Vanguard International Semiconductor Corporation

Yang-Sen Yeh

Po-Yuan Tang

Hsuan-Chi Su

Yu-Chuan Chang

A level shifter receives an input signal through an input terminal and converts the input signal to an output signal. The level shifter includes an input stage circuit and an output stage circuit. The input stage circuit receives the input signal. The input stage circuit includes an N-type transistor that has a gate coupled to the input terminal, a drain coupled to a first node, a source coupled to a ground, and a bulk connected to the source. The output stage circuit is coupled to an output terminal and the first node. The output stage circuit includes a P-type transistor that has a gate, a source coupled to the supply terminal, a drain coupled to the first node, and a bulk disconnected from the source. The output signal is generated at the output terminal. An inverted output signal is generated at the first node.

Level shifter

A storage device including a cell array and a disturb-free circuit is provided. The cell array includes a first cell and a second cell. The first cell is coupled to a first conductive line and a specific conductive line. The second cell is coupled to a second conductive line and the specific conductive line. The disturb-free circuit performs a first write operation on the first cell and performs a verification operation on the second cell. The verification operation determines whether data stored in the second cell is disturbed by the first write operation. In response to the data stored in the second cell being disturbed by the first write operation, the disturb-free circuit performs a second write operation.

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Baoshan, China

Yang-Sen Yeh