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    • 10. 发明授权
    • Flexible low current oscillator for multiphase operations
    • 灵活的低电流振荡器,用于多相操作
    • US07893778B2
    • 2011-02-22
    • US12488413
    • 2009-06-19
    • Behzad MohtashemiAllen Chang
    • Behzad MohtashemiAllen Chang
    • H03B5/24H03K3/03
    • H03K3/354H03K4/502
    • An oscillator includes a reference stage and multiple phase stages. The reference stage has a reference transistor having a gate coupled to a voltage reference and a drain coupled to a reference current source. Each phase stage includes a transistor, two current sources, a capacitor, switch, inverter, and latch. The transistor has a drain coupled to a first current source, a gate coupled to a node and a source coupled to the reference transistor's source. The capacitor and switch couple between the node and ground. The second current source couples to the node. The transistor's drain couples to the inverter's input. The inverter's output couples to the latch's set input. The latch's output couples to the switch. The inverter output also couples to the reset input of a subsequent phase stage's latch. The inverter output for a last stage couples to the reset input of a first stage latch.
    • 振荡器包括参考级和多相级。 参考级具有参考晶体管,其具有耦合到参考电流源的电压参考和漏极的栅极。 每个相位级包括晶体管,两个电流源,电容器,开关,反相器和锁存器。 晶体管具有耦合到第一电流源的漏极,耦合到节点的栅极和耦合到参考晶体管源极的源极。 节点与地之间的电容和开关耦合。 第二个电流源耦合到节点。 晶体管的漏极耦合到逆变器的输入。 变频器的输出耦合到锁存器的输入。 锁存器的输出耦合到开关。 逆变器输出也耦合到后续相位级锁存器的复位输入。 最后级的逆变器输出耦合到第一级锁存器的复位输入。