Piezoelectric resonator having combined thickness and width vibrational modes

A method for generating an oscillating signal in a piezoelectric resonator, comprising:

• receiving an electric signal across a piezoelectric element;
• establishing a first vibrational mode in a thickness dimension of the piezoelectric element;
• establishing a second vibrational mode in a width dimension of the piezoelectric element;
• and
• combining coherently the first vibration mode and the second vibration mode to produce a resonant vibration which increases a coefficient of electromechanical coupling (kt2) beyond a width-only vibration mode while providing single-chip multiple frequency capability.

A method for generating an oscillating signal in a piezoelectric resonator, comprising

• step for receiving an electric signal across a piezoelectric element;
• step for establishing a first vibrational mode in a thickness dimension of the piezoelectric element;
• step for establishing a second vibrational mode in a width dimension of the piezoelectric element;
• and
• step for combining coherently the first vibration mode and the second vibration mode to produce a resonant vibration which increases a coefficient of electromechanical coupling (kt2) beyond a width-only vibration mode while providing single-chip multiple frequency capability.

A piezoelectric resonator, comprising:

• means for receiving an electric signal across a piezoelectric element;
• means for establishing a first vibrational mode in a width direction;
• means for establishing a second vibrational mode in a thickness direction;
• and
• means for combining the first vibration mode and the second vibration mode to produce a resonant vibration which increases a coefficient of electromechanical coupling (kt2) beyond a width-only vibration mode.