| 摘要 |
PURPOSE:To shorten the time when the integration output is unstable in case of the start of integration, by providing a switching means in the input part of an integration circuit to which an AC is inputted and interrupting the input to input it to the integration circuit for a prescribed time when integration is started. CONSTITUTION:In the integration circuit which is used for camera rocking acceleration detection and converts an acceleration signal to a speed signal, an analog switch 54 is interrupted by an unstable multivibrator 51 when integration is started. This period is an about half cycle of the input AC, and the switch 54 is interrupted odd times or several tens or more times during this period. Thus, the time when the integration output is unstable in the initial stage is shortened to about 1/4 in comparison with non-interruption regardless of the phase of the AC input at the start of integration. The input frequency for camera rocking is near 2Hz especially, and it is probably preferable that the turn-on/off control time is 0.2-0.25sec and the turn-on/off frequency is >=60Hz.
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