| 摘要 |
The invention provides a tuning-fork type transducer for an angular-speed sensor which realizes a stable fork-driving, realizes downsizing of the angular-speed sensor, and is capable of executing control of a vehicle body with high degree of accuracy when being used under a high-temperature environment, an angular-speed sensor using this transducer, and an automotive vehicle using this angular-speed sensor. Electric charges obtained from upper electrodes ( 13 a), ( 14 a) provided on an arm ( 10 b) are amplified respectively by current amplifiers ( 40 a), ( 40 b). The amplified signal is differentially amplified by a first differential amplifier ( 41 ), and the amplified signal is used as a monitor signal for fork-driving. An added signal obtained by adding output signals from the current amplifiers ( 40 a), ( 40 b) by an adder ( 60 ) is used as a signal for detecting the angular speed.
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