Resistor-based Temperature Sensors In Cmos Tech... -
Resistor-based oscillators (where the frequency is modulated by resistance changes) allow for direct time-to-digital conversion, simplifying the analog-to-digital interface. Challenges and Trade-offs
Utilizing the back-end-of-line (BEOL) metal layers provides a very stable, albeit lower, TCR, making them useful for specific high-stability requirements. Resistor-based Temperature Sensors in CMOS Tech...
The TCR is not perfectly linear over wide ranges (e.g., -40°C to 125°C). Designers must implement compensation circuits, often using a combination of resistors with opposite temperature coefficients, to "flatten" the error curve. Applications and Future Outlook Resistor-based Temperature Sensors in CMOS Tech...
High-ohmic polysilicon resistors can be fabricated in a smaller footprint than the multi-transistor arrays required for high-accuracy BJT sensing. Resistor-based Temperature Sensors in CMOS Tech...