| Main Title |
Response Linearization of a Diode Detector Type Radio Frequency Electric Field Probe. |
| Author |
Ali, Joseph S. ;
Anderson, George ;
Bailey, E. Baker ;
|
| CORP Author |
Health Effects Research Lab., Research Triangle Park, NC. ;Northrop Services, Inc., Research Triangle Park, NC. |
| Year Published |
1982 |
| Report Number |
EPA-600/J-82-025; |
| Stock Number |
PB83-223735 |
| Additional Subjects |
Bioinstrumentation ;
Probes ;
Electric fields ;
Signal processing ;
Linearization
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB83-223735 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
An EPROM-based linearization circuit with a resolution of 0.1 percent of full scale has been designed to linearize the response of an orthogonal dipole electric field probe terminated with diodes. Design approach, performance, and probe characteristics are discussed. The nonlinear transducer response is first modeled with a fourth-order polynomial which fits the log-transformed calibration data. The equation is then evaluated at discrete points determined by the memory size and the A/D converter resolution. The antilog of the dependent variable is loaded into an EPROM memory for subsequent readout with a D/A converter and summing network. The response of other nonlinear transducers can be linearized by this method. |
