Design Procedures for a Fully Differential Telescopic Cascode Two-Stage CMOS Operational Amplifier

Ren, Mingyuan; Wu, Tong; Song, Mingxin; Zhang, C.X.

doi:10.1016/j.proeng.2012.01.614

Cited by 11 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since single stage op-amp doesn"t satisfy the nominal values of the small signal voltage circuit thus they might not be able to curb the effects of non-linearity in the open loop scenario. This all leads to the mismatch in certain results which were intended [14]. Thus op-amps must exhibit wide range of phase margin in order to achieve high stability.…”

Section: Operational Amplifier For Read Out Circuitsmentioning

confidence: 99%

“…In this topology there are basically two current sources are implemented which are fighting for the domination. This topology applies the folded cascode architecture at the differential input arms with a class A structure at the outputs for the peculiar implementation of the differential amplifier in order to achieve the good input and output common mode range along with self-frequency compensation and the higher gain in comparison with the two stage op-amps [14] [15]. As we are well familiar with the fact that in order to make differential amplifier dual ended output the voltage gain of the op-amp has to be reduced to half.…”

Section: Iiiproposed Architecture and Stepsmentioning

confidence: 99%

See 1 more Smart Citation

Design of Low Power, High Gain Fully Differential Folded Cascode Operational Amplifier for Front End Read Out Circuits

Sharma¹,

Reddy²,

Bhardwaj³

et al. 2019

IJRTE

View full text Add to dashboard Cite

The Front end read out circuits are major block in the implementation of Capacitive MEMS accelerometer. Front end read-out circuits comprises of preamplifier block containing folded cascode fully differential operational amplifier which are required for the signal conditioning of the signals received from the MEMS sensors. The op-amps are prime elements in design and implementation of mixed signal integrated circuits. The high gain and low power of the designed circuits helps in the designing of high precision IC’s for numerous application. Amongst the available topologies folded cascode topology plays vital role in the design and development of low power, high gain read out circuits. This paper illustrates the design and analysis of low power, high gain fully differential Folded Cascode Operational Amplifier for front end read out circuits. The designed op-amp exhibits a power consumption or dissipation of 92.14 μW and relatively higher open loop DC gain value with a value calculated at 81.33 dB by employing folded cascode topology. The UGB and Phase Margin for the selected design are 35 MHz and 83.60 respectively. The design operates at 5V power supply with the bias current of 12.11 μA. The circuit design and simulations have been implemented using 0.18 μm CMOS technology.

show abstract

Section: Operational Amplifier For Read Out Circuitsmentioning

confidence: 99%

Section: Iiiproposed Architecture and Stepsmentioning

confidence: 99%

Design of Low Power, High Gain Fully Differential Folded Cascode Operational Amplifier for Front End Read Out Circuits

Sharma¹,

Reddy²,

Bhardwaj³

et al. 2019

IJRTE

View full text Add to dashboard Cite

show abstract

“…OTA i.e, a Voltage-Controlled Current Source, is chosen over traditional OP-AMPS due to its low output impedance with high power dissipation. Its cumulative DC gain improves as the magnitude of output conductance reduces [16][17][18][19][20]. While OTA can also be analyzed using low voltage with low power results in a device with additional battery life [21].…”

Section: Introductionmentioning

confidence: 99%

Analyzing A High Gain, Low Power OTA for Biomedical applications in 180 nm CMOS Technology

Kumar

Scholar

2022

Preprint

View full text Add to dashboard Cite

As biopotential signals are having very small frequency variations tens of Hz and micro to millivolts amplitude in the range. While acquiring biopotential signals from a human body, intrusions occur in the acquisition system. Thus for acquiring noise-free signals, the enhanced Biopotential Acquisition unit having a high gain with an improved common-mode rejection ratio readout front-end is designed. To solve mentioned issues, a Fully Differential Two-Stage OTA is introduced in this paper to achieve high DC gain and high Unity-gain frequency. Operational Transconductance Amplifier operates at ± 0.2 V supply voltage, the bias current of 20µA, and achieves a high gain of 74dB. The design comprises a frequency compensation structure by connecting a capacitor across a high voltage stage and the load capacitor is connected across output by following the relation of CC > 0.22 CL. The proposed high gain stage achieves additional gain with reduced noise of 0.2 mV/\(\sqrt{\text{H}\text{z}}\) with a minimal power consumption of 1.9 nW. The analog readout front-end is executed using 180 nm CMOS Technology and utilizes less power, making it ideal for battery-powered devices in Biopotential Acquisition systems.

show abstract

“…The vibration signal caused by fault parts would spread through lots of components to be received by the sensors. During the process of spreading, the strength of vibration will decay and lots of noise will be added, which makes it harder to extract characteristic values [2]. In this paper, the on-shaft sensors are located near the gear fault source while rotating with the shaft.…”

Section: Introductionmentioning

confidence: 99%

A Wireless Vibration Sensor System Based on Shaft Synchronous Measurement for Gear Fault Diagnosis

Yu¹,

Zhou²,

Zhu³

2017

dtmse

View full text Add to dashboard Cite

Abstract. Traditional fault diagnosis methods place vibration sensors on the surface of the equipment. The fault signals are affected by different vibration components through the transmission path. In this paper, the vibration sensors are placed on the rotating shaft inside the equipment, under the situation we establish a new gear fault synchronization vibration model and process a serial of on-shaft experiments to verify the correctness of the model for fault diagnosis.

show abstract

Design Procedures for a Fully Differential Telescopic Cascode Two-Stage CMOS Operational Amplifier

Cited by 11 publications

References 8 publications

Design of Low Power, High Gain Fully Differential Folded Cascode Operational Amplifier for Front End Read Out Circuits

Design of Low Power, High Gain Fully Differential Folded Cascode Operational Amplifier for Front End Read Out Circuits

Analyzing A High Gain, Low Power OTA for Biomedical applications in 180 nm CMOS Technology

A Wireless Vibration Sensor System Based on Shaft Synchronous Measurement for Gear Fault Diagnosis

Contact Info

Product

Resources

About