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    • 69. 发明授权
    • Differential delay cell with common delay control and power supply
    • 具有通用延迟控制和电源的差分延迟单元
    • US06351191B1
    • 2002-02-26
    • US09584565
    • 2000-05-31
    • Rajendran NairStephen R. Mooney
    • Rajendran NairStephen R. Mooney
    • H03B524
    • H03B5/24H03K3/011H03K3/0231H03K5/133H03K2005/00032H03K2005/00208H03L7/0995
    • A differential delay cell includes load transistors and a current source transistor biased linearly. The delay control input of the differential delay cell is also the power supply input such that when the power supply voltage changes, the delay in the differential delay cell changes. The resistance presented by the load transistors changes as a function of the power supply voltage, as does the current sourced by the variable current source. The combination of changing resistance and changing current as the power supply voltage changes results in a substantially constant output voltage swing. A ring of differential delay cells is included in a voltage controlled oscillator, which is in turn included in a phase lock loop. The phase lock loop has a wide loop bandwidth and the voltage controlled oscillator has a good power supply rejection ratio.
    • 差分延迟单元包括负载晶体管和线性偏置的电流源晶体管。 差分延迟单元的延迟控制输入也是电源输入,使得当电源电压变化时,差分延迟单元中的延迟变化。 由负载晶体管提供的电阻随着电源电压的变化而变化,与可变电流源的电流一样。 随着电源电压变化,电阻变化和电流变化的组合导致基本恒定的输出电压摆幅。 差分延迟单元的环包括在压控振荡器中,其又包括在锁相环中。 锁相环具有宽环路带宽,压控振荡器具有良好的电源抑制比。