A 2.4 GHz 20 W 8-Channel RF Source Module with Improved Channel Output Balance

ISSCC 2014 / SESSION 20 / WIRELESS SYSTEMS / 20 . 8 20 . 8 A 20 mW GSM / WCDMA Receiver with RF Channel Selection

Recent work on RF receivers has exploited N-path filters to address two critical issues, namely, blocker tolerance and high RF selectivity [1,2]. However, these designs face three drawbacks: (1) the low-noise amplifier (LNA) incorporates a Gm stage that, even with a virtual ground at its output nodes, must still withstand strong blockers at its input; (2) the low-order filter transfer function ...

A 335 μ W - 72 dBm Receiver for FSK Back - Channel Embedded in 5 . 8 GHz

An ULP back-channel receiver is presented that demodulates binary a FSK back-channel signal embedded in 5.8GHz IEEE 802.11a Wi-Fi OFDM packets. The architecture of the back-channel receiver employs a two-step downconversion where the first mixing stage downconverts using the 3rd harmonic of the LO for power efficiency. The LP-65nm CMOS receiver consumes 335μW with a sensitivity of -72dBm at a B...

Transmit Coil Decoupling of 8-Channel Coil Arrays with Ultra-Low Output Impedance RF Power Amplifiers

Introduction: In previous work, an ultra-low output impedance RF power amplifier (RFPA) was introduced to reduce the effects of inter-element inductive coupling in parallel transmit arrays [1]. It uses an output-matching network to transform the MOSFET drain-source impedance into a very low value to suppress inter-element coupling effects while matching the coil input impedance to the optimum l...

Thermodynamic analysis of a magnetohydrodyamic oldroyd 8-constant fluid in a vertical channel with heat source and slippage

Thermodynamic analysis of a steady state flow and heat transfer of an Oldroyd 8-constant fluid with effect of heat source, velocity slip and buoyancy force under tranverse a magnetic field is is carried out in this paper. The model for momentum and energy balance is tackled numerically using Method of Weighted Residual (MWR). Partition method is used to minimize the associated residuals. The re...

MR Imaging with an 8-Channel RF Transmit Array