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首页> 外文期刊>International journal of circuit theory and applications >A robust inverter-based amplifier versus PVT for discrete-time integrators
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A robust inverter-based amplifier versus PVT for discrete-time integrators

机译:坚固耐用的基于逆变器的放大器与PVT的比较,适用于离散时间积分器

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摘要

With the reduction of the supply voltage in modern complementary metal-oxide-semiconductor technologies, and by their intrinsic class AB behavior, inverter-based amplifiers are suitable to replace classical operational transconductance amplifiers in switched capacitor circuits like sigma-delta modulators. This paper presents a new inverter-based amplifier which increases the reliability versus process, voltage, and temperature variations. A new biasing stage is proposed, which controls the bias current without losing the class AB behavior thanks to the use of biasing transistors operated in linear region and a slew rate enhancement circuit. This makes this amplifier more robust than simple inverters regarding to process, voltage, and temperature variations, reducing the worst-case bias current spread from +140% to +20%, while costing only 15% consumption increase and keeping inverter dynamic strengths.
机译:随着现代互补金属氧化物半导体技术中电源电压的降低以及其固有的AB类性能,基于逆变器的放大器适合代替sigma-delta调制器等开关电容器电路中的经典运算跨导放大器。本文提出了一种新型的基于反相器的放大器,该放大器提高了可靠性,与工艺,电压和温度变化相比。提出了一种新的偏置级,该偏置级通过使用在线性区域中工作的偏置晶体管和压摆率增强电路来控制偏置电流而不会失去AB类性能。就工艺,电压和温度变化而言,这使得该放大器比简单的逆变器更坚固,将最坏情况下的偏置电流分布从+ 140%降低至+ 20%,同时仅消耗15%的功耗,并保持了逆变器的动态强度。

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