Enhanced temperature sensor

A temperature sensor, comprising:

• a current source configured to transmit an excitation signal proportional to a temperature-dependent current;
• a ring oscillator comprising inverters arranged in series configured to be supplied with the excitation signal and generate a square pulse signal with a square pulse frequency depending on the excitation signal;
• and
• a memory configured to store relation data representative of an affine relation between square pulse frequency measurements and temperatures, the temperature sensor configured to:
• acquire a first measurement of a frequency of square pulses from a square pulse signal in accordance with the temperature sensor being at a first temperature, the first measurement and the first temperature forming a first measurement point,
• acquire a second measurement of a frequency of square pulses from a square pulse signal in accordance with the temperature sensor being at a second temperature higher than the first temperature, the second measurement and the second temperature forming a second measurement point, and
• determine, from the first measurement point and the second measurement point, a temperature based on a relation data representative of an affine relation between square pulse frequency measurements and temperatures, the affine relation defined by a used proportionality coefficient modified with respect to a measured proportionality coefficient of a measured affine relation linking the first measurement point and the second measurement point.

A temperature sensor, comprising:

• a current source configured to transmit an excitation signal proportional to a temperature-dependent current;
• a plurality of ring oscillators, each ring oscillator having inverters arranged in series and configured to be supplied with the excitation signal and generate a square pulse signal with a square pulse frequency depending on the excitation signal;
• and
• a memory configured to store relation data representative of an affine relation between square pulse frequency measurements and temperatures, the temperature sensor configured to:
• determine, at a first temperature, a first measurement point based on the first temperature and a first measurement from a first square pulse signal,
• determine, at a second temperature, a second measurement point based on the second temperature and a second measurement from a second square pulse signal, the second temperature being higher than the first temperature, and
• determine a temperature based on a relation data from the first measurement point and the second measurement point, the relation data representative of an affine relation defined by a used proportionality coefficient modified with respect to a measured proportionality coefficient of a measured affine relation linking the first measurement point and the second measurement point.