[A-9-3] 4bit A/D and 8bit D/A Converters Implemented with AlGaAs/GaAs HBTs Y. Kuriyama、M. Ishibe、M. Asaka、M. Obara、S. Shimizu (1.Toshiba Research and Development Center) https://doi.org/10.7567/SSDM.1988.A-9-3