A 1GHz Low-cost, Ultra Low-noise Preamplifier

Ultra low-noise current sources

The current sources which are normally used in research laboratories are not suitable for low noise measurement systems because of the unacceptable level of low frequency noise which they introduce in the measurement chain. The most important source of low frequency noise in such instruments is the solid state device (usually a Zener diode) which is used as voltage reference. By using a novel c...

A New Ultra-Wideband Low Noise Amplifier With Continuous Gain Control

This paper presents a new variable gain low noise amplifier (VG-LNA) for ultra-wideband (UWB) applications. The proposed VG-LNA uses a common-source (CS) with a shunt-shunt active feedback as an input stage to realize input matching and partial noise cancelling. An output stage consists of a gain-boosted CS cascode and a gain control circuit that moves the high resonant frequency to higher freq...

Ultra Low Cost Linear Testing

The advent of high quality PC based instruments, combined with the normal day to day skills of linear test engineers, eliminates the need for general purpose linear testers in many cases. Linear applications are dominated by custom DUT boards; therefore a few application card tricks and some PC instruments can replace the general purpose linear tester and significantly reduce cost and size with...

Ultra-Low-Cost Printed Electronics

A Transformer Noise-Canceling Ultra-Wideband CMOS Low-Noise Amplifier

Previously reported wideband CMOS low-noise amplifiers (LNAs) have difficulty in achieving both wideband input impedance matching and low noise performance at low power consumption and low supply voltage. We present a transformer noise-canceling wideband CMOS LNA based on a common-gate topology. The transformer, composed of the input and shunt-peaking inductors, partly cancels the noise origina...