Tsinghua University

Ho-Yu Chen

Meng-Fan Chang

Ping-Chun Wu

Jin-Sheng Ren

Li-Yang Hong

A dynamic differential-reference time-to-digital converter for computing-in-memory applications is controlled by a bias reference and a predetermined setting parameter, and includes a configurable main-reference selector and a plurality of time-to-digital converters. The configurable main-reference selector is configured to receive a plurality of edge-output signals, select one of the edge-output signals as a main reference and select others of the edge-output signals as a plurality of edge selected signals according to the predetermined setting parameter. One of the time-to-digital converters is configured to compare the bias reference with the main reference to output a bias multiplication-and-accumulation value, and others of the time-to-digital converters are configured to compare the main reference with the edge selected signals to output a plurality of differential multiplication-and-accumulation values. The bias multiplication-and-accumulation value and the differential multiplication-and-accumulation values are dynamically adjusted according to the bias reference and the predetermined setting parameter.

Memory array structure with dynamic differential-reference based readout scheme for computing-in-memory applications, dynamic differential-reference time-to-digital converter for computing-in-memory applications and computing method thereof

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Hsinchu, Taiwan

Ho-Yu Chen