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Invention Grant
US07889588B2 Circuit having gate oxide protection for low voltage fuse reads and high voltage fuse programming 有权
具有低电压熔丝读取和高压保险丝编程的栅极氧化保护电路

Circuit having gate oxide protection for low voltage fuse reads and high voltage fuse programming
Abstract:
A circuit for reading and programming a fuse. The electronic circuit includes a data fuse coupled to a data node and a reference fuse coupled to a reference node. A programming circuit is coupled to the data node, wherein the programming circuit is configured to, when activated, cause the data fuse to be programmed. A sensing circuit is configured to draw current from the data node and the reference node in order to develop a voltage differential between the data node and the reference node during a read operation. A read circuit is configured to, when activated, enable the sensing circuit to develop the voltage differential during the read operation. A protection circuit is configured to form a voltage divider within the sensing circuit during programming of the fuse.
Abstract(Chinese):

用于读取和编程保险丝的电路。 电子电路包括耦合到数据节点的数据熔丝和耦合到参考节点的参考熔丝。 编程电路耦合到数据节点，其中编程电路被配置为当被激活时使数据熔丝被编程。 感测电路被配置为从数据节点和参考节点抽取电流，以便在读取操作期间在数据节点和参考节点之间形成电压差。 读取电路被配置为当被激活时，使得感测电路在读取操作期间产生电压差。 保护电路被配置为在保险丝编程期间在感测电路内形成分压器。

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