Comparative study of low voltage OTA designs

Majumdar, Deyasini

doi:10.1109/icvd.2004.1260901

Cited by 4 publications

(4 citation statements)

References 5 publications

(11 reference statements)

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“…To validate our OTA design, several OTAs proposed in the literature are listed in Table 1 for the comparison purpose. Those include a highly linear tunable OTA designed in CMOS 0.5 lm technology [7], a single output OTA designed in CMOS 0.35 lm technology [8], and a current tunable OTA designed in CMOS 0.35 lm technology [9]. The performance results of the previous OTAs in Table 1 are obtained from simulation, while both simulation and measurement results of our proposed OTA are included in the last two columns of the table.…”

Section: Experimental Results Of the Otamentioning

confidence: 99%

A highly linear bulk-driven CMOS OTA for continuous-time filters

Zhang

El-Masry

2008

Analog Integr Circ Sig Process

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In this paper we present a bulk-driven CMOS triode-based fully balanced operational transconductance amplifier (OTA) and its application to continuous-time filters. The proposed OTA is linearly tunable with the feature of low distortion and high output impedance. It can achieve wide input range without compromising large transconductance tuning interval. Using a 0.18 lm n-well CMOS process, we have implemented a third-order elliptic low-pass filter based on the proposed OTA. Both the simulation and measurement results are reported. The total harmonic distortion is more than -45 dB for fully differential input signals of up to 0.8 V peak-peak voltage. A dynamic range of 45 dB is obtained under the OTA noise integrated over 1 MHz.

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Section: Experimental Results Of the Otamentioning

confidence: 99%

A highly linear bulk-driven CMOS OTA for continuous-time filters

Zhang

El-Masry

2008

Analog Integr Circ Sig Process

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“…Therefore, the non-uniformity must be considered in the neuron circuit design to improve the fidelity and robustness of operations to the environment. For the purpose, as OTA is applicable for ADC owing to its genuinely large output gain [27], [28], it can be introduced in designing a neuron circuit.…”

Section: Strategies In Designing the Neuron Circuitmentioning

confidence: 99%

A Compact Integrate-and-Fire Neuron Circuit Embedding Operational Transconductance Amplifier for Fidelity Enhancement

et al. 2023

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In this study, a compact CMOS integrate-and-fire (I&F) neuron circuit embedding an operational transconductance amplifier (OTA) has been designed for enhancing the fidelity in output generation. The OTA block in the neuron circuit allows for maintaining stability in I&F functions even under high-frequency operation conditions. The designed neuron circuit consists of OTA circuit, membrane capacitor, inverter, and reset MOSFET, from which the area occupancy is approximated to be 22 × 43 µm 2 . Featuring the simple and compact structure, the proposed neuron circuit shows the capability to control the firing frequency by adjusting the amplitude and temporal width of the synaptic pulse, resulting in high fidelity in I&F function. Series of circuit simulations have been performed to validate the systematic operations of the neuron circuit by HSPICE presuming the 0.35-µm Si CMOS technology. Moreover, temperature dependence was also investigated so that the robustness and stability of the neuron circuit at elevated operation temperatures were verified. The results provide a practical way of designing a compact and reliable neuron circuit working with the synaptic devices having deviations in operation characteristics in the hardware-oriented spiking neural network (SNN).INDEX TERMS Integrate-and-fire neuron circuit, operational transconductance amplifier (OTA), fidelity, circuit simulation, stability, hardware-oriented spiking neural network (SNN).

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“…As the characteristic lengths of CMOS devices are scaled down, both their channel delays and capacitive parasitic are reduced, which increases the cut off frequencies of the transistors. The CMOS 0.18-μm technology with fMAX up to 40 GHz has been well commercialized [18], and 0.13-μm, 90-nm, 65-nm, and even 45-nm technologies are also available to researchers, all with much higher fMAX than the 0.18-μm technology [19], [20]. These submicron and deepsubmicron advanced technologies offer significant potential for various OTAs to be implemented at RF and even microwave frequencies.…”

Section: Comparative Analysis Of Cmos Otamentioning

confidence: 99%

Untitled

2012

IOSRJVSP

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The Operational Transconductance amplifiers are significant building blocks for different analog circuits and systems which were previously implemented by using OPAMP. Recently, research is going on for implementing OTA circuits which will be highly linear, consumes lesser power and operate at lower supply voltage. Previous OTAs seldom worked over 200MHz whereas, the higher frequency OTA can be used as basic building block in several RF as well as microwave applications. The performance analysis of conventional OTA techniques and suggesting the topology, using advanced process technology that can break the previous frequency barrier is a key objective of this paper. Study and Analysis of different OTA topologies has been done. The appropriate topology is suggested which has a perfect balance between complexity and performance. The research includes analysis and comparison of OTA topologies from the point of view of effect of technology scaling on various performance parameters such as transconductance, supply voltage, Power consumption, dc gain, Frequency range, etc.

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Comparative study of low voltage OTA designs

Cited by 4 publications

References 5 publications

A highly linear bulk-driven CMOS OTA for continuous-time filters

A highly linear bulk-driven CMOS OTA for continuous-time filters

A Compact Integrate-and-Fire Neuron Circuit Embedding Operational Transconductance Amplifier for Fidelity Enhancement

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