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Polarization independent 4-stage OTDM multiplexer using plated GRIN lens

Libo Cai1, Min Zhang, Peida Ye

  • 1Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing Universityof Posts and Telecommunications, Beijing 100876, PR China. r18xxl@gmail.com

Optics Express
|August 20, 2008
PubMed

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Design Example: Capacitance Multiplier Circuit01:20

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.