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    • 33. 发明授权
    • Back electro-motive force (BEMF) commutation and speed control of a three-phase brushless DC (BLDC) motor
    • 三相无刷直流(BLDC)电机的反电动势(BEMF)换向和速度控制
    • US07795828B2
    • 2010-09-14
    • US12056755
    • 2008-03-27
    • Robert ProctorKevin P. KingYashvant Jani
    • Robert ProctorKevin P. KingYashvant Jani
    • H02P6/18
    • H02P6/182H02P6/21
    • A DC motor comprises a stator having at least three windings coupled to a neutral point; a first pair of upper and lower switches for driving a first winding of the at least three windings to a first voltage or in tristate; a second pair of upper and lower switches for driving a second winding of the at least three windings to a second voltage or in tristate; a third pair of upper and lower switches for driving a third winding of the at least three windings to a third voltage or in tristate, one of the first, second or third windings being in tristate; a back electro-motive force (BEMF) signal generation circuit coupled to receive a BEMF voltage from the winding in tristate; a comparator coupled to receive the BEMF voltage and a zero-crossing voltage representing the voltage at the neutral point at a predetermined time and for comparing the BEMF voltage and the zero-crossing voltage to generate a comparison result; a zero-crossing voltage generation circuit to output the zero-crossing voltage to the comparator; and a commutation controller coupled to receive the comparison result and a speed control signal and for using the comparison result and the speed control signal to generate complementary pulse width modulated (PWM) control signals, one of the complementary PWM control signals for controlling an upper switch and the other of the complementary PWM control signals for substantially simultaneously controlling a lower switch.
    • 直流电动机包括具有至少三个耦合到中性点的绕组的定子; 用于将所述至少三个绕组的第一绕组驱动到第一电压或三态的第一对上和下开关; 用于将所述至少三个绕组的第二绕组驱动到第二电压或三态的第二对上和下开关; 用于将所述至少三个绕组的第三绕组驱动到第三电压或三态的第三对上和下开关,所述第一,第二或第三绕组中的一个处于三态中; 反电动势(BEMF)信号产生电路,被耦合以在三态中从绕组接收BEMF电压; 比较器,其耦合以接收所述BEMF电压和表示在预定时间处的中性点处的电压的过零电压,并用于比较所述BEMF电压和所述过零电压以产生比较结果; 过零电压产生电路,用于将过零电压输出到比较器; 以及耦合以接收比较结果和速度控制信号的换向控制器,并且为了使用比较结果和速度控制信号来产生互补的脉宽调制(PWM)控制信号,所述互补PWM控制信号之一用于控制上部开关 以及用于基本上同时控制下部开关的互补PWM控制信号中的另一个。
    • 38. 发明申请
    • METHOD FOR PLACING ELECTROSTATIC DISCHARGE CLAMPS WITHIN INTEGRATED CIRCUIT DEVICES
    • 在集成电路设备中放置静电放电封装的方法
    • US20060075368A1
    • 2006-04-06
    • US10711633
    • 2004-09-29
    • Lu'ay BakirCiaran BrennanJoseph KozhayaRobert Proctor
    • Lu'ay BakirCiaran BrennanJoseph KozhayaRobert Proctor
    • G06F17/50G06F9/45
    • G06F17/5072
    • A method for placing electrostatic discharge clamps within integrated circuit devices is disclosed. A region is initially defined within an integrated circuit design. A list of ESD-susceptible circuits located within the defined region is then generated. The center of gravity of the ESD-susceptible circuits located within the defined region is located. Next, an ESD protection device is placed at the center of gravity of the ESD-susceptible circuits located within the defined region. A determination is made as to whether or not all ESD-susceptible circuits within the list of ESD-susceptible circuits are protected by the placement of the ESD protection device. If so, the process is repeated in other regions until the entire integrated circuit is addressed. Otherwise, the defined region is divided into at least two smaller regions and the process is repeated.
    • 公开了一种在集成电路器件内放置静电放电钳的方法。 最初在集成电路设计中定义了一个区域。 然后产生位于限定区域内的ESD敏感电路的列表。 位于限定区域内的ESD敏感电路的重心位于该位置。 接下来,将ESD保护装置置于位于限定区域内的ESD敏感电路的重心处。 确定ESD敏感电路列表内的所有ESD敏感电路是否通过ESD保护装置的放置来保护。 如果是这样,则在其他区域重复该过程,直到整个集成电路被寻址。 否则,将定义的区域划分为至少两个较小的区域,并重复该过程。