A technique for real-time measurement of Nth-orderderivativesdNV/dIN |
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Authors: | Swartz R.G. |
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Affiliation: | AT&T Bell Lab., Holmdel, NJ; |
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Abstract: | A technique for the measurement of device derivatives d NV/dIN of arbitrary order N described. Measurement is accomplished by injecting a test current composed of the sum of N square waves into the rest device, and then multiplying the corresponding voltage change by the product of those same square waves, followed by low-pass filtering. The algorithm is implemented in real time using a mixture of analog and digital circuitry, and its application to semiconductor laser control in high-speed optical communications is described |
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