Patent ID: 7095295

Claim:
A method for tuning a vibratory device including a cantilevered resonator comprising the steps of: increasing a voltage V 0 supplied to said vibratory device to thereby increase the bandwidth of said vibratory device; and keeping the resonant frequency of said vibratory device at substantially the natural frequency of said cantilevered resonator, wherein said vibratory device comprises: a capacitor including a movable plate and a fixed plate spaced from each other, said movable plate being part of said cantilevered resonator; a voltage source connected to said capacitor for providing said voltage V 0 across said capacitor to produce an attractive force between said movable plate and said fixed plate; a circuit connecting said voltage source to said capacitor; and a load resistor in said circuit having a resistance R L satisfying the following equation: μ = ω 0 ⁢ c 0 ⁢ R L ( 1 - λ ) where μ is at least 10; ω 0 is the beam constant for said cantilevered resonator; c 0 is the capacitance for said capacitor; and λ is the voltage dependent coupling parameter for said voltage V 0 .