白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

Main word line driver circuit

專利號
US10867661B2
公開日期
2020-12-15
申請人
Micron Technology, Inc.(US ID Boise)
發(fā)明人
Tae H. Kim; Christopher J. Kawamura
IPC分類
G11C7/22; G11C11/408; G11C11/4076
技術(shù)領(lǐng)域
word,transistor,gr0,swd,voltage,swds,volts,vnwl,nmos,vccp
地域: ID ID Boise

摘要

A main word line circuit provides a first and second row factor signals. The main word line circuit includes a pull-up circuit to drive a global word line to follow a first decoded address signal when the first row factor signal is at a first value. The main word line circuit includes an intermediate voltage circuit to drive the global word line to follow a value of the second row factor signal. A processing device drives the global word line to an active state by setting the first row factor signal to the first value when the first decoded address signal is at a high state, and drives the global word line to follow a value of the second row factor signal by setting the first row factor signal to the second value while the first decoded address signal is at the high state.

說明書

In some embodiments, when row hammer stress mitigation is desired, the RMSXDP signal remains high for a predetermined period (e.g., from time t1 to t2, see FIG. 3B) to allow for a “soft landing” for the RF voltage and thus the global word line voltage GR. As discussed below, a “soft landing” on the global word line GR also means a “soft landing” on the local word line WL to mitigate the row hammer stress between adjacent local word lines WL in a memory bank MB. To mitigate the row hammer stress, the global word line GR is stepped down to an intermediate voltage Voff prior to entering the pre-charge or standby state. This is accomplished by having the global word line GR follow the RF signal for a predetermined time period (e.g., between t1 and t2, see FIG. 3B). For example, with the RMSXDP and RFX_n signals in the high state, the output of AND gate circuit 314 remains at a high state to keep NMOS transistor 322 ON. With NMOS transistors 322, 324, and 326 all ON, the node 321 and thus the RF signal is pulled down to the voltage Voff, which can be, for example, 0.5 volts. The predetermined period that the RMSXDP signal remains high after the RMSMWP signal is set at a low state can correspond to the time period between t1 and t2. In some embodiments, when no row hammer stress mitigation is desired, the RMSXDP signal can be set to a low state at the same time the RMSMWP signal is set at a low state. When the RMSXDP signal is set to a low state, the output of AND gate circuit 314 is set low to isolate the node 321 from the voltage Voff. In addition, the output of NAND gate circuit 316 is set high to turn ON NMOS transistor 332 to pull down the node 321 to the voltage Vnwl (or e.g., Vss or some other low voltage source). As discussed above, the RFF and RF signals generated by the RF driver 310 in coordination with the ARMW and ARMWF signals can be used by MWD 300 to set the global word line voltage.

權(quán)利要求

1
微信群二維碼
意見反饋