Image stabilization control circuit

摘要

In an image stabilization control circuit of an image-capturing device, a gyro-equalizer (24) is used to integrate an angular velocity signal corresponding to vibration, and determine a required magnitude of displacement of a lens. The gyro-equalizer (24) integrates the angular velocity signal from a gyro-sensor (12) using an integration circuit (46) (LPF), and converts the result into an angular signal. A direct-current component of the angular signal is removed using a centering circuit (52) (HPF). Excessive phase delay of the angular signal on a high-frequency side caused by a phase characteristic of the gyro-sensor (12) is compensated by a phase lead compensation circuit (50) composed of a high-boost filter, and the phase delay of the angular signal with respect to the angular velocity signal is brought nearer to 90° by an integration process.