Shingo Mandai

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— This paper proposes a 128-channel column-parallel two-stage time-to-digital converter (TDC) utilizing a time difference amplifier (TDA) and shows measurement results with a 0.35um CMOS process. The 1st stage operates as a coarse TDC, the time residue which is not converted in the 1st stage is amplified by a TDA, then converted by the 2nd stage TDC. As the(More)
—This paper proposes a 128-channel column-parallel two-stage time-to-digital converter (TDC) utilizing a time difference amplifier (TDA) and shows measurement results obtained from an implementation in a 0.35-m CMOS process. The first stage operates as a coarse TDC, the time residue is amplified by a TDA, then converted by the second-stage TDC. As the gain(More)
We studied neuromorphic models of binocular disparity processing and mapped them onto a vision chip containing a massively parallel analog processor array. Our goal was to make efficient use of the available hardware while preserving the fundamental computations performed by the models. We also developed an optical fixture that used mirrors to(More)
We introduce a 4<sup>2</sup>x cascaded time difference amplifier (TDA) using differencial logic delay cells with 0.18&mu;m CMOS process. By employing differential logic cells for the delay chain instead of CMOS logic cells, our TDA has stable time difference gain (TD gain) and fine time resolution. Measurement results show that our TDA achieves less than(More)
— This paper presents a digital silicon photomultiplier based on column-parallel time-to-digital converter (TDC), so as to improve the time resolution of single-photon detection. By reducing the number of pixels per TDC, the pixel-to-pixel skew is reduced. We achieved 264 ps FWHM time resolution of single-photon detection using a 48-fold column-parallel TDC(More)