Transduced Single - Ended to Differential MEMS Filter
نویسندگان
چکیده
Single-ended to differential micromechanical filters with large stop band rejection are ideal replacements for conventional SAW and FBAR filters [1,2] in sensor network transceivers and GSM and W-CDMA cell phones, which depend on differential signal paths. A differential output from the front-end filter eliminates the need for an off-chip balun in front-end radio design and increases filter linearity (Fig. 17.6.1). This paper reports on the design and performance of a single-ended input to differential output resonant electromechanical filter at 425MHz center frequency with 1MHz bandwidth (BW), 8dB insertion loss (IL), <5dB pass-band ripple, -50dB stop-band rejection, and -48dB common mode suppression (CMS), for a footprint of about 150×150μm.
منابع مشابه
A Micro-Watt Second Order Filter for a Chopper Stabilized MEMS Pressure Sensor Interface
This paper describes a low-power second-order filter for a continuous-time chopper stabilized capacitive sensor interface, integrated with a fully differential post-CMOS surface-micromachined MEMS pressure sensor. The circuit uses a single-ended folded-cascode operational amplifier and two GM-C filters connected in cascade. The circuit is realized in a 0.18 μm CMOS process and offers differenti...
متن کاملImprovement in Differential GPS Accuracy using Kalman Filter
Global Positioning System (GPS) is proven to be an accurate positioning sensor. However, there are several sources of errors such as ionosphere and troposphere effects, satellite time errors, errors of orbit data, receivers errors, and errors resulting from multi-path effect which reduce the accuracy of low-cost GPS receivers. These sources of errors also limit the use of single-frequency GPS r...
متن کاملImplementation of a Low- Cost Multi- IMU by Using Information Form of a Steady State Kalman Filter
In this paper, a homogenous multi-sensor fusion method is used to estimate the trueangular rate and acceleration with a combination of four low cost (< 10$) MEMS Inertial MeasurementUnits (IMU). An information form of steady state Kalman filter is designed to fuse the output of four lowaccuracy sensors to reduce the noise effect by the square root of the number of sensors. A hardware isimplemen...
متن کاملSingle DV-DXCCII Based Voltage Controlled First Order All-pass Filter with Inverting and Non-inverting responses
In this paper, a new voltage controlled first order all-pass filter is presented. The proposed circuit employs a single differential voltage dual-X second generation current conveyor (DV-DXCCII) and a grounded capacitor only. The proposed all-pass filter provides both inverting and non inverting voltage-mode outputs from the same configuration simultaneously without any matching condition. Non-...
متن کاملHigh-κ dielectrically transduced MEMS thickness shear mode resonators and tunable channel-select RF filters
Electrically coupled, high quality factor (Q), tunable channel-select ladder filters comprised of dielectrically transduced thickness shear mode esonators are presented using integrated circuit compatible bulk micromachining technology. The filters are fabricated on the 3.2 m thick device ayer of heavily doped SOI wafers with a 20 nm thick hafnium dioxide film sandwiched between the polysilicon...
متن کامل