Moving-coil loudspeakers generally provide a substantial improvement in linearity when current driven, together with the elimination of voice-coil heating effects. Consequently there is a need to investigate low-distortion power amplifier topologies suitable for this purpose. After considering established current feedback approaches, a novel method using a common-base isolation stage is outline...

A micromachined chemical amplifier was successfully used to perform the polymerase chain reaction (PCR) in continuous flow at high speed. The device is analogous to an electronic amplifier and relies on the movement of sample through thermostated temperature zones on a glass microchip. Input and output of material (DNA) is continuous, and amplification is independent of input concentration. A 2...

This paper presents an ultra low noise instrumentation based on a standard BiCMOS SiGe 0.35 μm ASIC operating at cryogenic temperatures. The main functions of the electronic circuit are the readout and the multiplexing of SQUIDs/TES. We report the cryogenic operation of the ASIC dedicated to the readout of a 2x4 pixel demonstrator array. We particularly emphasize on the development and the test...

This paper deals with the design of low power low noise neural signal amplifier for Epileptic Seizure Prediction. The advent of Micro-electro Arrays has driven the need for implantable electronic circuitry to detect those Extracellular neural signals (ENG). We proposed a preamplifier of fully differential Low Noise Amplifier (LNA) with gm boosting in order to enhance the gain as well as reduce ...

A novel technique for a self-equalized distributed amplifier is presented by showing the analogy between transversal filters and distributed amplifier topologies. The appropriate delay and gain coefficients of amplifier circuit are obtained by a Fourier expansion of the raised cosine spectrum in the frequency range of 0-40GHz.

A CMOS realization of the current-feedback differential difference amplifier (CFDDA) is proposed. The CFDDA circuit is realized using a wide input range dependent load transconductor (DTA) with three independent input voltages and a rail to rail classAB voltage buffer. The CFDDA circuit is used to realize a MOS-C oscillator suitable for VLSI. PSpice simulation results for the CFDDA circuit and ...

This application note presents isolation amplifier circuit designs useful in industrial, instrumentation, medical, and communication systems. It covers the IL300’s coupling specifications, and circuit topologies for photovoltaic and photoconductive amplifier design. Specific designs include unipolar and bipolar responding amplifiers. Both single ended and differential amplifier configurations a...

In this paper a new method for the design of a linear phase distributed amplifier in 180nm CMOS technology is presented. The method is based on analogy between transversal filters and distributed amplifiers topologies. In the proposed method the linearity of the phase at frequency range of 0-50 GHz is obtained by using proper weighting factors for each gain stage in cascaded amplifier topology....

In recent years, CDMA has been recognized as one of the most efficient and reliable schemes for cellular radio communications. The CDMA scheme was adopted as a new wireless communication industry standard, IS-95,1 by the Electronic Industries Association (EIA) and the Telecommunications Industry Association (TIA) in 1993 and possesses several distinct advantages:2 The spectral density is reduce...