Patent ID: 7154324

Claim:
A digital integrated circuit that operates at an operating temperature, comprising: temperature compensation circuitry that generates temperature-compensation control signals that depend on the operating temperature; and a delay chain circuit having a plurality of series-connected buffers and an associated total delay time, each buffer having an internal resistance that is adjusted by the temperature-compensation control signals from the temperature compensation circuitry to reduce dependence of the total delay time on temperature, wherein the delay chain buffers are connected in series with respective load resistors, wherein the delay chain further comprises a plurality of capacitors, each capacitor having a first electrode connected to ground and a second electrode connected to an input of a respective delay chain buffer, and wherein the first and second electrodes are separated by a non-gate-oxide dielectric, wherein the temperature compensation circuitry comprises: a bandgap reference current source that produces a current; and a resistor to which the current is applied.