Bulk acoustic wave filter synthesis and optimization for UMTS applications

Giraud, Sylvain; Bila, Stéphane; Chatras, Matthieu; Cros, Dominique; Aubourg, Michel

doi:10.1109/freq.2009.5168315

Cited by 5 publications

(7 citation statements)

References 1 publication

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“…In the case of C p >> C m , the parallel resonant frequency ω rp that C p is considered can be expressed as: 16…”

Section: Circuit Operationmentioning

confidence: 99%

“…1 This paper presents PLL-based nanoresonator driving integrated circuit (IC) with automatic parasitic capacitance cancellation and automatic gain control. The nanoresonator was modeled by Butterworth-Van Dyke equivalent circuit model [13][14][15][16][17] with motional series branch (resistance, inductance, and capacitance) and parallel parasitic capacitance. The purpose of the proposed nanoresonator driving IC is detection of the motional resistance, which is damping parameter of the mechanical lumped-parameter model.…”

Section: Introductionmentioning

confidence: 99%

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PLL-based nanoresonator driving IC with automatic parasitic capacitance cancellation and automatic gain control

Heo

Kim

You

et al. 2021

Measurement and Control

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This paper presents a phase-locked loop (PLL) based resonator driving integrated circuit (IC) with automatic parasitic capacitance cancellation and automatic gain control. The PLL consisting of a phase frequency detector (PFD), a loop filter, and a voltage-controlled oscillator (VCO) makes the driving frequency to be locked at the resonant frequency. The resonator is modeled by Butterworth–Van Dyke equivalent circuit model with motional resistance of 72.8 kΩ, capacitance of 6.19 fF, inductance of 79.4 mH, and parasitic parallel capacitance of 2.59 pF. To mitigate the magnitude and phase distortion in the resonator frequency response, it is necessary to compensate for the parasitic capacitance. The proposed automatic parasitic capacitance cancellation loop is operated in the open-loop mode. In the automatic parasitic capacitance cancellation phase, the outputs of the transimpedance amplifier (TIA) at the lower and higher frequency than the resonant frequency (VH and VL), are compared, and the programmable compensation capacitor array matches the VH and VL using binary-searched algorithm to cancel the parallel parasitic capacitance. The automatic gain control (AGC) loop keeps the oscillation at the suitable amplitude, and the AGC output can be used as a measurement of the motional resistance. The AGC loop is also digitally controlled. The proposed resonator driving IC is designed in a 0.18-μm bipolar complementary metal oxide semiconductor double-diffused metal oxide semiconductor (BCDMOS) process with an active area of 3.2 mm2. The simulated phase noise is −61.1 dBc/Hz at 1 kHz and the quality factor ( Q-factor) is 59,590.

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“…In the case of C p >> C m , the parallel resonant frequency ω rp that C p is considered can be expressed as: 16…”

Section: Circuit Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

PLL-based nanoresonator driving IC with automatic parasitic capacitance cancellation and automatic gain control

Heo

Kim

You

et al. 2021

Measurement and Control

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“…The synthesis of a UMTS filter has been performed [23], where a passband is needed for the 1920 -1980 MHz range. Important constraints of the UMTS standard [24] are a high rejection and a high selectivity.…”

Section: Baw Filter 5121 Filter Synthesismentioning

confidence: 99%

Modeling and Design of BAW Resonators and Filters for Integration in a UMTS Transmitter

Chatras¹,

Bila²,

Giraud³

et al. 2013

Modeling and Measurement Methods for Acoustic Waves and for Acoustic Microdevices

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“…The two filters were designed to match the WCDMA standard, using the procedure described in [7], [8]. Based on a first estimation of achievable resonator electromechanical coupling and quality factors, Butterworth-Van Dyke (BVD) lumped element models of resonators were built and used for filter synthesis.…”

Section: Wcdma Duplexer Filters Designmentioning

confidence: 99%

Multiple frequency Solidly Mounted BAW filters

Reinhardt

Clément

Olivares

et al. 2011

2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings

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Abstract-This paper reports the simultaneous fabrication of Receive and Transmit Bulk Acoustic Wave filters for the WCDMA standard on the same die. Both filters are based on Solidly Mounted Resonators using a common Bragg mirror, but with each having a specific piezoelectric film thickness. Electrical measurements reveal that the process steps required to provide the two different piezoelectric film thicknesses on the same die does not impact the electrical performances of resonators and filters and that this approach could thus be generalised to more than two filters.

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Bulk acoustic wave filter synthesis and optimization for UMTS applications

Cited by 5 publications

References 1 publication

PLL-based nanoresonator driving IC with automatic parasitic capacitance cancellation and automatic gain control

PLL-based nanoresonator driving IC with automatic parasitic capacitance cancellation and automatic gain control

Modeling and Design of BAW Resonators and Filters for Integration in a UMTS Transmitter

Multiple frequency Solidly Mounted BAW filters

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