A system includes a voltage generator, current sensing amplifiers, and a control module. The voltage generator outputs a first voltage, which is generated based on received codewords, to a first word line that communicates with N transistors each having programmable threshold voltages, where N is an integer greater than 1. The current sensing amplifiers sense currents through the N transistors via N bit lines, respectively, and generate control signals when current through a corresponding one of the N transistors is greater than or equal to a predetermined current. The control module generates measured values of the threshold voltages of the N transistors by compensating the ones of the codewords based on at least one of a position of the corresponding ones of the N transistors and a temperature.