Square-law detector
Square-law detector the square-law behavior for detector diodes is the usual operating condition, but can only be obtained over a restricted range of input powers. If the input power is too large, small-signal conditions will not apply, and the output will become saturated and approach a linear, and then a constant, i versus p characteristic. At very low signal levels, the input will be lost in the noise floor of the device.
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Author of the text: Ed. P.A. Laplante Boca Raton: CRC Press LLC, 2000
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