| 摘要 |
<p>A frequency selection device comprises an oscillator, which comprises a resonator mass (m) which is connected by a spring arrangement (60,62) to a substrate, and a piezoresistive element (62) for controlling oscillation of the resonator mass, which comprises a piezoresistive element connected to the resonator mass (m). A current is driven through the piezoresistive element (62) to control oscillation of the resonator mass. An input is provided for coupling a signal from which a desired frequency range is to be selected, to the resonator mass; and a detector is used for detecting a signal amplified by the oscillator.</p> |
