Abstract: An integrated circuit includes a composite transistor including at least a first transistor of a first technology type having a first group of intrinsic properties and a second transistor of a second technology type having a second group of the intrinsic properties, at least one of the intrinsic properties of the second group being substantially different than a corresponding intrinsic property of the first group, the second transistor having a first electrode coupled to a supply voltage, a second electrode coupled to a first electrode of the first transistor, and a control electrode coupled to a bias voltage conductor and also coupled to a control electrode and a second electrode of the first transistor. A source of bias current is coupled to the bias voltage conductor and is also coupled to the second electrode of the second transistor. A bias voltage across the composite transistor is produced on the bias voltage conductor to bias a cascode transistor of the first technology type.

Abstract: The present application describes a frequency compensation scheme for a linear voltage regulator circuit, or its special case, a low-drop out voltage regulator (LDO). According to one embodiment, the frequency compensation scheme includes two circuits, an inner loop compensation circuit (240), and a circuit (245) at the output in parallel with one of the resistors of the output voltage divider (235). These two compensation elements (240, 245) are not interdependent and may be adjusted separately to provide more optimal frequency compensation. Advantages include smaller compensation circuit elements, die or board area savings, better phase margin over process technology variations and operating conditions, and ease of design adjustment.