OUTPUT DRIVER AND SEMICONDUCTOR MEMORY DEVICE HAVING THE SAME
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United States of America Patent
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Issued Date -
Aug 11, 2022
app pub date -
Sep 22, 2021
filing date -
Feb 5, 2021
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Abstract
An output driver includes a pre driver including pre driving circuits, each including first and second pre pumps, and a main driver including main driving circuits, each including first and second main pumps. Each of the first and second pre pumps includes a first driving capacitor, and each of the first and second main pumps includes a second driving capacitor. During a first half cycle of a clock signal, the first pre pump and the first main pump perform a precharge operation, and the second pre pump and the second main pump perform a first driving operation, and during a second half cycle of the clock signal, the first pre pump and the first main pump perform the first driving operation, and the second pre pump and the second main pump perform the precharge operation. Capacitances of the first and second driving capacitors are different.
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