The self-heated Darlington thermal airflow sensor

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Other Materials from the Main Document

• Article «Nonlinearities of Darlington airflow sensor and VFC compensate each other»
• Figure 1. The TO-92 junction temperature delta versus air speed at 320 mW showing the nonlinear relationship between airflow and sensor temperature
• Figure 2. The self-heated Darlington thermal airflow sensor
• Figure 3. The nonlinear VFC is shown, with U1 configured in a 555 astable topology and a V_IN resistor network, providing a solution for the previous nonlinearity
• Figure 4. The linearized VFC airflow response (blue) where the increasing rate of Hz versus fpm cancels the nonlinear effects of King's Law to yield a 1 Hz = 1 fpm calibration
• Figure 5. Konstantin Kim's Kurve
• Figure 6. The anti-log nonlinear VFC
• Figure 7. The anti-logarithmic linearization of Darlington airspeed sensor