| 摘要 |
A device (1) provides an electrically settable resistance, and comprises first (3) and second (5) electrodes. Each electrode (3, 5) comprises a redox active material. The device (1) further comprises means (6, 7) defining an environment for each electrode (3, 5) such that the average redox state of the electrodes (3, 5), taken, remains substantially constant. The environment defining means (6, 7) includes an electrolyte (7) between the electrodes (3, 5). The device (1) further comprises a pair of terminals (9, 11) electrically connected to the first electrode (3) at spaced-apart locations, the electrically settable resistance being defined between the pair of terminals (9, 11), and being a function of the oxidation state of the first electrode (3). The device (1) further comprises means, including a terminal (13, 15), electrically connected to the second electrode (5), for defining a control circuit path, including the first (3) and second (5) electrodes and the electrolyte (7), to enable a control current flowing through the control circuit path to change the oxidation state of the first electrode (3) so that the control current flowing in one direction sets the resistance to a lower value and control current flowing in the opposite direction sets the resistance to a higher value. |
