Patent ID: 7656253
Filing Date: 2010-02-02
Classification: H03H,Y10T

Abstract:
1. An apparatus, comprising: a piezoelectric layer; an input transducer configured to convert an input signal from an input source to a surface acoustic wave and send the surface acoustic wave from an input portion of the piezoelectric layer to an output portion of the piezoelectric layer, wherein the input transducer comprises a set of input passbands; an output transducer configured to receive the surface acoustic wave from the output portion of the piezoelectric layer, wherein the output transducer comprises a set of output passbands; at least one electrode set configured to apply at least one voltage bias to at least one portion of the piezoelectric layer to create an electric field that controls an acoustic velocity of the surface acoustic wave through the at least one portion of the piezoelectric layer; wherein the at least one electrode set is configured to control one or more of the set of input passbands and the set of output passbands by adjustment of the at least one voltage bias.