circuit reducing the electronic coupling of the supply voltage to the reference node responsive to a value of the voltage control signal increasing and increasing the electronic coupling of the supply voltage to the reference node responsive to the value of the voltage control signal decreasing thereby adjusting the value of the reference voltage; and a voltage sensing circuit coupled to the reference node to receive the reference voltage and coupled to the coupling circuit, the voltage sensing circuit developing the voltage control signal responsive to the reference voltage.