Device for driving and detecting oscillator
AssigneeAlps Electric Co., Ltd.
InventorsKazuo Hasegawa, Daisuke Takai
Life of this patent
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Abstract
When output signal of an oscillator are binarized by binarization means, a timing signal for driving a sequence controller for controlling a correction portion is rested temporarily. The process for overwriting the contents of an E2ROM of the correction portion side with an RAM is rested temporarily. This can prevent noise product at the overwriting timing. Binary signals after binarization can be prevented from being varied. The oscillator can be driven stably so as to give an angular speed output with high accuracy.
Claims4
A device for driving an oscillator and detecting an oscillator output comprising an oscillator for outputting output signals of different phases when an angular speed is given, a drive control portion for driving the oscillator, and a detection control portion for detecting the angular speed output based on the output signals of the oscillator,
- the detection control portion having binarization means for converting the both output signals to binary signals corresponding to the amplitude polarity, a phase detection portion for detecting the angular speed output based on the phase difference component between the both binary signals, a correction portion for performing a correction process for the output of the phase detection portion corresponding to the characteristic of the oscillator, and data holding means provided in the correction portion for holding the contents of memory overwritten with data pieces stored in a data store portion, wherein
- the operation of the data holding means is controlled so as to temporarily rest the overwriting of the memory for a fixed period including the time for switching the amplitude polarities in the binarization means.
Dependencies are inferred from the claim text.