Patent ID: 8451337

Claim:
An image stabilization control circuit, comprising: an analog-digital conversion circuit configured to convert an analog signal output by a gyro sensor to a digital signal; a high-pass filter configured to remove a low-frequency component from a signal output by the analog-digital conversion circuit; a movement amount calculation circuit configured to calculate a movement amount of an imaging apparatus based on an output signal of the high-pass filter; a centering processing circuit configured to subtract a predetermined value from the movement amount output from the movement amount calculation circuit so as to prevent an optical element from approaching a limit point of a movable range, and output a result signal to a servo circuit; a servo circuit configured to generate a correction signal for correcting a position of the optical element based on the output result signal of the centering processing circuit and output the correction signal to an optical element driving element; a pan/tilt determination circuit configured to compare an output signal of the high-pass filter with a predetermined threshold and determine whether a panning operation or a tilting operation is performed based on a result of comparison; and an amplification circuit configured to amplify the output signal of the high-pass filter and change an amplification rate according to the result determined by the pan/tilt determination circuit, and wherein each of the high-pass filter, the movement amount calculation circuit, the centering processing circuit, the pan/tilt determination circuit, and the amplification circuit is implemented not by a microcomputer but by a logic circuit and includes a digital filter circuit and a register; the digital filter circuit performs filter processing based on a filter coefficient stored in the register; and the optical element provided in the imaging apparatus is moved based on the output signal of the gyro sensor provided in the imaging apparatus.