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Description:0.1 - 2.5 GHz, 70 dB Logarithmic Detector / Controller
Manufacturer:Analog Devices
Datasheet:PDF (715K).
Click here to download *)

The AD8313 uses a cascade of eight amplifier/limiter cells, each having a nominal gain of 8 dB and a -3 dB bandwidth of 3.5 GHz. This produces a total midband gain of 64 dB. At each amplifier output, a detector (rectifier) cell is used to convert the RF signal to baseband form; a ninth detector cell is placed directly at the input of the AD8313. The current-mode outputs of these cells are summed to generate a piecewise linear approximation to the logarithmic function. They are converted to a low impedance voltage-mode output by a transresistance stage, which also acts as a low-pass filter.

Click here to download AD8313ARMZ Datasheet
Click here to download AD8313ARMZ Datasheet
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