Patent ID: 7450354

Claim:
A linear voltage regulator comprising: a regulating transistor having a control electrode, a first channel electrode connected to an input voltage source, and a second channel electrode for providing an output voltage; a feedback circuit for generating a feedback signal representative of the output voltage; and an error amplifying circuit for, based on comparison between the feedback signal and a predetermined reference voltage, generating an error signal for controlling the control electrode; an event detecting circuit, coupled to the input voltage source, for generating an event signal indicative of a transient event of the input voltage source; an enable controlling circuit having a first comparator and a second comparator for generating a first enable signal and a second enable signal in response to the event signal, a first predetermined trigger voltage, and a second predetermined trigger voltage, wherein the event signal is coupled to the first comparator and the second comparator; and a voltage clamping circuit for clamping a potential difference between the first channel electrode and the control electrode in response to the first enable signal and the second enable signal.