[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