发明名称 |
STATE RETENTION POWER GATED CELL FOR INTEGRATED CIRCUIT |
摘要 |
A state retention power gated (SRPG) cell includes a retention circuit coupled to a power gated circuit. The retention circuit stores state information of the power gated circuit before a low power period is started. A gated power supply coupled to the power gated circuit and to a first end of a power supply switch supplies a gated supply voltage to the power gated circuit during a non-low power period. A local power supply coupled to the retention circuit and to a second end of the power supply switch is coupled to the gated power supply in the non-low power period, and a non-gated power supply is coupled to the local power supply via an isolation element to isolate the non-gated power supply from the local power supply during the non-low power period, and to couple the non-gated power supply to the local power supply during the low power period. |
申请公布号 |
US2015084680(A1) |
申请公布日期 |
2015.03.26 |
申请号 |
US201414191403 |
申请日期 |
2014.02.26 |
申请人 |
Cheng Zhihong;Chen Zhijun;Du Huabin;Wang Peidong;Zhang Shayan |
发明人 |
Cheng Zhihong;Chen Zhijun;Du Huabin;Wang Peidong;Zhang Shayan |
分类号 |
H03K17/22 |
主分类号 |
H03K17/22 |
代理机构 |
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代理人 |
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主权项 |
1. An integrated circuit, comprising:
a power gated circuit (202) that is shut down during a low power period; a retention circuit (204) coupled to the power gated circuit (202) during at least a portion of the non-low power period, wherein the retention circuit (204) stores, during the low power period, state information reflecting a state of the power gated circuit (202) before the low power period started; a gated power supply (206) coupled to the power gated circuit (202) and to a first end of a power supply switch (210) for supplying a gated supply voltage to the power gated circuit (202) during a non-low power period; a local power supply (214) coupled to the retention circuit (204) and to a second end of the power supply switch (210), wherein during the non-low power period the local power supply (214) is coupled to the gated power supply (206) via the switch (210); and a non-gated power supply (208) coupled to the local power supply (214) via an isolation element (212); wherein the isolation element (212) isolates the non-gated power supply (208) from the local power supply (214) during the non-low power period, and couples the non-gated power supply (208) to the local power supply (214) during the low power period. |
地址 |
Suzhou CN |