Shake detector

A shake detector comprising:

• a shake detection unit that detects an amount of shake of an imaging apparatus, and outputs a shake detection signal indicating the detected amount of shake and a reference signal used as a reference of the shake detection signal;
• a signal processing unit that amplifies and smoothes the shake detection signal and the reference signal from the shake detection unit, and outputs the shake detection signal as a signal used in subsequent processing for offsetting the amount of shake of the imaging apparatus;
• an adjustment unit that outputs an adjustment signal for adjusting an output signal from the signal processing unit;
• and
• a control operation unit that, in a first period for which there is no shake in the imaging apparatus, stores a control value for controlling the adjustment unit such that the output signal from the signal processing unit has a predetermined value on the basis of the reference signal from the shake detection unit, and that, in a second period different from the first period, generates and outputs a control signal for controlling the adjustment unit on the basis of both the reference signal from the shake detection unit and the control value stored in the first period.