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A fully integrated receiver RF front-end designed in 0.13µm CMOS that meets the WCDMA system requirements is presented. The receiver RF front-end requires no interstage SAW filter. To handle the stringent linearity requirements in terms of both IP3 and IP2 set for the RF front-end, a current-mode passive mixer constructing a built-in high-Q bandpass filter is adopted to suppress blockers including...
In actural measurement, it is difficult to find the useful signal among background noise. This paper suggests a new method to pick up signals and find fault information by using Hilbet Huang Transmation. In signal processing, at first small wave transmation was used as low-pass filter, thus part of noise can be filtrated. Then some of intrinsic mode functions have been obtained by using empirical...
A dual-band 2.1GHz/5.2GHz low noise amplifier (LNA) which can operate at mobile band of 2.1GHz and WLAN band of 5.2GHz frequency is proposed. Input matching, noise matching and narrow-band amplifying are achieved at two frequency bands by adopting a switched inductive output load and a positive-negative feedback circuit. The proposed LNA is implemented in SMIC 0.13 μm CMOS technology with a supply...
A high linearity variable gain low noise amplifier (VGLNA) used for WCDMA receiver is presented. Power constrained simultaneous noise and input matching (PCSNIM) technique is adopted to design the inductive source degenerated LNA. To improve the dynamic range of the receiver, capacitive divider and current steering technique are adopted to implement the three gain modes. The chip was manufactured...
A low power CMOS fully-integrated on-chip inductor-less low noise amplifier (LNA) designed for short range devices (SRDs) in 0.25-mum CMOS process is presented. It is working at 315 MHz and 433 MHz. Common gate input topology is adopted to realize wideband impedance matching without tuning. Cross coupled common-gate input technique is adopted to improve the noise performance of conventional common-gate...
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