Device and method for reading data in memory

A computing device, comprising:

• a plurality of memory elements arranged logically in rows and columns, each of the memory elements including a control terminal and a pair of current-carrying terminals and being adapted to store a weight value and generate through the current-carrying electrodes a current indicative of a product of a signal received at the control terminal and the weight value;
• a current comparator;
• a plurality of clock-gated switch devices, each coupling a column of the memory elements and the current comparator;
• and
• a reference current circuit adapted to generate a reference current of predetermined levels;
• the current comparator being connected to the reference current circuit and adapted to receive the reference current and the currents generated by memory elements of the memory circuit, to compare the reference current level to a sum of the currents generated by memory elements of the memory circuit, and to generate an output signal indicative of the result of the comparison, the reference current circuit further adapted to receive the output signal generated by the current comparator and adjust the reference current to another predetermined level depending on the signal received from the current comparator.

A method of computing, comprising:

• generating from an array of memory elements and respective input signals applied to the respective memory elements, each adapted to store a respective weight value, a first current indicative of a sum of products between the weight values stored in the respective memory elements and the respective input signals;
• generating a second current of a predetermined level;
• gating at least one of the first and second currents based on clock signal;
• comparing the levels of the first and second currents;
• adjusting the second current until it is substantially the same as the first current;
• and
• determining the level of the first current.