Detector

Abstract

According to one embodiment, a detector is disclosed. The detector has a mechanism with first and second vibrators which vibrate in first and second directions. Circuits detect output first and second signals conforming to the detected positions of the vibrators. A detection circuit detects second signal using the first signal as a reference of synchronous detection and outputs a detection signal. A filter continues a moving average process on the detection signal for a period set based on the first signal. A controller circuitry controls the mechanism to causes the first vibrator to start vibrating in the first direction in synchronization with a clock signal.

What is claimed is: 
     
         1 . A detector comprising:
 a vibration mechanism including a first mechanical vibrator vibrating in a least a first direction, and a second mechanical vibrator mechanically connected to the first mechanical vibrator and vibrating in at least a second direction perpendicular to the first direction;   a first circuit configured to detect a first position of the first mechanical vibration in accordance with the first direction and output a first signal corresponding to the detected first position, the first signal including a first frequency;   a second circuit configured to detect a second position of the second mechanical vibrator in accordance with the second direction of and output a second signal corresponding to the detected second position;   a detection circuit configured to detect the second signal by using the first signal as a reference of synchronous detection and output a detection signal;   a third circuit configured to generate a third signal having a second frequency higher than the first frequency and output the generated third signal;   a filter configured to continue on a moving average process on the detection signal according to a clock signal for a period set based on the third signal; and   a first controller circuitry configured to control the vibration mechanism to cause the first mechanical vibrator to start vibrating in the first direction in synchronization with the clock signal.   
     
     
         2 . The detector according to  claim 1 , wherein the second frequency is P (P is an integer equal to or larger than  2 ) times the first frequency. 
     
     
         3 . The detector according to  claim 1 , wherein the period is Q (Q=P×M, M is a positive integer) times a cycle of the third signal. 
     
     
         4 . The detector according to  claim 1 , wherein the filter starts the moving average process after an elapse of a certain time set based on the third signal from a rising of a clock of the clock signal. 
     
     
         5 . The detector according to  claim 4 , wherein the certain time is R (R is a positive integer) times a cycle of the third signal. 
     
     
         6 . The detector according to  claim 1 , further comprising an amplitude control circuit configured to feed back the first signal to the first mechanical vibrator to control a magnitude of vibration amplitude of the first mechanical vibrator.