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    • 21. 发明授权
    • Tunable on-chip capacity
    • 可调芯片容量
    • US06535075B2
    • 2003-03-18
    • US09737929
    • 2000-12-15
    • Roland FrechErich KlinkJochen Supper
    • Roland FrechErich KlinkJochen Supper
    • H03H701
    • H01L27/0805
    • The invention relates to a tunable on-chip capacity circuit for a semiconductor chip (10) mounted on a substrate (30) and including a plurality of power supply decoupling capacitors (20-23) which can be selectively activated or deactivated by being switched on or off the power supply system. An on-chip detecting circuit (32) determines a circuit specific load/unload frequency of the on-chip power supply network, and on-chip control means (28, 33) responsive to signals of the detecting circuit increases or decreases the total of the on-chip capacity (CSD) by selectively activating or deactivating power supply decoupling capacitors (20-23). Off-chip path impedances (LMC, RMC), an off-chip capacity (CM) and the total on-chip capacity (CC), including the plurality of power supply decoupling capacitors (20-23) and parasitic on-chip capacities (CP), form a resonance loop (40) which is tunable by changing the total capacity (CSD) of the on-chip power supply decoupling capacitors. By tuning the total capacity (CSD) of the decoupling capacitors a resonance condition of the resonance loop (40) is met under which a minimum of switching power noise and a minimum switching power consumption is achieved.
    • 本发明涉及一种用于半导体芯片(10)的可调片上容量电路,该半导体芯片(10)安装在基板(30)上并且包括多个电源去耦电容器(20-23),该电源去耦电容器可通过接通而被选择性地激活或去激活 或关闭供电系统。 片上检测电路(32)确定片上电源网络的电路特定的负载/卸载频率,响应于检测电路的信号的片上控制装置(28,33)增加或减少 片上容量(CSD)通过选择性地激活或去激活电源去耦电容器(20-23)。 片外路径阻抗(LMC,RMC),片外容量(CM)和片上容量(CC),包括多个电源去耦电容器(20-23)和寄生片上容量( CP)形成谐振回路(40),其可通过改变片上电源去耦电容器的总容量(CSD)来调节。 通过调谐去耦电容器的总容量(CSD),满足谐振回路(40)的谐振条件,在该谐振回路(40)的谐振条件下达到最小开关功率噪声和最小开关功耗。