An ultra-miniature, low cost single ended to differential filter for ISM band applications

Gilbert, Stephen R.; Parker, R.; Small, Martha; Koelle, U.; Larson, J.D.; Ruby, R.

doi:10.1109/mwsym.2008.4632963

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…Piezoelectric transformers have some advantages over these techniques including voltage isolation, small size, better performance especially at higher frequencies, and that they do not introduce electromagnetic noise. Single ended to differential transformers have been previously realized through FBAR resonators with 4:1 impedance transformation [5]. Some work has also been done to develop lateral-extensional resonators as piezoelectric transformers [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

High-frequency thin-film piezoelectric transformers

Fatemi

Abdolvand

2012

2012 IEEE International Frequency Control Symposium Proceedings

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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 10 th order harmonic 30MHz resonator are connected in series at the output port to effectively unbalance the input and output impedances. After inductive cancelation 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.

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Section: Introductionmentioning

confidence: 99%