Method and System for Gain Boosting in Linear Regulators

摘要

A method and a system for increasing the open loop gain of linear regulators is presented. A linear regulator configured to derive an output voltage from an input voltage is described. The linear regulator comprises an amplifier configured to derive an amplifier output signal from an amplifier input signal, and a pass device configured to convert the amplifier output signal into the output voltage. The linear regulator comprises a positive feedback loop using a positive feedback gain γ, and a negative feedback loop using a negative feedback gain β. In addition, the linear regulator comprises a combining unit configured to determine the amplifier input signal from the input voltage, from the positive feedback signal and from the negative feedback voltage. A transfer function of the linear regulator exhibits a first and a second pole at a first frequency wp1 and at a second frequency wp2, respectively.

主权项

1) A linear regulator configured to derive an output voltage from an input voltage, the linear regulator comprising,
an amplifier configured to derive an amplifier output signal from an amplifier input signal; a pass device configured to convert the amplifier output signal into the output voltage; a positive feedback loop configured to determine a positive feedback signal from the amplifier output signal, using a positive feedback gain γ; a negative feedback loop configured to determine a negative feedback signal from the output voltage, using a negative feedback gain β; and a combining unit configured to determine the amplifier input signal from the input voltage, from the positive feedback signal and from the negative feedback voltage; wherein a transfer function of the linear regulator exhibits a first and a second pole at a first frequency wp1 and at a second frequency wp2, respectively.