Abstract: The present invention is directed to monolithic integrated circuits incorporating an oscillator element that is particularly suited for use in timing applications. The oscillator element includes a resonator element having a piezoelectric material disposed between a pair of electrodes. The oscillator element also includes an acoustic confinement structure that may be disposed on either side of the resonator element. The acoustic confinement element includes alternating sets of low and high acoustic impedance materials. A temperature compensation layer may be disposed between the piezoelectric material and at least one of the electrodes. The oscillator element is monolithically integrated with an integrated circuit element through an interconnection. The oscillator element and the integrated circuit element may be fabricated sequentially or concurrently.

Abstract: The present invention relates to transceiver systems and methods which employ shunt switches during transmit and receive operating modes. The shunt switches may be configured with various reactive networks to achieve high or low impedance states at power amplifiers or low noise amplifiers in order to reflect or transmit power along a given path. The shunt switches are designed for protection against excessive voltage swings that would otherwise damage components in the transceiver switching circuit. The switching circuits may be implemented in a single chip architecture, which results in manufacturing efficiencies, lower cost and higher reliability circuits. Single or multi band devices may also be employed.