Title :
High-frequency thin-film piezoelectric transformers
Author :
Fatemi, Hediyeh ; Abdolvand, Reza
Author_Institution :
Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Tulsa, OK, USA
Abstract :
A voltage step-up/impedance transformer is presented which operates by modifying the electrode configuration of lateral-extensional mode thin-film piezoelectric-on-substrate (TPoS) resonators. The individual electrode pairs that cover the stress concentration areas of a 10th order harmonic 30MHz resonator are connected in series at the output port to effectively unbalance the input and output impedances. After inductive cancellation of the electrode/pad capacitances at the output port, a voltage gain of +10.4 dB is achieved in such transformers. Additionally, an impedance transformation ratio of 19:1 is obtained.
Keywords :
crystal resonators; high-frequency transformers; impedance convertors; potential transformers; TPoS resonators; electrode configuration; frequency 30 MHz; gain 10.4 dB; high-frequency thin-film piezoelectric transformers; impedance transformer; inductive cancellation; lateral-extensional mode thin-film piezoelectric-on-substrate resonators; pad capacitances; stress concentration; tenth order harmonic resonator; voltage step-up trasformer; Capacitors; Electrodes; Impedance; Metals; Resonant frequency; Thumb;
Conference_Titel :
Frequency Control Symposium (FCS), 2012 IEEE International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1821-2
DOI :
10.1109/FCS.2012.6243690
