This letter describes a compact resistor-based temperature sensor intended for the thermal monitoring of microprocessors and DRAMs. It consists of an RC poly phase filter (PPF) that is read out by a frequency-locked loop (FLL) based on a dual zero-crossing (ZC) detection scheme. The sensor,fabricated in 65-nm CMOS,occupies 5800 μm2 and achieves moderate accuracy [±1.2 °C (3σ)] over a wide temperature range (-50 °C to 105 °C) after a one-point trim. This is 2× better than the previous compact resistor-based sensors. Operating from 0.85 to 1.3-V supplies,it consumes 32.5-μA and achieves 2.8-mK resolution in a 1-ms conversion time,which corresponds to a resolution FoM of 0.26 pJ•K2.
|Title of host publication||ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Number of pages||4|
|Publication status||Published - 1 Sep 2019|
|Event||45th IEEE European Solid State Circuits Conference, ESSCIRC 2019 - Cracow, Poland|
Duration: 23 Sep 2019 → 26 Sep 2019
|Name||ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference|
|Conference||45th IEEE European Solid State Circuits Conference, ESSCIRC 2019|
|Period||23/09/19 → 26/09/19|
- CMOS temperature sensor
- dual zero-crossing (ZC) detection
- frequency-locked loop (FLL)
- one-point trim
- RC poly phase filter (PPF)
- resistor-based temperature sensor.