AbstractChopping is a proficient way to reduce the low frequency offset and 1/f noise in amplifiers. In this paper, a low power low noise CMOS chopper amplifier is presented. It is composed of a two stage amplifier. The first stage’s high output impedance and the equivalent Miller capacitance of the second stage constitute together a low pass filter, which reduces the power consumption. The cir...

In this paper, a 10-Gb/s inductorless CMOS receiver front end is presented, including a transimpedance amplifier and a limiting amplifier. The transimpedance amplifier incorporates Regulated Cascode (RGC), active-inductor peaking, and intersecting active feedback circuits to achieve a transimpedance gain of 56 dB and a bandwidth of 8.27 GHz with a power dissipation of 35 mW. The limiting amplif...

This open-loop gain enhancement circuit in 1.2pm CMOS does not require cascode or long-channel transistors, thus maximizing output swing and input common-mode range [1,21. Since gain enhancement is achieved not by increasing output resistance, but by matching main and replica amplifiers, high effective open-loop gain is maintained even with resistive loads. This circuit can be used with any tra...

Based on a theoretical erbium-doped fiber amplifier (EDFA) model, we have proposed an application of disturbance observer(DOB) with proportional/integral/differential(PID) controller to EDFA for minimizing gain-transient time of wavelength -division-multiplexing (WDM) multi channels in optical amplifier in channel add/drop networks. We have dramatically reduced the gain-transient time to less t...

A low-power, high-gain CMOS low noise amplifier (LNA) for use as the first stage of a subsampling receiver is proposed. The performance of +96-dB voltage gain and less than 1-dB Noise Figure (NF) with very low power consumption is reported for the first time and makes it suitable for subsampling mixer with Track and Hold (T/H) circuit. The LNA contains both tuned and inductorless amplifier stag...

Two high efficiency Ku-band pHEMT power amplifier MMICs are presented in this paper. A single stage, high efficiency amplifier provides a peak power added efficiency of 57.6% with 10.5 dB associated gain and 26.5 dBm output power into a 50Ω load at 14 GHz. Additionally, a dual stage, high gain amplifier provides a peak power added efficiency of 50.4% with 19.7 dB associated gain and 27.5 dBm ou...

The Balanced Differential Amplifiers play a most important role as basic building block in instrumentation amplifier circuit. One of the characteristic of a differential amplifier, the common mode rejection ratio (CMRR) is most important. The active load used for balanced differential amplifier is going to affect differential gain, thus CMRR of the circuit. The active load used can be a diode c...

The low noise amplifier (LNA) serves as the first component of the radio frequency receiver system. The performance of LNA determines the sensitivity and selectivity of the receiver. In order to maximize performance the gain, noise figure and input matching of LNA needs to be optmized. This paper presents a 60GHz low noise amplifier on 0.13-μm standard CMOS technology designed using classical n...

Abstract—In this paper, a CMOS differential operational transresistance amplifier (OTRA) is presented. The amplifier is designed and implemented in a standard umc90-nm CMOS technology. The differential OTRA provides wider bandwidth at high gain. It also shows much better rise and fall time and exhibits a very good input current dynamic range of 50 to 50 μA. The OTRA can be used in many analog V...

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.