Patent ID: 7974146
Filing Date: 2011-07-05
Classification: G11C

Abstract:
1. A system comprising: a processor; and a nonvolatile memory coupled to the processor, the nonvolatile memory having a floating gate transistor with a temperature dependent threshold voltage, and a temperature compensated wordline voltage supply circuit coupled to provide a wordline signal to the floating gate transistor, wherein the temperature compensated wordline voltage supply circuit includes a resistor with a temperature dependent resistance value, wherein the nonvolatile memory comprises a multi-level cell (MLC) memory, and the temperature compensated wordline voltage supply circuit comprises a first voltage reference circuit to pull-up the wordline signal to a first wordline voltage, and a second voltage reference circuit to pull-down the wordline signal to a second wordline voltage, and wherein the second voltage reference circuit includes a temperature compensated output circuit with a source follower transistor, a current source, and the resistor with the temperature dependent resistance value.