Design and analysis of high gain CMOS transconductance amplifier for low frequency application

Kowsalya, B.; Rajaram, S.

doi:10.1109/iccs1.2017.8326006

Cited by 2 publications

(1 citation statement)

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“…Meanwhile, such structures enable the high swing of the input signal and are increasing the output voltage swing keeping both the current source and gain cascade in the saturation modes. To meet the wide bandwidth specifications, the current flowing through the output stage should be sufficient to charge and discharge the load tied there [4]. The block diagram and the SPICE simulation performed by the 14 nm FinFet technology ensures the circuit capability to operate with a higher than 250 MHz unity gain bandwidth with a 71 dB DC gain support as shown in Fig.…”

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confidence: 99%

A High Efficiency Operational Transconductance Amplifier Design With Controllable Bandwidth in the 14nm Finfet Technology

Petrosyan

Gevorgyan

Hakobyan

et al. 2021

Information Technologies, Electronics, Radio Engineering

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Operational transconductance amplifiers are high gain amplifiers with wide bandwidth. The main advantage of those circuits is their capability to drive high resistive and capacitive loads at their outputs. Due to such capability, such circuits consume high power. While in some applications where the current consumption may vary in wide ranges the self-current of those amplifiers may succeed the load current, thus decreasing the efficiency coefficient of the designs. To reduce the intrinsic current consumption without impacting the performance and functionality, a novel method of an operational transconductance amplifier output stage design is proposed in this paper. The programmable output stage, in which the output cascade can operate in two different modes using a digital control signal has been designed. As a result, the parameters of the operational amplifier become more flexible to be tuned and configured after production. The output impedance, amplifier transconductance, bandwidth and other main parameters can be easily controlled based on the system state. If the load at the output enters the power down mode, the impedance of the amplifiers decreases the current and vice versa. The solution has been tested in the modern 14nm FinFet technology and the achieved results have ensured the capability of the proposed solution to be integrated with modern analog integrated circuits.

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confidence: 99%