OFDM systems suffer from a high dynamic of the transmit signal, which leads to out-of-band radiation due to nonlinearities in the transmitter front-end. In order to overcome this issue there exist a variety of schemes reducing the out-of-band power. Most of these schemes consider the peak-to-average power ratio (PAR) as optimization criterion. In this paper, the PAR reduction scheme selected ma...

A numerical design method is presented for the design of all pole band pass active-RC filters applying just one operational amplifier. The operational amplifier model used is the integrator model: t/s where t is the unity gain frequency. The design method is used for the design of a fourth order band pass filter with Butterworth poles applying just one operational amplifier coupled as a unity g...

In this paper, a new design of concurrent dual-band Low Noise Amplifier (LNA) for multi-band single-channel Global Navigation Satellite System (GNSS) receivers is proposed. This new structure is able to operate concurrently at frequency of 1.2 and 1.57 GHz. Parallel and series resonance parts are employed in the input matching in order to achieve concurrent performance. With respect to used pse...

..4bstract—A novel ultrabroad-band amplifier configuration suitable for GaAs FET’s has been developed. The developed amplifier circuit operates as a capacitor-resistor ( C–R ) coupled mnpfifier circuit in the lowfrequency range in which IS21 I for the GaAs FET’s is constant. It also operates as a lossless impedance matching circuit in the microwave frequency range in which IS21 I for the GaAs F...

In this work, the construction of a single stage L-band erbium-doped fiber amplifier which incorporates a short 5.1 m erbium doped fiber coil is described. Gain and noise figure measurements as a function of forward, backward and counter-propagating CW 1480 nm pumping schemes at different pump power levels are presented. Further, the Erbium Doped Fiber Amplifier (EDFA) power conversion efficien...

A three-stage V-band amplifier implemented in 65-nm baseline CMOS technology is presented in this paper. Slow-wave coplanar waveguides are used for matching and interconnects to study the benefits of using this line type in amplifier design. Measured power gain, noise figure and 1 dB output compression point at 60 GHz are 13 dB, 6.3 dB and ?4 dBm, respectively. The amplifier has 19.6 GHz of 3 d...

This paper presents an UWB low noise amplifier (LNA) based on current reused topology to achieve low power on overall circuit in the band of 3~16GHz. Measurement of the input and output reflection coefficient S11, S22 are less than 10 dB, the maximum amplifier gain S21 gives 9.7dB, the minimum of the noise figure is 4.2dB, the measured IIP3 is 8.5dBm at 6GHz. It consumes 11mW power consumption ...

In this paper, a new image-reject low noise amplifier is designed for the 2.4 GHz industrial-scientific-medical (ISM) band. An inter-stage T-structure filter is used in the low noise amplifier design to provide 35-dB image rejection. The goal of this design is to merge the image-reject function into the low noise amplifier.

An S-band gain-clamped erbium-doped fiber amplifier module, employing a fiber Bragg grating to serve as a reflected element for lasing a saturated tone injected into the module by forward optical feedback method, is proposed and investigated experimentally. Moreover, the performance and behavior of the gain and noise figure in the proposed gain-clamped S-band fiber amplifier have also been disc...

In this paper, a differential multi-band CMOS low noise amplifier (LNA), operated in a wide range from 800MHz~1700MHz, with wide-band interference rejection, linearity improvement and the capacitive cross-coupling technology, is proposed. The proposed differential multi-band CMOS low noise amplifier with high linearity performance and good interference rejection performance. The post-simulation...