发明授权
- 专利标题: Clock generator for integrated circuit
- 专利标题(中): 时钟发生器用于集成电路
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申请号: US10216618申请日: 2002-08-08
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公开(公告)号: US06650163B1公开(公告)日: 2003-11-18
- 发明人: Jeffrey L. Burns , Alan James Drake , Uttam Shyamalindu Ghoshal , Kevin John Nowka
- 申请人: Jeffrey L. Burns , Alan James Drake , Uttam Shyamalindu Ghoshal , Kevin John Nowka
- 主分类号: H03K300
- IPC分类号: H03K300
摘要:
A system and integrated circuit (die) including a clock generator that includes an on-chip inductor and uses the inherent capacitance of the load to generate a sinusoidal clock signal. The inductor is connected between a current source and an inverting switch. The output of the switch is a substantially sinusoidal signal that connected directly to at least a portion of the clock driven circuits without intermediate buffering. In the preferred embodiment, the clock generator is a dual phase design that includes a pair of cross-coupled MOSFET's, a pair of solid state on-chip inductors, and a current source. Each of the on-chip inductors is connected between the current source and the drain of one of the MOSFET's. The outputs of the clock generator are provided directly to the clock inputs of at least a portion of the clock driven circuits on the die. In this embodiment, the frequency of the clock generator output signal is predominantly determined by the inductance of the inductive elements and the capacitance of the clock driven circuitry. This design eliminates the need for incorporating distinct capacitor elements in the clock generator itself and produces a clock generator in which a significant portion of the power oscillates between the generator's inductive elements and the capacitive elements of the load thereby reducing the power required to be supplied by the current source.
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