一个125 MHz-86 dB的IM3可编程增益放大器

2002 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.02CH37302) Pub Date : 2002-06-13 DOI:10.1109/VLSIC.2002.1015035

Cheng-Chung Hsu, Jieh-Tsorng Wu

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引用次数: 9

摘要

采用0.35 /spl mu/m CMOS技术实现了数字可编程增益放大器(PGA)。恒定带宽和高线性度是通过使用具有电阻网络反馈的电流模式放大器实现的。PGA的电压增益从0 dB到19 dB不等，带宽为125 MHz。在1 Vpp输出时，PGA的三阶互调(IM3)在10 MHz时为-86 dB，在80 MHz时为-59 dB。失真对增益变化也不敏感。该电路从3.3 V电源耗散21兆瓦。

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A 125 MHz-86 dB IM3 programmable-gain amplifier

A digitally programmable-gain amplifier (PGA) is realized using a 0.35 /spl mu/m CMOS technology. Constant bandwidth and high linearity are achieved by using a current-mode amplifier with resistor-network feedback. The PGA has a voltage gain varying from 0 dB to 19 dB with a bandwidth of 125 MHz. With 1 Vpp output, the third-order intermodulation (IM3) of the PGA is -86 dB at 10 MHz and -59 dB at 80 MHz. The distortion is also insensitive to the gain change. The circuit dissipates 21 mW from a 3.3 V supply.

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来源期刊

2002 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.02CH37302)

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