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    • 52. 发明授权
    • Phase-locked loop with capacitive voltage divider for reducing jitter
    • 带有电容分压器的锁相环,用于减少抖动
    • US5889439A
    • 1999-03-30
    • US916778
    • 1997-08-20
    • Robert MeyerThomas Suwald
    • Robert MeyerThomas Suwald
    • H03L7/093H03L7/099H03L7/08
    • H03L7/093H03L7/0995
    • In a phase-locked loop comprising a phase detector (1), a loop filter (5) and a controlled oscillator (17) which are arranged on a common integrated circuit, interferences coupled into the substrate of the integrated circuit by other parts of the circuit are suppressed. In a first embodiment of the invention, this object is achieved in that the controlled oscillator (17) is preceded by a capacitive voltage divider (9) which comprises at least two capacitances (10, 12), the controlled oscillator (17) is controlled in dependence upon the output signal of the capacitive voltage divider (9), and the capacitive voltage divider (9), together with the phase detector (1), the loop filter (5) and the controlled oscillator (17) is arranged on an integrated circuit. In accordance with a second embodiment of the invention, the reduction of interference is achieved in that the controlled oscillator (17) has a differential structure and comprises at least two voltage-controlled current sources (18, 19) whose circuits are coupled to a power supply potential and to a substrate on which the integrated circuit is arranged, the controlled oscillator (17) has an output stage (20) which is arranged behind the voltage-controlled current sources (18, 19) and generates two differential digital signals in dependence upon the differential signals applied thereto, which differential digital signals are generated with a high edge steepness by means of switching between two potentials and are applied to amplifier stages (56, 57) which are arranged between power supply potential and reference potential and supply two differential output signals operating at reference potential.
    • 在包括相位检测器(1),布置在公共集成电路上的环路滤波器(5)和受控振荡器(17)的锁相环中,由集成电路的其它部分耦合到集成电路的基板中的干扰 电路被抑制。 在本发明的第一实施例中,实现这一目的在于,受控振荡器(17)之前是包括至少两个电容(10,12)的电容分压器(9),受控振荡器(17)被控制 根据电容分压器(9)的输出信号和电容分压器(9),与相位检测器(1)一起,将环路滤波器(5)和受控振荡器(17)布置在 集成电路。 根据本发明的第二实施例,实现了干扰的减少,因为受控振荡器(17)具有差分结构并且包括至少两个电压控制电流源(18,19),其电路耦合到功率 所述受控振荡器(17)具有布置在所述压控电流源(18,19)的后面的输出级(20),并且依次产生两个差分数字信号 在施加到其上的差分信号之后,通过两个电位之间的切换以高边缘陡度产生差分数字信号,并将其施加到布置在电源电位和参考电位之间的放大器级(56,57),并提供两个差分 在参考电位下工作的输出信号。
    • 59. 发明授权
    • Ultrasonic toothbrush applicator
    • 超声波牙刷涂抹器
    • US3941424A
    • 1976-03-02
    • US477306
    • 1974-06-07
    • Lewis BalamuthMichael R. RuttenRobert Meyer
    • Lewis BalamuthMichael R. RuttenRobert Meyer
    • A61C17/34A46D3/04
    • A61C17/3481
    • This invention relates to the method of manufacturing a toothbrush adapted to be mounted on an automatic toothbrush power handle, and having as a power source vibratory energy in the ultrasonic range. The manufacturing process includes that of providing a plastic brush having a head portion including a plurality of apertures and positioning a bristle cluster respectively in each aperture; and effecting a flow of the plastic in the head portion into substantially surrounding relationship of the bristles in each aperture therein, such that the plastic solidifies in adhesive relationship to the bristles to transmit the ultrasonic vibratory energy from the brush head portion to the bristles.
    • 本发明涉及适于安装在自动牙刷功率手柄上的牙刷的制造方法,并且在超声波范围内具有作为动力源的振动能量。 该制造方法包括提供具有包括多个孔的头部分并将刷毛簇分别定位在每个孔中的塑料刷; 并且将头部中的塑料流动成其中每个孔中的刷毛的基本上围绕的关系,使得塑料与刷毛的粘合关系固化,以将超声波振动能量从刷头部分传递到刷毛。