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公开(公告)号：US5867016A
公开(公告)日：1999-02-02
申请号：US936978
申请日：1997-09-25
CPC分类号： H02M5/2576
摘要： A duty cycle based AC power control method reduces objectionable voltage fluctuations at a frequency that causes "flicker" by shifting the frequency of actuations of controlled devices to frequencies significantly greater than and/or less than the flicker sensitive frequency. The frequency of actuations may be redistributed (1) by segmenting the devices to provide approximately equal power requirements per actuation, (2) by providing one-half cycle actuation pulses rather than one cycle actuation pulses, and/or (3) by spacing the actuations evenly over a given time period and forcing the aggregate demand to follow a slowly rising/falling envelope. The result is the minimization of power distribution at the flicker frequency.
摘要翻译： 基于占空比的AC功率控制方法通过将受控设备的致动频率移动到明显大于和/或小于闪烁敏感频率的频率，从而降低了引起“闪烁”的频率的令人不快的电压波动。 驱动频率可以重新分配（1）通过分段设备来提供大致相同的功率要求，每个致动，（2）通过提供半个周期的致动脉冲而不是一个周期的致动脉冲，和/或（3） 在一段给定的时间内均匀地驱动，迫使总需求跟随缓慢上升/下降的范围。 结果是在闪烁频率下功率分配最小化。
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公开(公告)号：US4864251A
公开(公告)日：1989-09-05
申请号：US270906
申请日：1988-11-14
申请人： Bruce K. Baur
发明人： Bruce K. Baur
摘要： A base drive compensation circuit for a power amplifier samples a fixed saturation voltage level on the output of a power transistor and couples the sampled output to an inverting input of an error amplifier having a sawtooth signal on its non-inverting input. The output of the error amplifier is a negative going signal whose duty cycle is established by the voltage level on the inverting input. The negative going signal is coupled to a switching power supply that develops a voltage which controls the base drive current to the power transistor.
摘要翻译： 用于功率放大器的基极驱动补偿电路在功率晶体管的输出上采样固定的饱和电压电平，并将采样的输出耦合到其非反相输入端具有锯齿波信号的误差放大器的反相输入端。 误差放大器的输出是负向信号，其负载周期由反相输入端的电压电平建立。 负向信号耦合到开关电源，开关电源产生控制到功率晶体管的基极驱动电流的电压。
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公开(公告)号：US4864247A
公开(公告)日：1989-09-05
申请号：US270716
申请日：1988-11-14
申请人： Bruce K. Baur
发明人： Bruce K. Baur
IPC分类号： H04N3/16 , H03K4/62 , H03K17/04 , H03K17/0412 , H04N3/18
CPC分类号： H03K17/04126 , H03K4/62
摘要： A base drive circuit for a flyback output transistor has an inductive element having series connected coils for generating a linear ramping current to the base electrode of the output transistor in response to an input pulse. A high, almost instantaneous reverse current is produced through a discharge coil that receives inductively coupled energy from the current generating coils. The ratio of the maximum input current to the discharge current is established by the number of coils generating the input current versus the number of coils in the discharge circuit. Linearity of the base drive current is maintained by dissipating any excess energy in the inductive element to ground prior to each input pulse.
摘要翻译： 用于反激式输出晶体管的基极驱动电路具有电感元件，其具有串联连接的线圈，用于响应于输入脉冲而向输出晶体管的基极产生线性斜坡电流。 通过从电流产生线圈接收电感耦合能量的放电线圈产生高的几乎瞬时的反向电流。 通过产生输入电流的线圈数与放电电路中的线圈数量来确定最大输入电流与放电电流的比率。 通过在每个输入脉冲之前将电感元件中的任何多余的能量消散到地来维持基极驱动电流的线性度。
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公开(公告)号：US4698559A
公开(公告)日：1987-10-06
申请号：US871983
申请日：1986-06-09
申请人： Bruce K. Baur , Gordon W. Meigs
发明人： Bruce K. Baur , Gordon W. Meigs
摘要： A power amplifier circuit for driving an inductive load comprises a capacitor coupled between first and second circuit nodes, a first unidirectionally-conductive device having a first terminal coupled to the first circuit node, and a transistor having its collector coupled to the second terminal of the first unidirectionally-conductive device and having its emitter coupled to the second circuit node. The direction of conduction of the first unidirectionally-conductive device is the same as the direction of conduction through the collector-emitter path of the transistor. The circuit also comprises a second unidirectionally-conductive device connected in parallel with the first unidirectionally-conductive device for conducting current in the opposite direction from the direction of conduction of the first unidirectionally-conductive device.
摘要翻译： 用于驱动感性负载的功率放大器电路包括耦合在第一和第二电路节点之间的电容器，具有耦合到第一电路节点的第一端子的第一单向导电器件，以及其集电极耦合到第二电路节点的第二端子的晶体管 第一单向导电器件，并且其发射极耦合到第二电路节点。 第一单向导电器件的导通方向与晶体管的集电极 - 发射极通路的导通方向相同。 电路还包括与第一单向导电装置并联连接的第二单向导电装置，用于沿与第一单向导电装置的导通方向相反的方向导电。
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公开(公告)号：US4430641A
公开(公告)日：1984-02-07
申请号：US262718
申请日：1981-05-11
申请人： Bruce K. Baur , John R. Ollis
发明人： Bruce K. Baur , John R. Ollis
CPC分类号： H03M1/08
摘要： A circuit including a conventional digital-to-analog converter (DAC) and a charge pump for producing an analog representation of an input waveform defined by an input digital bit stream, the analog representation being relatively free of spurious aberrations usually present in the output of a conventional DAC. The charge pump and an associated integrator are used to produce a first approximation of the input waveform and the DAC and an associated detuned slew-rate filter are used to maintain the first approximation in long-term conformance with a more accurate second approximation. Spurious aberrations in the second approximation are integrated over several steps of the input bit stream, thereby minimizing their adverse impact on the relatively true first approximation.
摘要翻译： 包括常规数模转换器（DAC）和电荷泵的电路，用于产生由输入数字位流定义的输入波形的模拟表示，该模拟表示相对没有通常存在于输出 传统DAC。 电荷泵和相关联的积分器用于产生输入波形和DAC的第一近似值，并且使用相关联的失谐压摆率滤波器来保持长期符合更准确的第二近似的第一近似。 第二近似中的杂散像差在输入比特流的几个步骤中被积分，从而最小化它们对相对真实的第一近似的不利影响。
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6.发明授权Circuit arrangement for protecting a CRT and associated circuitry from damage due to arcing 失效电路布置，用于保护CRT和相关电路免受由于电弧引起的损坏
公开(公告)号：US4706154A
公开(公告)日：1987-11-10
申请号：US798658
申请日：1985-11-15
申请人： Bruce K. Baur
发明人： Bruce K. Baur
CPC分类号： H04N3/20
摘要： A silicon controlled rectifier (SCR) is connected between a selected electrode of a CRT and a reference potential level that is negative relative to the selected CRT electrode. The SCR remains non-conductive so long as the voltage between the selected electrode and the reference potential level remains below the breakdown voltage of the SCR and the SCR's dv/dt rating is not exceeded. If the voltage between the electrode and the reference potential level increases at a rate that exceeds the threshold rate for the SCR, the SCR turns on and shorts the selected electrode to the reference potential level.
摘要翻译： 可控硅整流器（SCR）连接在CRT的选定电极和相对于所选CRT电极为负的参考电位电平之间。 只要所选择的电极和参考电位电平之间的电压保持低于SCR的击穿电压，并且不超过SCR的dv / dt额定值，则SCR保持不导通。 如果电极和参考电位电平之间的电压以超过SCR的阈值速率的速率增加，则SCR导通并将所选择的电极短路到参考电位电平。
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