Fully Differential Difference Amplifier for Low-Noise Applications

2015 ◽  
Author(s):  
Daniel Arbet ◽  
Gabriel Nagy ◽  
Martin Kovac ◽  
Viera Stopjakova
Keyword(s):  
Low Noise ◽  
Fully Differential ◽  
Differential Difference Amplifier

Fully Differential Difference Amplifier for Low-Noise and Low-Distortion Applications

2015 ◽  
Vol 25 (03) ◽  
pp. 1640019 ◽  
Author(s):  
Daniel Arbet ◽  
Gabriel Nagy ◽  
Martin Kováč ◽  
Viera Stopjaková
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Cmos Technology ◽  
Low Noise ◽  
Noise Performance ◽  
Micro Electro Mechanical Systems ◽  
Differential Signal ◽  
Fully Differential ◽  
Differential Difference Amplifier ◽  
High Dynamic

In this paper, a fully differential difference amplifier (FDDA) designed in 0.35[Formula: see text][Formula: see text]m CMOS technology is presented. The proposed amplifier reaches high dynamic range (DR) and low input referred noise. Comparison of noise performance of the proposed FDDA to an ordinary differential amplifier has been performed. Achieved results prove that the developed amplifier circuit can be advantageously used in applications that require a fully differential signal. Then, simulation results have been verified by the measurement of prototyped chips. In our work, the proposed amplifier was experimentally employed in the analog frontend of the readout interface (RI) for a Micro-Electro-Mechanical-Systems (MEMS) capacitive microphone.

scholarly journals Compact Continuous Time Common-Mode Feedback Circuit for Low-Power, Area-Constrained Neural Recording Amplifiers

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 145
Author(s):  
Joon Young Kwak ◽  
Sung-Yun Park
Keyword(s):  
Low Power ◽  
Continuous Time ◽  
Cmos Technology ◽  
Neural Recording ◽  
Low Noise ◽  
Common Mode ◽  
Passive Components ◽  
Fully Differential ◽  
Transconductance Amplifier ◽  
Differential Difference Amplifier

A continuous-time common-mode feedback (CMFB) circuit for low-power, area-constrained neural recording amplifiers is proposed. The proposed CMFB circuit is compact; it can be realized by simply replacing passive components with transistors in a low-noise folded cascode operational transconductance amplifier (FC-OTA) that is one of the most widely adopted OTAs for neural recording amplifiers. The proposed CMFB also consumes no additional power, i.e., no separate CMFB amplifier is required, thus, it fits well to low-power, area-constrained multichannel neural recording amplifiers. The proposed CMFB is analyzed in the implementation of a fully differential AC-coupled neural recording amplifier and compared with that of an identical neural recording amplifier using a conventional differential difference amplifier-based CMFB in 0.18 μm CMOS technology post-layout simulations. The AC-coupled neural recording amplifier with the proposed CMFB occupies ~37% less area and consumes ~11% smaller power, providing 2.67× larger output common mode (CM) range without CM bandwidth sacrifice in the comparison.

scholarly journals A 60 GHz fully differential LNA in 90 nm CMOS technology

2013 ◽  
Vol 6 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Andrea Malignaggi ◽  
Amin Hamidian ◽  
Georg Boeck
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Transmission Lines ◽  
Noise Figure ◽  
Design Procedure ◽  
Cmos Technology ◽  
High Gain ◽  
Low Noise ◽  
60 Ghz ◽  
Fully Differential

The present paper presents a fully differential 60 GHz four stages low-noise amplifier for wireless applications. The amplifier has been optimized for low-noise, high-gain, and low-power consumption, and implemented in a 90 nm low-power CMOS technology. Matching and common-mode rejection networks have been realized using shielded coplanar transmission lines. The amplifier achieves a peak small-signal gain of 21.3 dB and an average noise figure of 5.4 dB along with power consumption of 30 mW and occupying only 0.38 mm2pads included. The detailed design procedure and the achieved measurement results are presented in this work.

A compact power-efficient 0.5 V fully differential difference amplifier

2019 ◽  
Vol 105 ◽  
pp. 71-77 ◽  
Author(s):  
Fabian Khateb ◽  
Tomasz Kulej ◽  
Montree Kumngern ◽  
Costas Psychalinos
Keyword(s):  
Power Efficient ◽  
Fully Differential ◽  
Differential Difference Amplifier

Design of High-SNR CMOS Interface Circuit for Micro-Machined Gyroscope

2011 ◽  
Vol 483 ◽  
pp. 508-512
Author(s):  
Hai Xi Lu ◽  
Yong Ping Xu ◽  
Shou Rong Wang
Keyword(s):  
High Gain ◽  
Low Noise ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Interface Circuit ◽  
Fully Differential ◽  
Chopper Stabilization ◽  
Front End ◽  
Cascade Structure ◽  
Stabilization Technique

A CMOS integrated interface circuit for micro-machined gyroscope containing a novel front-end and 6th-order Sigma-delta modulator is presented in this paper. To reduce the noise coming from the sensor and circuit, the front-end is accomplished by a switched-capacitor architecture, which constructed by a high-gain fully-differential amplifier and improved by chopper-stabilization technique, and work under a designed charging and sampling logic scheme. A cascade 6th-order Sigma-Delta modulator is designed to get high resolution, reduce quantized error and suppress the instability brought by high-order modulator. With the cascade structure and 16-bit resolution 32 OSR, the modulator outputs 3-bits digital stream. The whole circuit is designed with AMS technique and 3.3V power consumption. The simulation result presents that the interface circuit performs a appointed under a low-noise design specification in signal band, and the SNR of the circuit achieves remarkable value of 106dB.

Sign in / Sign up

Export Citation Format

Share Document