order tunable low-pass continuous time filter for fiber optic receivers
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United States of America Patent
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Dec 14, 2010
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app pub date -
Aug 28, 2008
filing date -
Aug 28, 2008
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Abstract
According to one embodiment of the invention, a circuit comprising a plurality of operational transconductance amplifiers (OTAS) is described. The first OTA has differential input and differential output. The second OTA also has differential input, where a first output of the first OTA is coupled to the first differential input of the second OTA, which is an inverting input. A second output of the first OTA is coupled to the second input of the second OTA, which is a non-inverting input. The first differential output being coupled to a first input of the first OTA and the second differential output being coupled to a second input of the first OTA for negative feedback and current biasing.
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