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Oversampling A-D converter using single amplifier loop filter

✍ Scribed by Satoshi Hirano; Etsuro Hayahara

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
283 KB
Volume
83
Category
Article
ISSN
8756-663X

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✦ Synopsis

As a loop filter of an oversampling A-D converter using a 1-bit quantizer, a switched capacitor integrator suitable to implement on a monolithic IC is generally used. However, there are several problems from the points of view of reduction of power consumption and increase of operating frequency, due to the need for several integrators and to the feedthrough of the clock. In this paper, a configuration of an oversampling A-D converter using a 1-bit quantizer suitable for low-power, high-frequency operation, in which a single operational amplifier with RC elements in the loop filter is used, is discussed. A method of configuration of the loop filter and an example of third-order design are presented. By means of computer simulation and a measurement experiment with a trial circuit realized with discrete components, the operation of the proposed A-D converter is confirmed.

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Single and triple output coherence-free
Single and triple output coherence-free microwave photonic filter using a 3 × 3 collinear coupler in a Sagnac fiber loop
✍ G. Ning; P. Shum; J. Zhou 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 236 KB

## Abstract New structures that can realize single and triple output coherence‐free microwave photonic filter are presented. They are based on a Sagnac loop interferometer containing a single drive intensity modulator and a 3 × 3 collinear coupler, and no non‐reciprocal bias unit is required. Notch