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This work presents the feasibility of a new method to reconfigure Bulk Acoustic Wave-Solidly Mounted Resonator (BAW-SMR) filters by adding capacitors in series with transistors to the shunt resonators and by controlling these transistors with a 2to4 decoder. This method is applied to filters operating in the W-CDMA (2.11–2.17 GHz) communication standard. Experimental results show a tuning range of...
This paper presents a method to reconfigure Bulk Acoustic Wave-Solidly Mounted Resonator (BAW-SMR) filters. It shows the effect of the gate voltage which controls the filter bandwidth with MOS transistors. This method is applied to filters operating in the W-CDMA (2.11–2.17 GHz) communication standard. Experimental results show a tuning range of 9MHz, whereas 12MHz of tuning range was achieved in...
This paper presents two different methods to reconfigure Bulk Acoustic Wave-Solidly Mounted Resonator (BAW-SMR) filters. The first method proposes the use of RF-MEMS and the second one proposes the addition of capacitors and MOS transistors. This paper shows also the effect of the gate voltage which controls the filter bandwidth with MOS transistors. The first reconfigurable method, is applied to...
A study based on improving linearity of an integrated RF power amplifier (PA) has been done for W-CDMA standard. This power amplifier had been designed in 65 nm CMOS of STMicroelectronics under Cadence. The chosen linearization technique is a Cartesian Feedback (CFB). Thanks to this linearization technique, the ACPR has been improved by 22 dB at 5 MHz from the carrier for an output power of 18 dBm.
This paper presents a fully-integrated low-noise amplifier (LNA) to W-CDMA applications. A noise/input impedance matching methodology is applied to design the input stage of the LNA cascode topology. For circuit manufacturing, we have used a BiCMOS SiGe:C 0.25mum process which is well suited to low-noise applications. Good overall measured performances, in good agreement with simulation, are obtained.
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