This report describes the development of a transimpedance amplifier that takes current as input and gives voltage as output. The amplifier consists of three CMOS amplifier stages in a fed-back configuration, achieving a transimpedance gain over 3 kΩ and a 3-dB bandwidth greater than 2.8 GHz. The amplifier operates with a 1.5 V supply voltage and a power budget of 30 mW.

A telescopic cascode opamp typically has a higher frequency capability and consumes less power than other topologies. The disadvantage of a telescopic opamp is severely limited output swing. In a conventional telescopic opamp shown in Figure 1, all transistors are biased in the saturation region. Transistors M1-M2, M7-M8 and the tail current source M9 must have at least Vds,sat to offer a good ...

For the analog-to-digital conversion lab, we need a resetable ramp generator. Here, we explore building a ramp generator from a current source. We implement a current source using an operational amplifier (Op Amp or OA) and then using a PNP transistor; the single-ended PNP source is used in the lab.

A new ripple feedback filter is presented for Analog/Digital mixed-mode amplifier (MMA) among audio applications. MMA is composed of two amplifiers: one is analog amplifier responsible for high fidelity and the other is digital switching amplifer in charge of high efficiency. To improve both total harmonic distortion (THD) and efficiency, passive RLC filter is needed at the output side of the d...

The tradition of implementing analogue circuits by means of voltage amplifiers is almost as old as the concept of electronic circuit design. The integrated electronic circuit, however, is a relatively new concept. Furthermore, integrated electronic circuits have significantly different limitations and strengths to the conventional discrete electronic circuits have. Since the active devices in i...

An essential modification to a conventional four-stage pseudo-class AB amplifier results in a true class AB amplifier. As opposed to the conventional pseudoclass AB scheme, which uses a current mirror in the third stage, our work uses an adaptive biasing circuit in the third stage in order to drastically reduce quiescent current. The pseudo-class AB and new class AB amplifiers are designed in a...

In this paper a high resistant EMI interference CMOS operational amplifier has been designed and simulated. It is designed by implementing easy modification of the differential pair with active current load. The power amplifier seems to be leading the output voltage power with respect to the input supply given, the two stage power amplifier was designed in this current technology and results ar...

Sense amplifiers are one of the very important peripheral components of CMOS memories. In a Hybrid Sense amplifier both current and voltage sensing techniques are used which makes it a better selection than a conventional current or voltage sense amplifiers. The hybrid sense amplifier works in three phases-Offset cancellation (200ps), Access phase (500ps) and Evaluation phase. The offset cancel...

A 5GHz low power consumption LNA has been designed here for the receiver front end using 90nm CMOS technology. The ‘current reuse’ technique has been used here to reuse the bias current for two amplifier stages stacked upon each other. An inverter type amplifier acts the second stage to a common source first stage thereby giving a good gain for the amplifier. The gain achieved is around 13dB wi...

This is a brief update on our experimental work towards better one-molecule-thick monolayer rectifiers of electrical current, and on theoretical progress towards a one-molecule amplifier of electrical current. This program aims to provide electronic devices at the 2 to 3 nm level, as a dramatic advance towards practical integrated circuits of the future.