| 摘要 |
PURPOSE: A column redundancy control circuit is provided to use a cell used as a parity bit as a column redundancy cell to increase the usability of the device. CONSTITUTION: The circuit includes the first logic operator(10), the second logic operator(20) and the third logic operator(30). The first logic operator receives an enable signal and a column address, performs logic operation on the received signal and address and forms a path of a column address used for a parity bit. The second logic operator receives the inverted enable signal and the column fuse address, performs logic operation on the received signal and address and forms a path of a column fuse address used for parity bit. The third logic operator receives the outputs of the first and second logic operators, performs logic operation on the received outputs and outputs a signal corresponding to a column address for parity bit or a column redundancy address.
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