Monolithic DC-to-120-MHz Log-amp is Stable and Accurate

AD640 Provides Total Calibration over Wide Temperature Ranges; Can Be Paired for up to 95-dB Dynamic Range

The AD640 is a monolithic laser-trimmed multi-stage logarithmic amplifier ("log amp")–a complete, calibrated measurement system comprising five 10-dB stages with paralleled current outputs that produce a device output precisely proportional to the logarithm of the input voltage. Deviating only ±0.6 dB from the ideal function, the AD640 is designed from the outset to exhibit high stability with temperature through the use of accurate nonlinear-circuit design principles. Read full article


Barrie Gilbert

Barrie Gilbert

Barrie Gilbert是首位ADI院士,他“付出了毕生精力追求模拟技术的真谛。”他于1972年加入ADI公司,于1979年获封ADI院士,负责管理位于俄勒冈州比佛顿的西北实验室。Barrie于1937年出生于英国伯恩茅斯。在加入ADI公司之前,1954年,他在SRDE工作,研发第一代晶体管,之后加盟Mullard, Ltd.;后来还曾在Tektronix和Plessey研究实验室工作。Barrie是一名IEEE院士(1984年),一生获奖无数。他拥有约50项专利,发表过约40篇论文,与人合作出版多本著作,还是几家期刊的评审人。1997年,他获得了美国俄勒冈州立大学颁发的工程荣誉博士学位。


Bob Clarke