Temperature compensation circuit
AssigneeIntel IP Corporation
InventorDarin Dung Nguyen
Life of this patent
Estimating the term…
Abstract
A temperature compensation circuit is disclosed. A temperature compensation circuit may include a temperature coefficient generator configured to generate a first signal and a second signal, wherein the first signal is proportional-to-absolute-temperature (ptat) and the second signal is negatively-proportional-to-absolute-temperature (ntat), a first programmable element configured to multiply at a first programmable ratio an amplitude of a third signal having a negative temperature coefficient from a first temperature to a second temperature, and a second programmable element configured to multiply at a second programmable ratio an amplitude of a fourth signal having a positive temperature coefficient from the second temperature to a third temperature.
Claims20
A temperature compensation circuit, comprising:
- a temperature coefficient generator configured to generate a proportional-to-absolute-temperature (ptat) signal and a negatively-proportional-to-absolute-temperature (ntat) signal;
- and
- a programmable temperature-coefficient combiner configured to output a temperature compensation signal having combined temperature coefficient based on a first programmable temperature coefficient across a first temperature range and a second programmable temperature coefficient across a second temperature range, the first and second programmable temperature coefficients each based on the ptat signal and the ntat signal.
A phase-locked loop (PLL), comprising:
- a voltage controlled oscillator (VCO);
- and
- a temperature compensation circuit configured to generate a temperature compensation signal to control power supply to the VCO, the temperature compensation circuit comprising:
- a temperature coefficient generator configured to generate a proportional-to-absolute-temperature (ptat) signal and a negatively-proportional-to-absolute-temperature (ntat) signal;
- and
- a programmable temperature-coefficient combiner configured to output the temperature compensation signal having combined temperature coefficient based on a first programmable temperature coefficient across a first temperature range and a second programmable temperature coefficient across a second temperature range, the first and second programmable temperature coefficients each based on the ptat signal and the ntat signal.
A method, comprising:
- generating a proportional-to-absolute-temperature (ptat) signal;
- generating a negatively-proportional-to-absolute-temperature (ntat) signal;
- and
- generating a temperature compensation signal having a combined temperature coefficient based on a first programmable temperature coefficient across a first temperature range and a second programmable temperature coefficient across a second temperature range, the first and second programmable temperature coefficients each based on the ptat signal and the ntat signal.
Dependencies are inferred from the claim text.