A Low-Power 3V Lowpass OTA-C Filter for Megahertz Range

被引：0
|
作者：
E. Tiiliharju
K. Koli
K. Halonen
机构：
[1] Electronic Circuit Design Laboratory,
来源：
Analog Integrated Circuits and Signal Processing | 1997年 / 12卷
关键词：
dynamic range; optimization; low-power; OTA-C;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By applying a signal-flow graph (SFG) based filter synthesis an active OTA-C topology for integration of a 5-degree elliptic lowpass (LP) filter has been designed. The dynamic range has been maximized for this single-ended OTA-C filter, which has floating capacitors. This has been done through the use of an optimizing circuit simulator. Thus low-voltage (3V) operation despite high signal amplitudes (1Vpp) has been achieved. A linearized operational transconductance amplifier (OTA) has been designed and optimized for the filter. For comparison purposes the single-ended design has been converted to a fully differential one with an additional +6dB of gain. Integrated filters realized with a 1.2 μm CMOS process have been thoroughly measured. The filters are especially applicable for mobile communications because of low power consumption.
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页码：7 / 14
页数：7
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