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    • 5. 发明授权
    • Stable frequency sawtooth oscillator
    • 稳定频率锯齿波振荡器
    • US4598259A
    • 1986-07-01
    • US678330
    • 1984-12-05
    • Walter S. Gontowski, Jr.
    • Walter S. Gontowski, Jr.
    • H03K4/502H03K3/26
    • H03K4/502
    • A sawtooth-voltage-generating oscillator has a high gain comparator circuit formed of two differentially-connected NPN transistors driven respectively by two PNP transistors that leads to a very linear ramping of the sawtooth waveform, and at the same time, provides a sawtooth voltage swing at low supply voltages that may be within no more than 1.5 volts less than that low supply voltage. This oscillator also has the capability of working in the feed forward mode in a switching mode power supply while maintaining a stable oscillation frequency over a wide range of supply voltages.
    • 锯齿电压产生振荡器具有由两个PNP晶体管分别驱动的两个差分连接的NPN晶体管形成的高增益比较器电路,这两个PNP晶体管导致锯齿波形的非常线性斜坡,同时提供锯齿波电压摆幅 在低电源电压下可能低于该低电源电压不超过1.5伏。 该振荡器还具有在开关模式电源中在前馈模式下工作的能力,同时在宽范围的电源电压下保持稳定的振荡频率。
    • 6. 发明授权
    • Two terminal integrated circuit light-sensor
    • 两端集成电路光传感器
    • US4439673A
    • 1984-03-27
    • US296748
    • 1981-08-27
    • Walter S. Gontowski, Jr.
    • Walter S. Gontowski, Jr.
    • H01L27/144H03F3/08H01J40/14
    • H03F3/08H01L27/1443
    • In a silicon integrated circuit there is formed a silicon photo-diode connected to the input of a multiple stage current-mirror amplifier. The output branch of the amplifier is connected between the two power supply terminals. When voltage is applied to the two power supply terminals the current that flows is the sum of the currents in each branch of the three stage amplifier. Since each branch current is proportional to the current "generated" by the photo-diode, the total power supply current is proportional to the ambient light intensity. Thus a small two terminal photo-conductor type sensor is made that exhibits an unusually high sensitivity that is stable with temperature.
    • 在硅集成电路中,形成连接到多级电流镜放大器的输入的硅光电二极管。 放大器的输出分支连接在两个电源端子之间。 当对两个电源端子施加电压时,流过的电流是三级放大器每个分支中的电流之和。 由于每个分支电流与光电二极管“产生”的电流成比例,因此总电源电流与环境光强度成比例。 因此,制造出具有与温度稳定的异常高灵敏度的小二端子光导体型传感器。
    • 9. 发明授权
    • Current-controlled oscillator
    • 电流控制振荡器
    • US4147996A
    • 1979-04-03
    • US894304
    • 1978-04-07
    • Walter S. Gontowski, Jr.
    • Walter S. Gontowski, Jr.
    • H03K7/06H03K3/282
    • H03K7/06
    • A pulsing oscillator employs a capacitor that is charged through a diode from a current-source circuit and repeatedly discharges through a PNP and an NPN transistor when the capacitor voltage reaches a predetermined voltage. Another transistor is connected in shunt with a diode and capacitor, and is turned on only when the first mentioned transistors turn on so as to divert the frequency controlling current from the current source away from the capacitor during the time of discharge. The output pulse width remains constant for all values of control current and large control currents may be used without risking the "latching-on" by large control currents of the transistors intended to carry the discharge current from the capacitor.
    • 脉冲振荡器采用从电流源电路通过二极管充电的电容器,并且当电容器电压达到预定电压时,通过PNP和NPN晶体管重复放电。 另一个晶体管与二极管和电容器并联连接,仅在第一个晶体管导通时导通,以便在放电期间将来自电流源的频率控制电流远离电容器转移。 对于控制电流的所有值,输出脉冲宽度保持不变,可以使用大的控制电流,而不会因为要承载来自电容器的放电电流的晶体管的大的控制电流而导致“闭锁”。
    • 10. 发明授权
    • Sensorless motor driver with BEMF mask extender
    • 无传感器电机驱动器与BEMF面罩延长器
    • US06504328B1
    • 2003-01-07
    • US08393706
    • 1995-02-24
    • Walter S. Gontowski, Jr.
    • Walter S. Gontowski, Jr.
    • H02P706
    • H02P6/182
    • A motor control circuit wherein Bemf zero crossings are sensed to provide phasing information. To avoid incorrect timing (due to detection of zero crossings which may be caused by switching noise when the power transistors switch to commutate other phases), the Bemf detection is masked. Advantageously, the Bemf detection is masked not only for the normal masking period (including an additional percentage beyond the minimum period), but is also for an additional period, if the Bemf output is not of the expected polarity.
    • 一种电机控制电路,其中感测到Bemf过零点以提供定相信息。 为了避免不正确的定时(由于检测到过电流可能是由功率晶体管切换到换向其他相位时的开关噪声引起的),Bemf检测被屏蔽。 有利地,Bemf检测不仅对于正常屏蔽周期(包括超出最小周期的附加百分比)而被屏蔽,而且如果Bemf输出不是期望的极性,则也是额外的周期。