A wideband variable gain amplifier (VGA) design is introduced with two different schemes. It is based on a fully differential amplifier with resistive loads, and a Negative Miller Capacitance technique is used to increase the bandwidth of the amplifier. The amplifier consists of three stages, and the gain is varied through the second and third stages, where they are degenerated by a voltage con...

Growing interest in the electrical properties of living organisms has required the development of amplifiers sufficiently sensitive and stable to record the minute changes in potential encountered. Such amplifiers must be of high gain, with differential input (so that several amplifiers may be used simultaneously on one specimen), freedom from voltage drift, and should be direct coupled through...

This paper presents an implementation of open loop and closed loop control of Quadratic boost converter using PID controller.  Quadratic boost converter consists of boost converter and fly back converter driven by a single switch. Quadratic boost converter QBC is designed especially for regulating the DC interface between various micro sources and dc-ac inverter to electricity grid. Quadratic b...

A substrate isolated LDO for an inductively powered retinal implant to generate a negative substrate voltage of −2V out of a more negative rectified voltage down to −7V is presented. Due to the fact that the negative rectified input voltage is negative relative to substrate, the LDO has to be completely isolated against substrate. The LDO has an Open Loop Gain of 66dB and a PSRR of −81dB at low...

RATIONALE Recurrent ventricular arrhythmias after initial successful defibrillation are associated with poor clinical outcome. OBJECTIVE We tested the hypothesis that postshock arrhythmias occur because of spontaneous sarcoplasmic reticulum Ca release, delayed afterdepolarization (DAD), and triggered activity (TA) from tissues with high sensitivity of resting membrane voltage (V(m)) to elevat...

Received Jan 8, 2018 Revised Mar 23, 2018 Accepted Apr 11, 2018 Distributed energy source based electricity generation is an essential factor for the economic growth and development of a country. The photovoltaic, fuel cell and battery based power generation offer a high voltage gain. The DC-DC CUK converter based on both buck and boost mode of operation is proposed for high gain dc link voltag...

This paper presents the design, analysis, and simulated results of a three stage low power op-amp in a 0.25μm CMOS process technology. The op-amp overcomes the problems of cascading stages under low supply voltage by using modified active-feedback frequency compensation. This op-amp operates over a common-mode voltage (Vcm)from 0 to 0.6V, a supply voltage (Vdd) of 1.5V ±5%, a temperature range ...

Power efficiency is becoming an increasingly important design aspect for FPGAs. Recently it has been shown that well-known power minimization techniques in the ASICs such as creating supply voltage (Vdd) scalable islands of different granularity can be applied to FPGAs. However, the discrete routing architecture of FPGAs amplifies any constraint imposed on the placement stage. In this work, we ...

In this Letter, we report Ge p-i-n avalanche photodetectors (APD) with low dark current (sub 1 μA below V(R)=5  V), low operating voltage (avalanche breakdown voltage=8-13  V), and high multiplication gain (440-680) by exploiting a point defect healing method (between 600°C and 650°C) and optimizing the doping concentration of the intrinsic region (p-type ~10¹⁷ cm⁻³). In addition, Raman spectro...