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Isolated Logarithmic Amplifier Using High-Linearity Optocouplers


Logarithmic amplifiers with its log functionality are useful for compressing wide dynamic range signals whereby the measured quantities are in decibels (dB) and they are used in a wide variety of applications such as video, medical, test and measurement system. Logarithmic amplifiers can be built to a compact, easy to use and cost effective circuits suitable for certain analog designs.

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