PCM COMMUTATOR
Abstract
The PCM Commutator (pulse code modulation commutator) represents a significant advance in the state of the art in multichannel encoding. The research model employs the re-circulation technique of encoding, and is capable of performing high resolution, high accuracy analog-to-digital conversion. The unit is capable of encoding analog inputs ranging from 5 milivolts to 5 volts in ampltude and providing an output of 10 serial bits at a rate of 200,000 bit per second while mintaining an output accuracy of the order of 0.15 percent of full scale from 0 to +60 C. Although only five input channels were incorporated into the research model, the final test results indicate an actual comutator capaility of 40, or more, analog input channels, each wih the same high degree of accuracy and resolution of the research model. The unit is powered by a mercury cell power supply which, in addition to having a life expectancy of 10 hours, provides a precision reference voltage source, and is self-regulated. Provision is mde to connect the unit to external laboratory regulated supplies for extended performance testing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1961
- Accession Number
- AD0268583