scholarly journals Design and Implementation of High Gain, High Unity Gain Bandwidth, High Slew Rate and Low Power Dissipation CMOS Folded Cascode OTA for Wide Band Applications

2015 ◽  
Vol 04 (02) ◽  
Author(s):  
Vadodaria MU Patel R Popat J

This paper presents the idea of analog amplifier which amplifies the amplitude of the real time EEG signals. This amplifier is for the front end application in brain signal measurement applications. In this paper instrumentation amplifier has been used for the designing purpose. The parameters of the proposed amplifier have been analyzed in order to achieve better gain and less power dissipation. The parameters like voltage, slew rate, gain bandwidth product, and sizing of Mosfet have been analyzed to achieve high gain using Cadence Virtuoso Software.


2014 ◽  
Vol 23 (02) ◽  
pp. 1450022
Author(s):  
XIAO ZHAO ◽  
HUAJUN FANG ◽  
JUN XU

A low power current recycling constant-gm rail-to-rail (RtR) OTA is presented. The proposed amplifier has the benefit of delivering the same performance while consuming half the power compared to the conventional RtR amplifier. This is achieved by recycling the bias current of idle devices, which results in an enhanced transconductance, gain and slew rate. The proposed amplifier was implemented in CSMC standard 0.18 um CMOS process. Simulation results show that the proposed amplifier achieves 10.2 MHz unity-gain bandwidth, 59.4 dB DC gain, 4.8 V/us slew rate and less than 8% deviation in transconductance, but the power consumption reduced by 50% compared to the conventional RtR amplifier with the same design specifications.


2013 ◽  
Vol 389 ◽  
pp. 573-578
Author(s):  
Ming Xin Song ◽  
Yue Li ◽  
Meng Meng Xu

A high-gain folded cascode operational amplifier is presented. Structure of folded cascode operational amplifier and manual calculations are discussed in detail. Folded cascode structure for the input stage is adopted. Folded cascode structure can increase the gain and the value of PSRR. Folded cascode structure can also allow self-compensation at the output. The operational amplifier is designed in 0.35μm CMOS process with 5V power supply. The operational amplifier has high-gain and work steadily. The results of SPICE simulations are shown that the operational amplifier achieved dc gain of 110dB with unity-gain bandwidth of 74.3MHz and phase margin of 54.4 degree.


2019 ◽  
Vol 8 (1) ◽  
pp. 96-106 ◽  
Author(s):  
Syed Umira R Qadri ◽  
Zubair A Bangi ◽  
Mohammad Tariq Banday ◽  
Ghulam Mohiuddin Bhat

2014 ◽  
Vol 4 (3) ◽  
pp. 9-13
Author(s):  
M. Balaji ◽  
◽  
B. Keerthana ◽  
K. Varun ◽  
◽  
...  

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