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    • 11. 发明授权
    • Power supply-insensitive buffer and oscillator circuit
    • 电源不敏感缓冲器和振荡器电路
    • US08604857B2
    • 2013-12-10
    • US13294025
    • 2011-11-10
    • William James Dally
    • William James Dally
    • H03H11/26
    • H03H11/265
    • One embodiment of the present invention sets forth a technique for reducing jitter caused by changes in a power supply for a clock generated by a ring oscillator of inverter devices. An inverter sub-circuit is coupled in parallel with a current-starved inverter sub-circuit to produce an inverter circuit that is insensitive to changes in the power supply voltage. When the ring oscillator is used as the voltage controlled oscillator of a phase locked loop, the delay of the inverters may be controlled by varying a bias current for each inverter in response to changes in the power supply voltage to reduce any jitter in a clock output produced by the changes in the power supply voltage. When the transistor devices are sized appropriately and the bias current is adjusted, the sensitivity of the inverter circuit to changes in the power supply voltage may be reduced.
    • 本发明的一个实施例提出了一种用于减少由逆变器装置的环形振荡器产生的时钟的电源的变化引起的抖动的技术。 逆变器子电路与电流欠压逆变器子电路并联耦合,以产生对电源电压变化不敏感的逆变器电路。 当环形振荡器用作锁相环的压控振荡器时,可以通过响应于电源电压的变化改变每个逆变器的偏置电流来控制反相器的延迟,以减少时钟输出中的任何抖动 由电源电压的变化产生。 当晶体管器件的尺寸适当并且调节偏置电流时,可以减小逆变器电路对电源电压变化的灵敏度。