Energy conversion

Abstract

Abstract Apparatus for measuring temperature or light intensity is disclosed. Potential pulses of variable frequency are impressed between the collector and emitter of a transistor whose base is open or floats electrically. The transistor is subjected to the condition being measured, the light to be measured impinging on the transistor while it is maintained at a constant temperature or the transistor being subjected to the temperature being measured while masked or while the light impinging thereon is maintained constant. The frequency of the pulses is varied so as to maintain the amplitude or shape of the pulses transmitted by the transistor constant and the measurement of the condition is derived from the frequency of the impressed pulses. Apparatus is also disclosed for converting light images into electrical signals by impinging the image, by scanning along a linear array of transistors in a monolithic solid-state element or directly on a monolithic element having a two dimensional array of transistor elements thereon.

Inventors

• 👤 William F List

Bibliographic Details