A High-Performance OTA with Hybrid of Inverter-Based OTA and Nauta OTA for High Speed Applications

Fu, Ximing; El‐Sankary, Kamal; Yin, Yadong

doi:10.1109/iscas51556.2021.9401323

Cited by 4 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, several inverter-based OTAs have been proposed in the literature. The Nauta transconductor has been presented for the first time in 1992 [8] and it has been recently expoited in [9] and [10] to implement fully differential OTAs for high speed applications. However, it has to noted that most of the inverter-based implementations available in the literature, require custom-defined inverters to reach reasonable performance under PVT and mismatch variations.…”

Section: Introductionmentioning

confidence: 99%

A Novel Differential to Single-Ended Converter for Ultra-Low-Voltage Inverter-Based OTAs

2022

View full text Add to dashboard Cite

For the design of inverter-based OTAs with differential input and single-ended output, the differential to single-ended (D2S) converter is a key building block. In fact, the performance of the D2S strongly affects the overall common-mode rejection ratio (CMRR) and input common-mode range (ICMR) of the whole OTA. In recent literature, inverter-based OTAs rely on a D2S topology based on an inverter driving another inverter with the input and output tight together which behaves as a "diode" connected device to implement a voltage gain approximately equal to −1. However, since this approach is based on the matching of the inverters, the performance of this D2S results sensitive to PVT variations if the bias point of the inverters is not properly stabilized. In this paper we present a novel topology of inverterbased D2S converter, exploiting an auxiliary, standard-cell-based, error amplifier and a local feedback loop. The proposed D2S, compared to the conventional one, exhibits higher CMRR, improved ICMR and better robustness with respect to PVT variations. We present also an ULV, standard-cell-based OTA, which exploits the proposed D2S converter and shows excellent performance figures of merit with low area footprint.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Differential to Single-Ended Converter for Ultra-Low-Voltage Inverter-Based OTAs

2022

View full text Add to dashboard Cite

show abstract

A Novel High Performance Standard-Cell Based ULV OTA Exploiting an Improved Basic Amplifier

Sala,

Centurelli,

Scotti

2024

IEEE Access

View full text Add to dashboard Cite

In this paper we introduce an improved standard-cell-based voltage amplifier cell with low output resistance. The proposed amplifier cell exhibits a voltage gain whose value can be accurately set by the number of paralleled inverters, and its output static voltage is well controlled through a replica bias approach. A three-stage fully synthesizable OTA architecture exploiting the improved voltage amplifier is also proposed. The OTA has been designed referring to the standard-cell library of a 180nm CMOS technology with a supply voltage of 0.3V and a nominal power consumption of only 6.63 nW, and exhibits a dc-gain of 73.5 dB with a gain-bandwidth-product of 9.63 kHz. A comparison against the state of the art of ultra-low-voltage OTAs has shown that the proposed amplifier exhibits the best value of the small signal figures of merit.

show abstract

CMOS Design of a Memristor Emulator: Model, Simulation and Results

Calderón,

Reyes,

Arriaga

2023

2023 20th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE)

View full text Add to dashboard Cite

A High-Performance OTA with Hybrid of Inverter-Based OTA and Nauta OTA for High Speed Applications

Cited by 4 publications

References 11 publications

A Novel Differential to Single-Ended Converter for Ultra-Low-Voltage Inverter-Based OTAs

A Novel Differential to Single-Ended Converter for Ultra-Low-Voltage Inverter-Based OTAs

A Novel High Performance Standard-Cell Based ULV OTA Exploiting an Improved Basic Amplifier

CMOS Design of a Memristor Emulator: Model, Simulation and Results

Contact Info

Product

Resources

About