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Journals and Conferences
This paper compares the performance of source-tuner noise-parameter extraction methods used to measure noise parameters of low-noise amplifiers that have very low (1 dB) noise figures. The methods discussed are known as the Cold method and the modified <i>Y</i> -factor method (or Hot-Cold method). The paper describes equations used in the extraction… (More)
This paper describes the design of a high speed Pulse Position Modulator (PPM) in the 90 nm CMOS process, targeted at ir-UWB applications. The PPM design presented in this work is shown to have single cycle latency at 500 MHz of operation and consumes less than 4 mW of DC power. In order to achieve single cycle latency, novel hierarchical delay line… (More)
A wide-angle Michelson Doppler imaging interferometer (WAMDII) is described that is intended to measure upper atmospheric winds and temperatures from naturally occurring visible region emissions, using Spacelab as a platform. It is an achromatic field-widened instrument, with good thermal stability, that employs four quarterwave phase-stepped images to… (More)
A technique for accurately determining the resistivity and relative permeability of tubular stock is presented. The technique is based on measurements of the inductance of a coil wound on a toroidal sample of the material, with circular cross section. Measurements for J-55 material are also included.
Radio receivers that perform analog to digital conversion closer to the antenna and do most of the signal processing in the digital domain are known as digital receivers. Digital receivers are desirable because they can be more easily re-configured for multi-standard operation, they can facilitate performance improvements by using digital filters for signal… (More)
The well-known equations for the axial internal impedance of tubular stock at high frequencies are examined and approximate solutions valid for all frequencies, diameters and wall thicknesses are formulated.
An ultra low power analog transceiver front end module for an FSK based fully differential 2.4 GHz transceiver in 0.18 mum CMOS technology is described in this paper. The transceiver consists of a programmable class C power amplifier, passive ring mixer and a matching circuit which provides the required load for the PA as well as matches the mixer input… (More)
An image-reject low-noise amplifier with passive Q-enhanced notch filters in 0.18 mum CMOS is presented. Available IR-LNA designs employ a single notch filter to reject the precise image frequency and therefore require an additional automatic tuning circuit. This design achieves image-rejection over a bandwidth by using two series-connected passive notch… (More)
This paper demonstrates the use of quasi-floating gate MOSFET (QFGMOS) in the design of a current-to-voltage converter that operates for the input current range of 0 to 50?A. The workability of the circuit has been verified using SPICE simulations for 0. 18?m CMOS technology with the supply voltages of ±0. 5V. From the simulation results, it has been… (More)