| 摘要 |
SUCCESSIVE-APPROXIMATION ANALOG-TO-DIGITAL CONVERTER USING JOSEPHSON DEVICES A comparison means has plural Josephson devices each controlled by an analog input current and an opposing subtraction current. A subtraction means has a series circuit of Josephson devices arranged in groups, each group being switched by one of the comparison devices. The subtraction current is proportional to the number of devices switched in the series circuit. An output means has a string of Josephson devices each providing an output hit from one of the comparison devices. Fixed bias currents control the effective thresholds of the comparison devices. |
