Patent ID: 7598827
Filing Date: 2009-10-06
Classification: H03H

Abstract:
1. An impedance transformation network, comprising: an input for receiving an electrical signal; a shunt harmonic BAW resonator, coupled to receive the electrical signal, that shorts at least one harmonic frequency of the electrical signal; an input BAW transformation stage, coupled in parallel with the harmonic BAW resonator, that provides a first impedance transformation and comprises a series BAW resonator having an associated series resonant frequency and a shunt BAW resonator, coupled to the series resonator in an L configuration, having an associated parallel resonant frequency; at least one additional transformation stage, coupled in parallel to the input BAW transformation stage, that provides a second impedance transformation; and wherein an impedance transformation occurs between the input BAW transformation stage and the output of at least one additional transformation stage, the magnitude of the impedance transformation is related to series and parallel resonant frequencies of the input BAW transformation stage and the at least one additional transformation stage.