Patent ID: 8471537

Claim:
A high-voltage regulator comprising: a charge pump configured to generate a high voltage signal; a voltage regulator coupled to the charge pump and being configured to generate a regulated voltage; and an oscillator circuit having an oscillation frequency; wherein the voltage regulator comprises: a first transistor, the first transistor having a first gate terminal, a first terminal coupled to the high voltage signal, a second terminal generating the regulated voltage in response to a control signal that is applied to the gate terminal; a first voltage divider having a first end coupled to the second terminal of the first transistor and a second end coupled to a voltage potential, the first voltage divider being configured to output a first divided voltage; a second voltage divider having a third end coupled to the high voltage signal and a fourth end coupled to the voltage potential, the second voltage divider being configured to output a second divided voltage; and an operational amplifier having a first input terminal coupled to a reference voltage, a second input terminal coupled to the first divided voltage, and a first output terminal coupled to the gate terminal of the first transistor.