Patent ID: 7855583

Claim:
A sense amplifier comprising: a comparator including a first input coupled to a reference voltage node, a second input coupled to a data voltage node, and an output providing a signal indicative of a difference in voltages on the reference and data voltage nodes; a first load circuit that loads a reference cell, the first load circuit comprising a first PMOS transistor including first and second terminals spaced apart with a channel there between and including a gate for controlling current in said channel, wherein the first terminal is coupled to a voltage supply, and the second terminal is coupled to the reference cell; a second load circuit coupled to the data voltage node to load a data cell, the second load circuit comprising a second PMOS transistor including first and second terminals spaced apart with a channel therebetween and including a gate for controlling current in said channel, wherein the first terminal is coupled to the voltage supply, the second terminal is coupled to the second input of the comparator and to the data voltage node, and the gate is coupled to the second terminal of the first PMOS transistor; an impedance circuit coupled to the first input, the impedance circuit comprising circuitry including one or more resistors, wherein the circuitry is configured to apply a voltage to the reference voltage node.