Design of widebandwidth 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