A 0.016-mm$^{2}$ 144-$\mu$W Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With $&gt; $0.95-MHz GBW

Zhang, Yan; Mak, Pui-In; Law, Man‐Kay; Martins, Rui P.

doi:10.1109/jssc.2012.2229070

Cited by 126 publications

(38 citation statements)

References 18 publications

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“…The current amplifiers composed of M 3{4 and M 5{6 are embedded in the first stage without extra bias circuits. The first stage is full symmetry so the system offset is obviously minimized compared to active-feedback compensation [1,5]. The second stage is a common-source amplifier composed of M 11{12 , M 12 serves as the feedforward stage g mf1 .…”

Section: Circuit Implementationmentioning

confidence: 99%

“…Some applications, such as LCD driver, analog filter, demand low power amplifier that is capable of driving large capacitive loads up to nF-range [1,2]. Compared to two-stage amplifier, three-stage amplifier has attracted much attention due to its high gain, wide output swing, especially the capability of driving capacitive loads.…”

Section: Introductionmentioning

confidence: 99%

“…Even so, most of the chip area is occupied by the compensation capacitors in large-capacitive-load amplifier [3]. So various frequency compensation strategies [1,3,4,5,6,7,8,9,10] are developed to reduce compensation capacitor and lower the power consumption.…”

Section: Introductionmentioning

confidence: 99%

“…In [1,4,5], an active left-half-plane zero is generated to extend the load drivability, yet extra integrated resistor and two compensation capacitors are required. The compensation technique presented in [8] can drive ultra-large capacitive load with a small compensation capacitor, yet the systematic offset voltage incurs due to the asymmetry of the first stage.…”

Section: Introductionmentioning

confidence: 99%

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Embedded current amplifier compensation for three-stage amplifiers with large capacitive loads

Liao

Chen

Luo

et al. 2016

IEICE Electron. Express

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An embedded current amplifier compensation (ECAC) for threestage amplifiers with large capacitive loads is presented in this paper. Two current amplifiers are embedded into the first stage. The compensation capacitor is connected to the input of the current amplifier rather than the output of the first stage, which enables the non-dominant complex poles of the ECAC amplifier to be located at high frequencies for bandwidth extension; in addition, the compensation capacitor required is greatly reduced. The amplifier has been fabricated in a 0.13 µm CMOS process. When driving a 2000 pF capacitive load, the ECAC amplifier achieves 1.85 MHz gain-bandwidth product by dissipating 33.6 µW power at 1.2 V supply and using total compensation capacitance of only 0.8 pF.

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Section: Circuit Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Embedded current amplifier compensation for three-stage amplifiers with large capacitive loads

Liao

Chen

Luo

et al. 2016

IEICE Electron. Express

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“…When designing an operational amplifier (op-amp) and comparing its performance with those of other op-amps, a figure-of-merit (FoM) equation is typically used [1,2,3,4,5,6,7]. This equation is defined such that the FoM is proportional to the gain-bandwidth product (GBW) and the load capacitance, and is reciprocally proportional to the total current [1].…”

Section: Introductionmentioning

confidence: 99%

An improved figure-of-merit equation for op-amp evaluation

Yoshizawa

2015

IEICE Electron. Express

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An improved figure-of-merit (FoM) equation is proposed for opamp evaluation. This equation has a modification factor to include the effect of the phase margin, which is not considered in a conventional FoM equation. Simulation results confirm that the proposed FoM equation drastically suppresses the effect of load capacitance variations. By using the proposed FoM equation, evaluations of op-amps become more reasonable as compared with the comparisons using the conventional FoM equation.

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Symbolic factorization methodology for multistage amplifier transfer functions

Grasso

Marano

Pennisi

et al. 2015

Circuit Theory & Apps

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Summary In this paper, we discuss a symbolic simplification methodology to derive approximated factorized forms of the transfer function of multistage amplifiers in the complex frequency domain. The developed approach is useful for hand calculation and is also suitable to be implemented in symbolic computer‐aided design tools. Although the proposed methodology is mainly intended for the analysis and design of operational transconductance amplifiers, it can straightforwardly be applied to the small‐signal analysis of any analog linear circuit. Design examples are provided to verify the effectiveness of the proposed approach implemented through a Matlab function. Copyright © 2015 John Wiley & Sons, Ltd.

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A 0.016-mm$^{2}$ 144-$\mu$W Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With $> $0.95-MHz GBW

Cited by 126 publications

References 18 publications

Embedded current amplifier compensation for three-stage amplifiers with large capacitive loads

Embedded current amplifier compensation for three-stage amplifiers with large capacitive loads

An improved figure-of-merit equation for op-amp evaluation

Symbolic factorization methodology for multistage amplifier transfer functions

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