Patent ID: 7049880

Claim:
A direct current voltage regulator circuit comprising: a first operational amplifier configured to function as a comparator, the first operational amplifier having a first input, a second input, and an output, the first input of the first operational amplifier configured to be coupled to an output of a voltage generator and the second input of the first operational amplifier configured to be coupled to a reference voltage; a logic gate, the logic gate having a first input, a second input, and an output, the output of the operational amplifier being configured to be coupled to the first input of the logic gate, the second input of the logic gate being configured to be coupled to a clock signal, and the output of the logic gate being configured to enable or disable the application of the clock signal to the voltage generator; a current control device having a source terminal, a sink terminal, and a control terminal, the current control device source terminal being configured to be coupled to the output of the voltage generator; a second operational amplifier, the second operational amplifier having a first input, a second input, and an output, the first input of the second operational amplifier being coupled to the current control device sink terminal, the second input of the second operational amplifier being configured to be coupled to a second reference voltage and the output of the second operational amplifier being configured to be coupled to the current control device control terminal; and a control switching device, the control switching device having a first input terminal, a second input terminal, and an output terminal, the first input of the control switching device being coupled to the output of the second operational amplifier and the output terminal of the control switching device being coupled to the control terminal of the current control device.