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41.发明授权Integrated device providing current-regulated charge pump driver with capacitor-proportional current 失效集成器件提供具有电容比例电流的电流调节电荷泵驱动器公开(公告)号：US06873203B1
公开(公告)日：2005-03-29
申请号：US10689183
申请日：2003-10-20
CPC分类号： H02M3/073 , H02M2001/0045
摘要： An integrated circuit regulates current flowing from a battery to a load without requiring an external current sense resistor. The IC includes a primary charge pump; a model charge pump; a current sense circuit, a first control circuit to force a voltage level at the output of the model charge pump to be equal to a voltage level at the output of the primary charge pump; and, a second control circuit to force a model current put out by the model charge pump to be equal to a reference current. Current passing through the primary charge pump is regulated at a level established by the capacitance value of an external flying capacitor irrespective of input voltage variation of the battery power source.
摘要翻译： 集成电路调节从电池流向负载的电流，而不需要外部电流检测电阻。 IC包括主电荷泵; 型号电荷泵; 电流感测电路，将模型电荷泵的输出处的电压电平强制为等于初级电荷泵输出端的电压电平的第一控制电路; 以及将由模型电荷泵输出的模型电流强制为等于参考电流的第二控制电路。 通过主电荷泵的电流被调节到由外部飞行电容器的电容值建立的电平，而与电池电源的输入电压变化无关。
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公开(公告)号：US5861719A
公开(公告)日：1999-01-19
申请号：US878165
申请日：1997-06-18
CPC分类号： H02M3/156 , H05B33/08 , H02M2001/007 , Y02B20/325
摘要： A power supply for a capacitive load, such as an electroluminescent lamp, converts a low battery voltage to a significantly higher voltage of alternating polarity to drive the load. A desired voltage waveform is applied to the load by accumulating charge in its inherent capacitance from voltage spikes resulting from rapidly disconnecting an inductor from the battery. The maximum voltage applied to the load is maintained below a maximum by a feedback loop that monitors a reduced voltage by use of a voltage divider. The voltage divider is formed of a plurality of capacitors connected in series, the reduced voltage being monitored across one of them. The entire power supply is formed on a single integrated circuit chip, except for the inductor, battery and load.
摘要翻译： 诸如电致发光灯之类的电容性负载的电源将低电池电压转换成极高的极性电压以驱动负载。 通过将电感从电池快速断开而产生的电压尖峰积累在其固有电容中，对负载施加期望的电压波形。 施加到负载的最大电压通过使用分压器监视降低的电压的反馈环路保持在最大值以下。 分压器由串联连接的多个电容器形成，其中的一个电压被监控。 整个电源形成在单个集成电路芯片上，除了电感器，电池和负载。
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公开(公告)号：US5760571A
公开(公告)日：1998-06-02
申请号：US695922
申请日：1996-08-12
申请人： Paul W. Latham, II , Lutz A. May
发明人： Paul W. Latham, II , Lutz A. May
摘要： A power supply damping circuit (22) coupled across the leads of a power supply (20) is able to substantially damp or reduce the resonant response of the power supply and any associated noise, ringing, or oscillation produced by the power supply. The power supply damping circuit (22) provides a low value real impedance in parallel with the power supply (20) as a means of damping the power supply resonance circuit. The power supply damping circuit (22) includes a transconductance element (36) capacitively coupled across a power supply (20). A bias control (54) provides a bias current to the transconductance element (36) to set the static current of the transconductance element (36).
摘要翻译： 耦合在电源（20）的引线两端的电源阻尼电路（22）能够基本上抑制或减小电源的谐振响应以及由电源产生的任何相关的噪声，振铃或振荡。 电源阻尼电路（22）提供与电源（20）并联的低值实际阻抗作为阻尼电源谐振电路的一种手段。 电源阻尼电路（22）包括电容耦合在电源（20）两端的跨导元件（36）。 偏置控制（54）向跨导元件（36）提供偏置电流以设置跨导元件（36）的静态电流。
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44.发明授权
公开(公告)号：US5519265A
公开(公告)日：1996-05-21
申请号：US65790
申请日：1993-05-24
申请人： Paul W. Latham, II
发明人： Paul W. Latham, II
CPC分类号： H03H11/1291
摘要： An integrated circuit includes an analog-signal manipulating circuit (ASMC) such as a filter having a transfer function with a frequency response that is determined by at least one RC product. The integrated circuit also includes separately an RC oscillator. The frequency-response-determining RC products of an RC component pair in the filter and an oscillator frequency determining RC component pair in the RC oscillator are digitally programmable by an external microprocessor. The microprocessor holds the frequency of the RC oscillator fixed relative to its own crystal controlled oscillator by adjusting the programmable RC component pair of the RC oscillator. The same adjusting digital signal from the microprocessor is simultaneously applied to the programmable RC component pair(s) of the ASMC, which has the effect of stabilizing all RC component pairs and thus the ASMC frequency response. The capacitors of each RC component pair have binary-control-signal lines mutually parallel connected to each other. The microprocessor senses the frequency of the oscillator and by sending the appropriate binary control signal to the paralleled control lines to adjust the frequency of the RC oscillator to a predetermined value, the RC products of the other component pairs in the filter are adjusted to their respective predetermined values and maintained there during operation of the integrated filter circuit while subject to changes in temperature that would otherwise alter the RC products and therefore the transfer function of the ASMC.
摘要翻译： 集成电路包括诸如具有由至少一个RC乘积确定的具有频率响应的传递函数的滤波器的模拟信号操纵电路（ASMC）。 集成电路还分别包括一个RC振荡器。 滤波器中RC组件对的频率响应确定RC产品和RC振荡器中的振荡器频率确定RC分量对由外部微处理器进行数字编程。 微处理器通过调整RC振荡器的可编程RC分量对，将RC振荡器的频率相对于其自己的晶体振荡器固定。 来自微处理器的相同的调节数字信号同时应用于ASMC的可编程RC分量对，其具有稳定所有RC分量对以及因此ASMC频率响应的作用。 每个RC分量对的电容器具有互相并联的二进制控制信号线。 微处理器感测振荡器的频率，并通过将并行的控制线发送适当的二进制控制信号将RC振荡器的频率调整到预定值，将滤波器中其他分量对的RC乘积调整为相应的 预定值，并且在整合的过滤器电路的操作期间保持在那里，同时温度变化，否则将改变RC产物并因此改变ASMC的传递函数。
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公开(公告)号：US5473238A
公开(公告)日：1995-12-05
申请号：US138315
申请日：1993-10-18
摘要： A disc drive circuit includes a pair of DC busses across which are directly connected a disc actuator power amplifier and a three phase spindle motor power amplifier which may be comprised of three circuit branches, each branch having two NMOS transistors connected in series with the junction therebetween connected to one of three spindle motor terminals. A transistor switch is connected between a DC supply source and the DC busses for disconnecting the busses from the voltage source only when the supply voltage drops below a nominal operating voltage range. In one embodiment a full wave diode rectifier is also directly connected across the pair of busses and further connected to the three motor terminals, whereby when the switch is open the back e.m.f. of the free spinning spindle motor energizes the actuator amplifier enabling parking of the actuator heads. In another embodiment the drain to channel regions of the six NMOS transistors are adapted to assume the role of a full wave rectifier. In a third embodiment, added circuitry transforms the NMOS transistors into six simulated diodes to serve as a very efficient full wave rectifier only when the switch opens.
摘要翻译： 磁盘驱动电路包括一对直流总线，两个直流总线直接连接在盘驱动器功率放大器和三相主轴电机功率放大器之间，三相主轴电机功率放大器可以由三个电路分支组成，每个分支具有两个NMOS晶体管，它们与它们之间的接点串联连接 连接到三个主轴电机端子之一。 只有当电源电压低于标称工作电压范围时，晶体管开关连接在直流电源和直流总线之间，用于断开总线与电压源的连接。 在一个实施例中，全波二极管整流器也直接连接在一对总线上，并进一步连接到三个电动机端子，由此当开关打开时，后面的e.m.f. 的自由纺纱主轴电机为执行器放大器通电，从而可以停止执行器头。 在另一个实施例中，六个NMOS晶体管的漏极到沟道区域适于承担全波整流器的作用。 在第三实施例中，添加的电路将NMOS晶体管变换为六个模拟二极管，仅当开关打开时用作非常有效的全波整流器。
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46.发明授权Temperature-compensated current source for use in a hall analog magnetic-field detector 失效用于霍尔模拟磁场检测器的温度补偿电流源
公开(公告)号：US5389889A
公开(公告)日：1995-02-14
申请号：US119851
申请日：1993-09-10
申请人： Jay M. Towne , Ravi Vig , Paul W. Latham, II
发明人： Jay M. Towne , Ravi Vig , Paul W. Latham, II
摘要： A temperature-compensated current source energizes a Hall element. The current source includes a voltage divider across the DC voltage supply busses and a differential amplifier arranged as a voltage follower which develops the output voltage across a reference resistor, creating a reference current which is amplified to generate a Hall energizing current. This results in a Hall element gain which is controllable over temperature. The temperature coefficient of the resistor can be chosen to compensate for the sensitivity temperature coefficient of a Hall element powered by a constant current source. Additionally, the temperature coefficient of the resistor may be chosen to compensate for the temperature coefficient of a magnet used to generate the magnetic field which the Hall element is intended to detect. The magnitude of the Hall current, and thus the Hall element gain, is directly proportional to the magnitude of the DC voltage supply. A trimmable current amplifier is used to compensate for the effects of manufacturing tolerances on the magnitude of the Hall current.
摘要翻译： 温度补偿电流源激励霍尔元件。 电流源包括直流电压源总线上的分压器和布置为电压跟随器的差分放大器，其在参考电阻器两端产生输出电压，产生被放大以产生霍尔通电电流的参考电流。 这导致可以在温度下控制的霍尔元件增益。 可以选择电阻器的温度系数来补偿由恒流源供电的霍尔元件的灵敏度温度系数。 此外，可以选择电阻器的温度系数来补偿用于产生霍尔元件旨在检测的磁场的磁体的温度系数。 霍尔电流的大小以及霍尔元件的增益与直流电压的幅度成正比。 可调节电流放大器用于补偿制造公差对霍尔电流幅度的影响。
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公开(公告)号：US5220207A
公开(公告)日：1993-06-15
申请号：US753475
申请日：1991-09-03
IPC分类号： G05F1/56 , H03F3/345 , H03K17/082
CPC分类号： G05F1/561 , H03F3/345 , H03K17/0822
摘要： An integrated circuit chip includes a MOS driver transistor and a relatively small MOS current-monitor transistor having their sources connected to a circuit ground point and their gates connected together to a control-voltage conductor. Current through the monitor transistor flows to a DC voltage supply conductor through a field effect transistor. A differential amplifier has one input connected to the drain of the driver transistor and the other input connected to the drain of the monitor transistor. The output of the differential amplifier is connected to the gate of the field effect transistor to force the drain voltage of the monitor transistor to be equal to the drain voltage of the driver transistor. The current flowing through the small monitor transistor has a constant proportionality with the load current even as the load current approaches zero. With the addition of a differential voltage amplifier having an output connected to the control-voltage conductor, having one input connected to a circuit ground point, and the other input connected to a control-current input pad, the current from the monitor transistor is fedback via a current mirror circuit to the other input of the voltage amplifier, so that the entire circuit can be made to perform as a current amplifier, e.g. driver-load-current/input-control current. By connecting one end of an external precision resistor to the control-current-input pad of the chip and applying a control voltage to the opposite end of the precision resistor, a control current proportional to the control voltage is caused to flow through the control-circuit-input pad. The combination performs as a current amplifier.
摘要翻译： 集成电路芯片包括MOS驱动晶体管和相对小的MOS电流监视晶体管，其源极连接到电路接地点，并且其栅极连接到控制电压导体。 通过监视晶体管的电流通过场效应晶体管流到直流电压源导体。 差分放大器有一个输入端连接到驱动晶体管的漏极，另一个输入端连接到监视晶体管的漏极。 差分放大器的输出端连接到场效应晶体管的栅极，以迫使监视晶体管的漏极电压等于驱动晶体管的漏极电压。 即使负载电流接近零，流经小型监控晶体管的电流也与负载电流成比例。 通过添加具有连接到控制电压导体的输出的差分电压放大器，具有连接到电路接地点的一个输入，以及连接到控制电流输入焊盘的另一个输入，来自监视晶体管的电流被反馈 通过电流镜电路到电压放大器的另一个输入端，使得整个电路可以被做成电流放大器，例如 驱动器负载电流/输入控制电流。 通过将外部精密电阻的一端连接到芯片的控制电流输入焊盘，并将控制电压施加到精密电阻的另一端，使与控制电压成比例的控制电流流过控制电压， 电路输入板。 该组合作为电流放大器执行。
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