A 900 mV single-stage class-AB amplifier suitable for the Switched-Opamp technique is presented. To improve the slew-limited characteristics, a Dynamic Current Source (DCS) circuit which boosts the tail currents of the amplifier is proposed. The tail current of the proposed circuit is well defined and independent of technology parameters and supply variations. The tail current of the amplifier is 40 µA with zero differential voltages, while the maximum output current is nearly 900 µA. A single-loop 3rd order Σ-Δ modulator with the proposed amplifier was designed. For a 260 mV 15.625 kHz sinusoidal input signal, the simulated dynamic range of the modulator is 89 dB.
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Oh Jun KWON, Kae Dal KWACK, "A 900 mV Single-Stage Class-AB Amplifier for a Σ-Δ Modulator with the Switched-Opamp Technique" in IEICE TRANSACTIONS on Electronics,
vol. E92-C, no. 5, pp. 681-685, May 2009, doi: 10.1587/transele.E92.C.681.
Abstract: A 900 mV single-stage class-AB amplifier suitable for the Switched-Opamp technique is presented. To improve the slew-limited characteristics, a Dynamic Current Source (DCS) circuit which boosts the tail currents of the amplifier is proposed. The tail current of the proposed circuit is well defined and independent of technology parameters and supply variations. The tail current of the amplifier is 40 µA with zero differential voltages, while the maximum output current is nearly 900 µA. A single-loop 3rd order Σ-Δ modulator with the proposed amplifier was designed. For a 260 mV 15.625 kHz sinusoidal input signal, the simulated dynamic range of the modulator is 89 dB.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E92.C.681/_p
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@ARTICLE{e92-c_5_681,
author={Oh Jun KWON, Kae Dal KWACK, },
journal={IEICE TRANSACTIONS on Electronics},
title={A 900 mV Single-Stage Class-AB Amplifier for a Σ-Δ Modulator with the Switched-Opamp Technique},
year={2009},
volume={E92-C},
number={5},
pages={681-685},
abstract={A 900 mV single-stage class-AB amplifier suitable for the Switched-Opamp technique is presented. To improve the slew-limited characteristics, a Dynamic Current Source (DCS) circuit which boosts the tail currents of the amplifier is proposed. The tail current of the proposed circuit is well defined and independent of technology parameters and supply variations. The tail current of the amplifier is 40 µA with zero differential voltages, while the maximum output current is nearly 900 µA. A single-loop 3rd order Σ-Δ modulator with the proposed amplifier was designed. For a 260 mV 15.625 kHz sinusoidal input signal, the simulated dynamic range of the modulator is 89 dB.},
keywords={},
doi={10.1587/transele.E92.C.681},
ISSN={1745-1353},
month={May},}
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TY - JOUR
TI - A 900 mV Single-Stage Class-AB Amplifier for a Σ-Δ Modulator with the Switched-Opamp Technique
T2 - IEICE TRANSACTIONS on Electronics
SP - 681
EP - 685
AU - Oh Jun KWON
AU - Kae Dal KWACK
PY - 2009
DO - 10.1587/transele.E92.C.681
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E92-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 2009
AB - A 900 mV single-stage class-AB amplifier suitable for the Switched-Opamp technique is presented. To improve the slew-limited characteristics, a Dynamic Current Source (DCS) circuit which boosts the tail currents of the amplifier is proposed. The tail current of the proposed circuit is well defined and independent of technology parameters and supply variations. The tail current of the amplifier is 40 µA with zero differential voltages, while the maximum output current is nearly 900 µA. A single-loop 3rd order Σ-Δ modulator with the proposed amplifier was designed. For a 260 mV 15.625 kHz sinusoidal input signal, the simulated dynamic range of the modulator is 89 dB.
ER -