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    • 1. 发明授权
    • Drive scheme for a plurality of flourescent lamps
    • 多个荧光灯的驱动方案
    • US4525649A
    • 1985-06-25
    • US633667
    • 1984-07-23
    • William C. KnollDavid L. Bay
    • William C. KnollDavid L. Bay
    • H05B41/295H05B39/00
    • H05B41/295Y10S315/02Y10S315/07
    • The above and other objects, advantages and capabilities are achieved in one aspect of this invention by a drive scheme for a plurality, that is, for N, where N-2, flourescent lamps. The drive circuit comprises (N+1) pairs of output terminals, each comprising associated first and second individual terminals. An output transformer is coupled at one end to the (0,1).sup.1 terminal and at another end to the (0,1).sup.N+1 terminal. N impedance elements, typically capacitors, are coupled across associated pairs of lamp filaments in a fashion whereby each impedance element is coupled at one end to the second terminal of one pair and at another end to the second terminal of the succeeding pair. To wit: The first impedance element is coupled between the second terminal of the first pair, and the N.sup.th element is coupled between the second terminal of the N.sup.th pair and the second terminal of the (N+1).sup.th pair. The impedance elements, in whatever form, are characterized by a lower impedance than the lamps prior to ignition and a greater impedance subsequent ignition. As a result, the cathodes are heated prior ignition and power consumption of same is minimized subsequent ignition.
    • 上述和其它目的,优点和能力在本发明的一个方面通过用于多个,即N,其中N-2个荧光灯的驱动方案来实现。 驱动电路包括(N + 1)对输出端子,每个输出端子包括相关联的第一和第二单独端子。 输出变压器的一端耦合到(0,1)1端子,另一端耦合到(0,1)N + 1端子。 通常,N个阻抗元件(通常是电容器)以相关联的灯丝对耦合,从而每个阻抗元件在一端耦合到一对的第二端并在另一端耦合到后一对的第二端。 第一阻抗元件耦合在第一对的第二端子之间,第N个元件耦合在第N对的第二端子与第(N + 1)对的第二端子之间。 阻抗元件以任何形式,其特征在于比点火之前的灯阻抗低,随后点燃更大的阻抗。 结果,阴极在点火之前被加热,并且其功率消耗在随后的点火时被最小化。
    • 2. 发明授权
    • Output circuit for an electronic ballast system
    • 电子镇流器系统的输出电路
    • US4532456A
    • 1985-07-30
    • US646479
    • 1984-08-31
    • William C. KnollDavid L. Bay
    • William C. KnollDavid L. Bay
    • H02M7/5383H05B41/282H05B37/02
    • H05B41/2825H02M7/53832Y10S315/07
    • The above and other objects, advantages and capabilities are achieved in one aspect of the invention by an output circuit for an electronic ballast system. The circuit includes N sets of output connections for accepting N lamps. The lamps are driven by an output autotransformer coupled to the lamps through a feedback winding that is used to apply a feedback signal to an inverter drive circuit. Capacitive impedances are coupled across the lamps so that the capacitances, the lamp filaments, the feedback winding, and the output transformer form a circuit loop. The capacitances are chosen to have an impedance, at the inverter operating frequency, less than the pre-ignition impedance of the lamps and greater than the post-ignition impedance.
    • 通过电子镇流器系统的输出电路在本发明的一个方面中实现了上述和其它目的,优点和能力。 该电路包括N组用于接收N个灯的输出连接。 这些灯由耦合到灯的输出自耦变压器通过用于将反馈信号施加到逆变器驱动电路的反馈绕组驱动。 电容阻抗耦合在灯之间,使得电容,灯丝,反馈绕组和输出变压器形成电路回路。 电容被选择为具有在逆变器工作频率下的阻抗小于灯的预先点火阻抗并且大于后点火阻抗。
    • 6. 发明授权
    • Easily encodable surface acoustic wave (SAW) security devices
    • 易于编码的表面声波(SAW)安全装置
    • US5115160A
    • 1992-05-19
    • US399126
    • 1989-08-28
    • William C. KnollJames R. McCollJames O. Lawson
    • William C. KnollJames R. McCollJames O. Lawson
    • G01S13/75G08B13/24H03H9/02
    • H03H9/6406G01S13/755G08B13/2417G08B13/2425G08B13/2437
    • This invention features a method for encoding surface acousting wave (SAW) delay lines. The method uses a split-electrode transducer as a programmable reflector. When shorted out, it does not reflect surface waves. When open-circuited, it partially reflects incident surface waves. As manufactured by conventional photolithographic methods, each of several such transducers is shorted out by a fusible link. In the as-manufactured state, the array of shorted transducers produces no reflection of surface waves. If a fusible link is destroyed by passage of electric current or other means, the corresponding transducer becomes a partial reflector. The status of these switchable reflectors may be read by exciting a separate launch transducer with a burst of electromagnetic energy containing substantial energy at the basis operating frequency of the SAW transducers or at suitable harmonics. SAW energy reflected by the switchable reflectors appears at the same transducer at delay times determined by the spacing of the elements. The presence of a pulse at a given delay time indicates that the corresponding fusible link has been destroyed; conversely, absence of the pulse indicates that the fusible link is intact. Thus, destruction of fusible links provides a method for encoding SAW devices for security and other applications, in situ.
    • 本发明的特征在于一种用于编码表面声波(SAW)延迟线的方法。 该方法使用分离电极换能器作为可编程反射器。 当短路时,它不反映表面波。 当开路时,部分反映了入射面波。 如通过常规光刻方法制造的,几个这样的传感器中的每一个通过可熔链路短路。 在制造状态下,短路换能器的阵列不产生表面波的反射。 如果通过电流或其他方式破坏可熔连接,相应的传感器就成为部分反射器。 这些可切换反射器的状态可以通过在SAW传感器的基础工作频率处或在适当的谐波处激发具有包含基本能量的电磁能量的单独的发射换能器来读取。 由可切换反射器反射的SAW能量在由元件的间距确定的延迟时间出现在相同的换能器上。 在给定的延迟时间内存在脉冲表明相应的可熔链路已被破坏; 相反,不存在脉冲表示可熔链接是完整的。 因此,可熔链路的破坏提供了一种用于现场为安全性和其他应用编码SAW器件的方法。
    • 7. 发明授权
    • Dimming circuit for an electronic ballast
    • 电子镇流器的调光电路
    • US4353009A
    • 1982-10-05
    • US218311
    • 1980-12-19
    • William C. Knoll
    • William C. Knoll
    • H05B41/282H05B41/29
    • H05B41/2827Y10S315/04
    • A dimmer circuit for an inverter-driven electronic ballast system. The ballast includes an output transformer having a primary winding coupled to the inverter output and a secondary winding adapted to be coupled to a lamp filament winding for supplying power to the filament. An interstage transformer has a primary winding adapted to be coupled to a lamp filament and a secondary winding coupled to an inverter input for applying a feedback signal derived from the filament current at that input. The dimmer circuit is in the form of a feedback loop that includes a winding on the primary of the output transformer, a winding on the primary of the interstage transformer, and a variable impedance coupling those windings. Varying the impedance necessarily varies the total feedback loop impedance and therefore the amount of feedback applied at the inverter output and, inversely, the power supplied to the lamp filament.
    • 用于逆变器驱动的电子镇流器系统的调光电路。 镇流器包括具有耦合到逆变器输出的初级绕组的输出变压器和适于耦合到用于向灯丝供电的灯丝线圈的次级绕组。 级间变压器具有适于耦合到灯丝的初级绕组和耦合到反相器输入的次级绕组,用于施加从该输入处的灯丝电流得到的反馈信号。 调光电路是反馈回路的形式,其包括在输出变压器的初级绕组上的绕组,级间变压器的初级绕组以及耦合这些绕组的可变阻抗。 改变阻抗必然会改变总反馈回路阻抗,因此改变施加在逆变器输出端的反馈量,反之亦然地提供给灯丝的功率。
    • 9. 发明授权
    • High frequency switch circuit
    • 高频开关电路
    • US07202649B2
    • 2007-04-10
    • US11201567
    • 2005-08-11
    • Ross W. BirdWilliam C. KnollJohn M. Staron
    • Ross W. BirdWilliam C. KnollJohn M. Staron
    • G05F1/56
    • H02M7/538H02M3/1588H03F3/2173H03K17/08142Y02B70/1466
    • A high-frequency switch circuit is presented. The invention includes a pair of switches, a pair of inductors, and a pair of diodes. Inductors are electrically connected in series between the switches which are thereafter electrically coupled to a power source. Switches are electrically connected to gate drivers so as to control and coordinate the cycling of switches between ON and OFF states. Inductors are also electrically connected to an output thereby communicating a voltage waveform thereto. In some embodiments, it may be desired to electrically connect the inductors to an output circuit to further modify the waveform. Diodes are likewise electrically connected about the switches and inductors. The present invention is applicable to a variety of circuits having a totem pole arrangement of switches sequentially cycled ON and OFF, examples including but not limited to half-bridge, full-bridge, and hybrid configurations.
    • 提出了一种高频开关电路。 本发明包括一对开关,一对电感器和一对二极管。 电感器电连接在开关之间,然后电连接到电源。 开关电连接到栅极驱动器,以便在ON和OFF状态之间控制和协调开关的循环。 电感器也电连接到输出端,从而将电压波形传送到其上。 在一些实施例中,可能需要将电感器电连接到输出电路以进一步修改波形。 二极管同样​​电连接在开关和电感器上。 本发明可应用于具有顺序循环开关的开关的图腾柱布置的各种电路,其实例包括但不限于半桥,全桥和混合配置。