Patent ID: 7787018

Claim:
A shake detecting apparatus, comprising: an amplifying unit configured to amplify a difference signal between an offset signal and a sensor signal in accordance with shake of an imaging device, the amplifying unit amplifies the difference signal, based on an amplification factor signal, in any mode of a first amplification factor mode in which the difference signal is amplified at a first amplification factor, and a second amplification factor mode in which the difference signal is amplified at a second amplification factor smaller than the first amplification factor, and the amplifying unit outputs the difference signal amplified at the first amplification factor or the second amplification factor; an A/D converter configured to convert the difference signal from the amplifying unit into a digital signal; a shake-information generating unit configured to generate shake information representing the shake of the imaging device based on the digital signal; a controller configured to receive the digital signal for variably setting a digital offset signal based on the digital signal, and to generate the amplification factor signal; an offset outputting unit configured to output the digital offset signal set by the controller; and a D/A converter configured to convert the digital offset signal outputted from the offset outputting unit into the offset signal, and to output the offset signal to the amplifying unit, wherein the controller updates the offset signal based on the digital signal obtained in the second mode, and generates the shake information based on the digital signal obtained in the first mode.