Abstract
Perturbation equations describing the response of hot wires and hot films operating in a simple constant temperature circuit are developed. The heat transfer model shows that at low frequencies (a( omega /Ks)12/<or=1, where omega is the perturbation frequency and a and Ks are the substrate radius and thermal diffusivity respectively) the hot film responds like a hot wire. At high frequencies (a( omega /Ks)12/>>1) the hot film rolls off at 30 dB/decade. Experimental measurements of the circuit frequency response to a voltage perturbation for both a hot film and a hot wire show good agreement with theory if the calculations use the measured probe time constants, and when thermal end losses are taken into account.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
