Analog Integrated Circuits and Signal Processing

2000

DOI: 10.1023/a:1008346026468

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Philippe Bénabès

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,

Philippe Be ́nabe grave

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et al.

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Cited by 24 publications

References 19 publications

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A 480 MHz Band-Pass Sigma Delta Analog to Digital Modulator with Active Inductor Based Resonators

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2013

Lecture Notes in Electrical Engineering

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No abstract

A 480 MHz Band-Pass Sigma Delta Analog to Digital Modulator with Active Inductor Based Resonators

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2013

Lecture Notes in Electrical Engineering

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Nyquist-criterion based design of a CT ΣΔ-ADC with a reduced number of comparators

2009

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In this paper we present a prototype continuous time Σ∆-modulator in a 0.35 µm technology. The circuit has a 6-bit internal quantizer. Through the combination of a modified architecture and comparator interpolation this high quantizer resolution is achieved with only 15 comparators. However, it turns out that this approach imposes a severe speed constraint on the analog adder circuit. The modulator consists of a 3rd order loop and special care was taken in the design of the loop filter. The presented design has two particular features. First an explicit and controlled delay of 0.25 times the sampling period is introduced in the loop. Second, the Nyquist stability criterion and the vector gain margin are adopted to design a robustly stable modulator loop filter. This way our modulator does not require any tuning or trimming of the filter coefficients. Measurement results show a Peak SNR of 82 dB and a dynamic range of 85 dB for a bandwidth of 1.5 MHz.

Top-Down Design Process for Continuous-Time Delta Sigma Modulators

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et al. 2008

2008 3rd International Conference on Design and Technology of Integrated Systems in Nanoscale Era

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This paper presents a top-down design process for continuous-time (CT) modulator. Design strategy is illustrated through a fifth-order modulator designed for Bluetooth, WiFi and WiMAX which exemplify clearly the design methodology. Numerous simulations make obvious that the formulate strategy can be successfully applied to practical problems.

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