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    • 5. 发明授权
    • Transducer combining comparator or converter function with sensor
function
    • 传感器组合比较器或转换器功能与传感器功能
    • US4206646A
    • 1980-06-10
    • US946179
    • 1978-09-27
    • Gordon B. SpellmanStanley V. JaskolskiHerman P. SchuttenRobert W. Lade
    • Gordon B. SpellmanStanley V. JaskolskiHerman P. SchuttenRobert W. Lade
    • G01D5/246G01K7/01G01K7/00
    • G01D5/246G01K7/01
    • A transducer is disclosed which provides a digital indication of a sensed analog condition without the need of an analog to digital (A/D) converter or a comparator. A condition responsive element having a true abrupt switching characteristic at a known breakover voltage as a function of a condition being sensed is biased by a voltage source preferably supplying a periodic voltage as a known function of time. The point during the voltage source cycle at which the condition responsive element switches to its other state is determined by the sensed condition. Preferably, a clock of known frequency is enabled when the condition responsive element is in one of its states, whereby clock pulses are counted during an interval whose duration is determined by the sensed condition. The number of clock pulses counted is a digital value of the analog condition being sensed because: (i) the clock frequency is known; (ii) the voltage/time relation of the voltage source is known; and (iii) the voltage/sensed condition relation of the condition responsive element is known. A thermally sensitive thyristor is specifically disclosed for the condition responsive element.
    • 公开了一种传感器,其提供感测模拟状态的数字指示,而不需要模数(A / D)转换器或比较器。 具有作为感测条件的函数的已知的断开电压具有真正的突变切换特性的条件响应元件被优选地提供作为已知时间功能的周期性电压的电压源偏置。 在状态响应元件切换到其它状态的电压源周期期间的点由感测到的条件确定。 优选地,当条件响应元件处于其状态之一时,已知频率的时钟被使能,从而在其持续时间由感测到的条件确定的间隔期间对时钟脉冲进行计数。 计数的时钟脉冲的数量是由于(i)时钟频率已知的,感测的模拟条件的数字值; (ii)电压源的电压/时间关系是已知的; 以及(iii)条件响应元件的电压/感测条件关系是已知的。 专门针对条件响应元件公开了一种热敏晶闸管。
    • 8. 发明授权
    • Amplified gate thyristor with non-latching amplified control transistors
across base layers
    • 具有非锁存放大控制晶体管的放大栅极晶闸管跨基极层
    • US4529998A
    • 1985-07-16
    • US391803
    • 1982-06-24
    • Robert W. LadeStanley V. JaskolskiHerman P. SchuttenGordon B. Spellman
    • Robert W. LadeStanley V. JaskolskiHerman P. SchuttenGordon B. Spellman
    • H01L27/06H01L29/74
    • H01L29/7428H01L27/0694
    • A diode is integrated on a common substrate with a thyristor to form a parasitic transistor in the gate circuit of the thyristor for amplifying gate current thereto. In addition, gate sensitivity is further enhanced by this formation because the injection efficiency across the thyristor anode-base junction is increased, thus reducing the amount of gate current necessary to trigger the thyristor. The diode cathode, diode anode and substrate form an emitter, base and collector, respectively, of the parasitic transistor. The junction formed by the substrate and the thyristor anode region is forward biased and supplies collector current for the parasitic transistor, this junction being inactive with respect to the junction formed by the substrate and the diode anode region. Thus gate current flowing through the diode to the gate of the thyristor is increased by the additional collector current afforded by the parasitic transistor. This parasitic transistor formation enables the use of a shorted-emitter thyristor while also achieving a high degree of gate sensitivity without the usual drawbacks of temperature and dv/dt sensitivity associated with a nonshorted-emitter high gate sensitivity thyristor.
    • 二极管集成在具有晶闸管的公共衬底上,以在晶闸管的栅极电路中形成用于放大栅极电流的寄生晶体管。 此外,由于这种形成进一步增强栅极灵敏度,因为跨越晶闸管阳极 - 基极结的注入效率增加,从而减少触发晶闸管所需的栅极电流量。 二极管阴极,二极管阳极和衬底分别形成寄生晶体管的发射极,基极和集电极。 由衬底和晶闸管阳极区形成的结正向偏置,并为寄生晶体管提供集电极电流,该结对于由衬底和二极管阳极区形成的结无效。 因此,通过由寄生晶体管提供的附加集电极电流,流过二极管的栅极电流增加到晶闸管的栅极。 这种寄生晶体管形成使得能够使用短路发射极晶闸管,同时也实现高度的栅极灵敏度,而没有与非发射极高栅极灵敏度晶闸管相关的温度和dv / dt灵敏度的常见缺点。
    • 10. 发明授权
    • Thyristor having widened region of temperature sensitivity with respect
to breakover voltage
    • 晶闸管相对于转折电压具有加宽的温度敏感区域
    • US4323793A
    • 1982-04-06
    • US94074
    • 1979-11-14
    • Herman P. SchuttenStanley V. JaskolskiGordon B. SpellmanRobert W. LadeMichael J. Schutten
    • Herman P. SchuttenStanley V. JaskolskiGordon B. SpellmanRobert W. LadeMichael J. Schutten
    • H03K17/72
    • H03K17/72
    • An external resistance is presented between the gate and cathode of a thermally sensitive thyristor which varies in accordance with a changing voltage applied across the thyristor. The changing voltage sweeps the varying external resistance through its operating range which in turn expands the region of temperature sensitivity with respect to breakover voltage by sweeping the shifting curves of switching temperature vs. gate to cathode resistance for the thyristor. In preferred form, a field effect transistor (FET) (10) is connected between the gate (8) and cathode (4) of the thermally sensitive thyristor (6) and is biased by the same voltage supply applied across the thyristor. The FET presents an external gate to cathode resistance which varies in accordance with the changing bias level on the FET, which is the same changing bias applied across the thyristor. The range of variance of this added external resistance must be between 10,000 ohms and 1 megohm. The breakover voltage of the thyristor can be made to vary slowly with respect to temperature, rather than exhibiting sharp drop in a narrow critical temperature region.
    • 在热敏晶闸管的栅极和阴极之间呈现外部电阻,其根据施加在晶闸管上的变化的电压而变化。 变化的电压通过其工作范围扫描变化的外部电阻,通过扫描晶闸管的开关温度与栅极至阴极电阻的移位曲线,从而扩展相对于分解电压的温度灵敏度区域。 在优选形式中,场效应晶体管(FET)(10)连接在热敏晶闸管(6)的栅极(8)和阴极(4)之间,并被施加在晶闸管两端的相同电源施加偏压。 FET呈现外部栅极至阴极电阻,其根据FET上改变的偏置电平而变化,这是跨晶闸管施加的相同的变化偏置。 该外加电阻的方差范围必须在10,000欧姆和1兆欧之间。 可以使晶闸管的转折电压相对于温度变化缓慢,而不是在窄的临界温度区域显示出急剧的下降。