A low-noise flexible system for the simultaneous recording and analysis of several electrical signals (EEG, ECG, EMG, and diaphragm EMG) from the same rat was constructed for studying changes in physiological functions during the sleep-wake cycle. The hardware in the system includes a multichannel amplifier, a video camera, a timer code generator, and a PC. A miniature buffer headstage with hig...

We present an ultrahigh-speed optical coherence tomography (OCT) based on an all-optical swept-source with an A-scan rate of 40 MHz. The inertia-free swept-source, which has its output power of 41.2 mW and tuning range of 40 nm and high scan linearity in wavenumber with Pearson's correlation coefficients r of 0.9996, consists of a supercontinuum laser, an optical band-pass filter, a linearly ch...

Abstract To improve the whole characteristic of LDO, a low quiescent current structure high voltage LDO with self-regulation impedance buffer and bandgap amplifier is presented in this paper. With proposed, function reference error can be achieved simultaneously, which efficiently reduce consumption. The load capacitor as small 0.47 µ F by using compensation scheme. has been implemented 0.18 m ...

Abstract—A low power 8bit 200MSPS analog-to-digital converter (ADC) is described. The prototype ADC achieves low-power consumption by time-interleaved and stage scaling technique. The pipeline stage and amplifier are designed to guarantee the PVT variation with less current. The ADC is implemented in TSMC 0.35um double-poly-triple-metal CMOS technology and achieved 47.7dB signal-to-noise and di...

This paper introduces a simple variable gain amplifier (VGA) structure that shows an inherently dB-linear gain control property. Requiring no additional components for dB-linear control, the structure is compact and power efficient. The designed two-stage VGA shows a gain control range of 60dB with the gain error in the range of ±0.4 dB. The power consumption including the output buffer is 20.4...

Abstract- A novel low-voltage two-stage operational amplifier employing resistive biasing is presented. This amplifier implements neutralization and correction common mode stability in second stage while employs capacitive dc level shifter and coupling between two stages. The structure reduces the power consumption and increases output voltage swing. The compensation is performed by simple mill...

This paper presents the development of a highly sensitive gas detection system based on resonant photoacoustic cell for detecting dissolved gases in transformer oil. A simulation model was studied and optimized buffer chamber volume while ensuring signal enhancement. The reduced by about 80% compared to classical model. then fabricated optimization. dual-resonance constructed combining PA with ...

A digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. The system is designed in Ka-band for a DVB-S2 satellite link. We use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. The six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. This approa...

A novel low noise trans-impedance amplifier is proposed using low cost 0.18 µm CMOS technology. A resistive-capacitive feedback is used to extend the bandwidth of the amplifier. As the structure is inductor less, it is suitable for low cost integrated optical interconnects. In this paper Improved Particle Swarm Optimization have applied to determine optimal trans-resistance and noise of propose...