Subthreshold biased enhanced bulk-driven double recycling current mirror OTA

Deo, Nikhil; Sharan, Tripurari; Dubey, Tanmay

doi:10.1007/s10470-020-01689-8

Cited by 24 publications

(10 citation statements)

References 36 publications

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“…The comparison in Table 5 shows that the proposed amplifier provides a trade-off between small-signal and large-signal FOMs in the state of the art. The OTAs in [28,36,44] present higher values for the small-signal FOMs; however, their large-signal performance is not optimized. The authors of [44] also used a higher supply voltage; nevertheless, their FOM S in Equation (27) was lower than the OTA in this work.…”

Section: Results and Comparison With The Literaturementioning

confidence: 99%

“…The OTAs in [28,36,44] present higher values for the small-signal FOMs; however, their large-signal performance is not optimized. The authors of [44] also used a higher supply voltage; nevertheless, their FOM S in Equation (27) was lower than the OTA in this work. The topology in [28] is made up of an Arbel-like body-driven pseudo-differential input stage followed by a dual-path differential-to-single-ended converter with gain, and the resulting OTA is compensated by a Miller capacitance.…”

Section: Results and Comparison With The Literaturementioning

confidence: 99%

“…Large transistor widths and lengths were used to reduce the contributions of thermal and flicker noise, which represent a crucial issue in body-driven amplifiers [21,39,44]. In fact, larger devices have lower narrow-and short-channel effects, lower flicker noise, and larger body transconductance, which are useful for ULV and ULP applications.…”

Section: Sizingmentioning

confidence: 99%

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A 0.3 V Rail-to-Rail Ultra-Low-Power OTA with Improved Bandwidth and Slew Rate

Centurelli

Sala

Monsurrò

et al. 2021

JLPEA

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In this paper, we present a novel operational transconductance amplifier (OTA) topology based on a dual-path body-driven input stage that exploits a body-driven current mirror-active load and targets ultra-low-power (ULP) and ultra-low-voltage (ULV) applications, such as IoT or biomedical devices. The proposed OTA exhibits only one high-impedance node, and can therefore be compensated at the output stage, thus not requiring Miller compensation. The input stage ensures rail-to-rail input common-mode range, whereas the gate-driven output stage ensures both a high open-loop gain and an enhanced slew rate. The proposed amplifier was designed in an STMicroelectronics 130 nm CMOS process with a nominal supply voltage of only 0.3 V, and it achieved very good values for both the small-signal and large-signal Figures of Merit. Extensive PVT (process, supply voltage, and temperature) and mismatch simulations are reported to prove the robustness of the proposed amplifier.

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Section: Results and Comparison With The Literaturementioning

confidence: 99%

Section: Results and Comparison With The Literaturementioning

confidence: 99%

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A 0.3 V Rail-to-Rail Ultra-Low-Power OTA with Improved Bandwidth and Slew Rate

Centurelli

Sala

Monsurrò

et al. 2021

JLPEA

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“…Thus, P 5 and P 6 are simultaneously bulk and source-driven and offer twofold of transconductance. The drain currents of P 5 is fed to two parallel path, αi 1 parts into SC-current mirror CM 1 and βi 1 parts into PPF SC-composite pair transistors N 7 and N 7C to ensure current starving which, further, enhances transconductance by 1/(1 − K), i.e., four times as stated in block-level descriptions [19,36,37]. The same is applied for right part of the input pair.…”

Section: Circuit Schematic Of Current Mirror Bulk-driven Mo-otamentioning

confidence: 99%

Low-Power MISO Biquadratic Filter and Diode-Less Full Wave Rectifier Using CM-BD-MO-OTA for Bio-signals

Sharan

Richa

2021

Lecture Notes in Electrical Engineering

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“…Thus, body-driven (BD) OTAs have become more popular over the years. Indeed, BD amplifiers employ the bulk as an input terminal to achieve rail-to-rail input common-mode range (ICMR) and at the same time a well-defined bias point, thanks to gate biasing [27][28][29][30][31][32][33][34]. However, BD-OTAs aren't suitable for switching applications, due to their input impedance.…”

Section: Introductionmentioning

confidence: 99%

A Novel OTA Architecture Exploiting Current Gain Stages to Boost Bandwidth and Slew-Rate

et al. 2021

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A novel architecture and design approach which make it possible to boost the bandwidth and slew-rate performance of operational transconductance amplifiers (OTAs) are proposed and employed to design a low-power OTA with top-of-class small-signal and large-signal figures of merit (FOMs). The proposed approach makes it possible to enhance the gain, bandwidth and slew-rate for a given power consumption and capacitive load, achieving more than an order of magnitude better performance than a comparable conventional folded cascode amplifier. Current mirrors with gain and a push–pull topology are exploited to achieve symmetrical sinking and sourcing output currents, and hence class-AB behavior. The resulting OTA was implemented using the 130 nm STMicroelectronics process, with a supply voltage of 1 V and a power consumption of only 1 µW. Simulations with a 200 pF load capacitance showed a gain of 92 dB, a unity-gain frequency of 141 kHz, and a peak slew-rate of 30 V/ms, with a phase margin of 80°, and good noise, PSRR and CMRR performance. The small-signal and large-signal current and power FOMs are the highest reported in the literature for comparable amplifiers. Extensive parametric and Monte Carlo simulations show that the OTA is robust against process, supply voltage and temperature (PVT) variations, as well as against mismatches.

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Subthreshold biased enhanced bulk-driven double recycling current mirror OTA

Cited by 24 publications

References 36 publications

A 0.3 V Rail-to-Rail Ultra-Low-Power OTA with Improved Bandwidth and Slew Rate

A 0.3 V Rail-to-Rail Ultra-Low-Power OTA with Improved Bandwidth and Slew Rate

Low-Power MISO Biquadratic Filter and Diode-Less Full Wave Rectifier Using CM-BD-MO-OTA for Bio-signals

A Novel OTA Architecture Exploiting Current Gain Stages to Boost Bandwidth and Slew-Rate

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