Patent ID: 8354864

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 coupled to the reference voltage node to load a reference cell; a second load circuit coupled to the data voltage node to load a data cell; an impedance circuit coupled to the first input, the impedance circuit comprising: a switch coupled to a supply voltage node; and a voltage divider coupled between the switch and ground, the voltage divider including: a first resistor including a first terminal coupled to the switch and including a second terminal coupled to the first input of the comparator; and a second resistor including a first terminal coupled to the second terminal of the first resistor and including a second terminal coupled to a ground node; and wherein the switch, when disabled, sets the impedance circuit at an impedance established by the voltage divider that is a higher impedance relative to an impedance of the impedance circuit when the switch is enabled.