Design of wide-bandwidth analogue circuits for heat transfer instrumentation in transient tunnels
Abstract
A method for designing analogs with a logarithmic scaling of the elements is described. This uses far fewer elements for a given bandwidth than previous designs and can retain 1% accuracy even when constructed from 20% tolerance capacitors. Theoretical analysis leads to computer programs which predict the performance of any analog in the frequency domain and the time domain. A design example of a low noise analog circuit, using nine sections for a frequency range of 0.1 to 100 kHz, is given.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1981
- Bibcode:
- 1981STIN...8223512O
- Keywords:
-
- Analog Circuits;
- Broadband;
- Heat Transfer;
- Surface Temperature;
- Thin Films;
- Transient Heating;
- Turbine Blades;
- Capacitors;
- Cost Reduction;
- Equipment Specifications;
- Low Noise;
- Resistance Thermometers;
- Time Dependence;
- Wind Tunnel Apparatus;
- Fluid Mechanics and Heat Transfer