The P-300 had a digital sine wave stored in memory, which it passed through a digital to analog converter and then amplified to 117V ( adjustable ) at a frequency of 60 Hz ( adjustable ).
12.
"' Brooktree "'was an American company founded in 1983 by Henry Katzenstein to commercialize a faster hardware architecture for digital to analog converters, three to eight times faster than the converters then on the market.
13.
Modern electronic tuners also use varactor diodes as the actual tuning elements, but the voltages which change their capacitance are obtained from a digital to analog converter ( DAC ) driven by a microprocessor or phase locked loop ( PLL ) arrangement.
14.
The current itself is applied using current sources, either a single current source switched between electrodes using a multiplexer or a system of voltage-to-current converters, one for each electrode, each controlled by a digital to analog converter.
15.
A 16-channel digital to analog converter unit generates the 16 oscillator signals ( 8 voices of polyphony with 2 oscillators per voice ), being fed into the analog processing unit built around 8 VCF / VCA chips, each of them being controlled by voltages generated from the 63B03 processor board.
16.
Early products included : the GDP / 2A Graphics Display processor with high speed vector generator capable of drawing in excess of 50, 000 vectors at 60 Hz refresh rates; a CVD / 2 Color Video Display System that displayed a full color raster scanned image with a unique data compression algorithm capable of full frame animation display; ADA-16 Analog to Digital and Digital to Analog converters for high fidelity music and speech research, and a UMB-11 Unibus Monitor that was a low-cost test instrument for PDP-11 series minicomputers.
