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This paper presents the design and electrical implementation of a Wilkinson analog-to-digital converter for imaging detectors based on the use of silicon photo-multiplier scintillators. A multi-channel architecture, which shares the ramp generator among the different channels, is used to maximize the sampling frequency with the minimum power consumption and silicon area. The circuit has been implemented...
This paper presents a novel design of a 12-bit multi-channel single-ramp analog-to-digital converter (ADC) for imaging detector systems. To overcome the problem of long conversion time in the classic Wilkinson ADC, a new architecture using a counter and delay line interpolations is proposed. Two 5-bit Gray counters are designed for the coarse conversion. The time interpolation using an array of five...
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