AN ANALOG PHOTORESISTIVE MULTIPLIER.
Abstract
An inexpensive, yet accurate, analog multiplier producing seven products of a common variable has been developed and tested successfully. The device utilizes resistance variations in an array of eight photoresistive cells illuminated by a single incandescent lamp, the light level of which is controlled by the common multiplier. Three specific configurations are discussed in this report; two are four-quadrant multipliers and the third is a two-quadrant multiplier. The use of the latter in analog division is also treated. Static accuracies for the three configurations range from 0.1 percent to 0.25 percent relative to full-scale plus or minus 10 volts. The cell history, voltage, and temperature characteristics and the frequency response of the cell and lamp are discussed in detail. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0638816
Entities
People
- Mark E. Connelly
Organizations
- Massachusetts Institute of Technology