A novel low power RF receiver front-end for 3–5 GHz UWB is presented. Designed in the 0.13 μm CMOS process, the direct conversion receiver features a wideband balun-coupled noise cancelling transconductance input stage, followed by quadrature passive mixers and transimpedance loading amplifiers. Measurement results show that the receiver achieves an input return loss below −8.5 dB across the 3....

This paper describes a baseband analog (BBA) chain for wireless local area network (WLAN) applications. For the given specifications of the receiver BBA chain, the optimum allocation of the gain and filter rejection of each block in a BBA chain is achieved to maximize the SFDR. The fully integrated BBA chain is fabricated in 0.13 μm CMOS technology. An input-referred third-order intercept point...

In this paper a 3.5 GHz down conversion mixer with 20 MHz IF output signal for location-fixed WiMAX systems is presented. The proposed mixer is implemented with TSMC 0.18μm RF CMOS technology with 1.5V supply voltage which utilizes Current-Bleeding and Current-Reuse techniques to improve noise figure and conversion gain of conventional Gilbert-type structure. This mixer achieves 12 dB of conver...

This work presents a 2.4 GHz, reconfigurable RF Low Noise Amplifier (LNA) using on-chip peak detection and calibration, to mitigate the deleterious effects of process, voltage and temperature (PVT) variations. The LNA can reconfigure its input impedance matching, as well as its gain. On-chip detection of optimal input/output impedance matching is performed using an amplitude peak detector. The ...

A noise reduction input matching technique for broadband low noise amplifiers (LNAs) is presented. The proposed LNA employs a positive active feedback network besides of the conventional common-gate (CG) amplifier to achieve both wideband input signal matching and low noise figure (NF), simultaneously. Compared to the conventional broadband noise cancellation techniques, the presented approach ...

In this paper, a low-power up-conversion current-mode mixer, designed in the chartered 0.18-μm RFCMOS technology, is proposed to realize the transmitter front-end in the frequency band of 2.4 GHz. The proposed mixer can convert a 10 MHz intermediate frequency (IF) signal to a 2.4 GHz RF signal, with a local oscillator power of 2 dBm at 2.39 GHz. A comparison with conventional voltage-mode up-co...

A CMOS Variable Gain Amplifier (VGA) is proposed for high frequency and low power broadband communication systems, such as Ultra-Wide Band (UWB) receiver. The VGA consists of a P/NMOS complimentary differential-pair with source degeneration, a high-swing current mirror stage with capacitive feedforward frequency compensation, and resistive load. Description Based on an OFDM UWB receiver system’...

This article presents the theory and implementation of a quadrature differential RF front-end receiver. Combining balun, low-noise amplifier (LNA), mixer, oscillator in single stage, proposed circuit, named Blixator, is well suited for low-power applications. The baseband’s transimpedance (TIA) also shares part its dc current with Blixator cell, resulting sub-milliwatt power consumption. To avo...

This paper presents a K-band Gilbert mixer in a 0.18μm CMOS technology by means of a π-Network and Post Distortion Cancellation (PDC) technique to achieve high gain, high linearity, and moderate noise figure. We use the parasitic capacitances that appear at nodes between RF and LO stage for implementing π-Network. Circuit analysis and MATLAB simulation show that the above technique is useful fo...