Apparatus and method for sense amplifying

摘要

A sense amplifier includes four sub-circuits: pre-charge, sense enable, sense output, and buffer. The pre-charge sub-circuit provides a voltage between zero volts and the positive power supply (denoted VDD) to the sense enable sub-circuit. The sense enable sub-circuit is configured to adjust the received voltage based on the sensed value of bit lines and sends the adjusted voltage to the sense output sub-circuit. The sense output sub-circuit removes interference, inverts and amplifies the adjusted voltage, and sends an output voltage to the buffer sub-circuit. The buffer sub-circuit amplifies the output voltage of the sense output sub-circuit and provides it to an output bus.

主权项

1. A sense amplifier comprising:
a pre-charge sub-circuit configured to provide a pre-charge voltage to a sense enable sub-circuit, wherein said pre-charge voltage is a voltage between zero volts and the voltage of a positive power supply node; said sense enable sub-circuit configured to sense a voltage difference between a pair of bit lines to which the sense enable sub-circuit is coupled, to adjust the received pre-charge voltage based on said voltage difference between the pair of bit lines, and to output the adjusted voltage to a sense output sub-circuit; and said sense output sub-circuit configured to receive the adjusted voltage via a coupling capacitor and to invert and to amplify said adjusted voltage.