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公开(公告)号：US5422559A
公开(公告)日：1995-06-06
申请号：US161627
申请日：1993-12-06
CPC分类号： H02J7/008
摘要： A pulsed battery charger circuit (11) for charging a battery (28). A control circuit (17) is responsive to a sense circuit (16) that monitors the battery voltage. The control circuit (17) pulses a first current source (25) or a second current source (20). An amplifier (14) is responsive to the first (25) and second (20) current sources for generating first and second predetermined voltages between a drive output (12) and a sense input (13). The first current source (25) is pulsed when the sense circuit (16) senses the battery voltage to be less than a first threshold voltage. The second current source (20) is pulsed when the sense circuit (16) senses the battery voltage to be greater than the first threshold voltage. Both the first (25) and second (20) current sources are disabled when the sense circuit (16) senses the battery voltage to be greater than a second threshold voltage.
摘要翻译： 一种用于对电池（28）充电的脉冲电池充电器电路（11）。 控制电路（17）响应监视电池电压的检测电路（16）。 控制电路（17）对第一电流源（25）或第二电流源（20）进行脉冲。 放大器（14）响应于第一（25）和第二（20）电流源，用于在驱动输出（12）和感测输入（13）之间产生第一和第二预定电压。 当感测电路（16）感测到电池电压小于第一阈值电压时，第一电流源（25）是脉冲的。 当感测电路（16）感测到电池电压大于第一阈值电压时，第二电流源（20）被脉冲。 当感测电路（16）感测到电池电压大于第二阈值电压时，第一（25）和第二（20）电流源都被禁用。
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公开(公告)号：US5610495A
公开(公告)日：1997-03-11
申请号：US262305
申请日：1994-06-20
CPC分类号： H02J7/0019 , H01M10/48 , Y10S320/13
摘要： A battery monitoring circuit (10) sequentially samples individual voltages across a string of serially coupled battery cells (12-18). A control circuit (32) controls first and second multiplexers (34,42) to sample each battery voltage for an over-voltage condition. A comparator (52) detects an over-voltage condition by comparing a divided down battery voltage against a reference. The conduction path through the battery cells is disabled upon detecting a fault condition by a transistor (26) in the battery cell conduction path. The battery cells are further sequentially sampled for an under-voltage fault. The comparator detects an under-voltage condition by comparing a second divided down battery voltage against the reference. The conduction path through the battery cells is disabled upon detecting a fault condition by a transistor (24) in the battery cell conduction path.
摘要翻译： 电池监视电路（10）顺序地对串联的串联电池单元（12-18）的各个电压进行采样。 控制电路（32）控制第一和第二多路复用器（34,42）以对每个电池电压进行采样以用于过电压状态。 比较器（52）通过将分压的电池电压与参考值进行比较来检测过电压状态。 在通过电池单元传导路径中的晶体管（26）检测到故障状态时，通过电池单元的传导路径被禁用。 对于欠压故障，电池单元进一步顺序采样。 比较器通过比较第二分压电池电压与参考值来检测欠电压状况。 在通过电池单元传导路径中的晶体管（24）检测到故障状态时，通过电池单元的传导路径被禁止。
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公开(公告)号：US5327100A
公开(公告)日：1994-07-05
申请号：US24142
申请日：1993-03-01
CPC分类号： H03F3/3071 , H03F3/45094 , H03F2203/45022 , H03F2203/45028 , H03F2203/45178 , H03F2203/45188 , H03F2203/45258 , H03F2203/45374 , H03F2203/45496 , H03F2203/45674 , H03F2203/45696
摘要： An operational amplifier enhances its negative slew rate by providing more base current to a bottom PNP output drive transistor. A large signal applied at the inverting input of the operational amplifier unbalances the differential input stage and provides maximum current through a current mirror circuit to the base of the PNP output transistor. A transistor is biased on by sufficient current flow through the current mirror circuit to draw even more base current from the base of the PNP output transistor and thereby enhance its negative slew rate.
摘要翻译： 运算放大器通过向底部PNP输出驱动晶体管提供更多的基极电流来增强其负压摆率。 施加在运算放大器的反相输入端的大信号不平衡差分输入级，并通过电流镜电路提供最大电流至PNP输出晶体管的基极。 晶体管被充分的电流流过电流镜电路而被偏置，以从PNP输出晶体管的基极吸取更多的基极电流，从而增强其负的压摆率。
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公开(公告)号：US5376875A
公开(公告)日：1994-12-27
申请号：US160764
申请日：1993-12-03
CPC分类号： H02J7/008
摘要： A battery charger status monitor circuit (40) for monitoring the status of a battery (12) charged with current pulses. The current pulses charging the battery (12) are reduced in frequency and duty cycle as the battery approaches a fully charged condition. By monitoring the number of current pulses charging the battery within a predetermined time period, the charge status of the battery (12) is determined. If no pulses are detected within the predetermined time period, the battery (12) is fully charged. A counter (47) is incremented by a clock signal. A charge signal resets the counter (47). The charge signal corresponds to the current pulses charging the battery. If the counter (47) reaches a predetermined count, the clock and charge signals are disabled. Reaching the predetermined count before resetting indicates the battery (12) is fully charged. When the counter is below the predetermined count, the battery (12) is being charged.
摘要翻译： 一种用于监视充电电流脉冲的电池（12）的状态的电池充电器状态监视电路（40）。 当电池接近完全充电状态时，对电池（12）充电的电流脉冲的频率和占空比会降低。 通过监视在预定时间段内对电池充电的电流脉冲数，确定电池（12）的充电状态。 如果在预定时间段内没有检测到脉冲，则电池（12）被充满电。 计数器（47）由时钟信号递增。 计费信号复位计数器（47）。 充电信号对应于对电池充电的电流脉冲。 如果计数器（47）达到预定计数，则时钟和充电信号被禁用。 在复位前达到预定的计数表示电池（12）已充满电。 当计数器低于预定计数时，电池（12）正在充电。
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公开(公告)号：US5521488A
公开(公告)日：1996-05-28
申请号：US179633
申请日：1994-01-10
CPC分类号： H02M3/1563
摘要： A voltage regulator (11) having an input (12) for receiving an input current and an output (13) for providing a regulated voltage. The voltage regulator (11) comprising a diode (14), a capacitor (16), a first comparator (17), a second comparator (18), a logic circuit (19), and a switch circuit (21). The capacitor (16) is charged by the input current coupled through the diode (14). The first comparator (17) senses when the voltage on the capacitor (16) exceeds a first reference voltage and provides a signal to the logic circuit (19). The logic circuit (19) enables the switch circuit (21) for shunting the input current from charging the capacitor (19). The second comparator (18) senses when the voltage on the capacitor (16) falls below a second reference voltage and provides a signal to the logic circuit (19). The logic circuit (19) disables the switch circuit (21) from shunting the input current thereby charging the capacitor (19). Thus, the voltage at output (13) stays between the first and second predetermined voltages.
摘要翻译： 具有用于接收输入电流的输入端（12）和用于提供调节电压的输出（13）的电压调节器（11）。 电压调节器（11）包括二极管（14），电容器（16），第一比较器（17），第二比较器（18），逻辑电路（19）和开关电路（21）。 电容器（16）由通过二极管（14）耦合的输入电流充电。 第一比较器（17）感测电容器（16）上的电压何时超过第一参考电压并且向逻辑电路（19）提供信号。 逻辑电路（19）使得开关电路（21）能够使输入电流分流以对电容器（19）充电。 第二比较器（18）感测电容器（16）上的电压何时低于第二参考电压并且向逻辑电路（19）提供信号。 逻辑电路（19）禁止开关电路（21）分流输入电流，从而对电容器（19）充电。 因此，输出（13）处的电压保持在第一和第二预定电压之间。
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公开(公告)号：US5471174A
公开(公告)日：1995-11-28
申请号：US349578
申请日：1994-12-05
摘要： An amplifier circuit (10) receives a differential input signal and provides an amplified differential signal. A converter circuit (14) is responsive to the amplified differential signal and provides a single-ended signal. An output stage (16) is responsive to the single-ended signal for providing an output signal of the amplifier circuit. The output stage provides bias cancellation for the single-ended signal by injecting a current equal to the bias requirement of the input transistors (20, 38). The bias cancellation maintains a high input impedance and high gain and output drive for the output stage.
摘要翻译： 放大器电路（10）接收差分输入信号并提供放大的差分信号。 A转换器电路（14）响应放大的差分信号并提供单端信号。 输出级（16）响应于单端信号以提供放大器电路的输出信号。 输出级通过注入等于输入晶体管（20,38）的偏置要求的电流来为单端信号提供偏置消除。 偏置消除在输出级保持高输入阻抗和高增益和输出驱动。
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7.发明授权Amplifier input stage with charge pump supplying a differential transistor pair 失效具有电荷泵的放大器输入级提供差分晶体管对
公开(公告)号：US5422600A
公开(公告)日：1995-06-06
申请号：US264290
申请日：1994-06-23
IPC分类号： H03F3/45
CPC分类号： H03F3/45094 , H03F2203/45028 , H03F2203/45124 , H03F2203/45476 , H03F2203/45648 , H03F2203/45674
摘要： An input stage to an amplifier circuit (10) operating with a one volt power supply potential (32) receives a differential input signal. A charge pump (36) increases the one volt power supply potential to 1.8 volts for providing additional head-room for the differential input signal. A current source (44) controls a current mirror (40-42) to draw a predetermined current from the charge pump to supply the active conduction path of a differential transistor pair (12-14). An output stage (34) of the amplifier circuit operates off the one volt power supply potential. Since the charge pump drives only the differential transistor pair through the current mirror, it may be made small to fit on the same integrated circuit as the amplifier including any necessary pump capacitors.
摘要翻译： 用一伏电源电位（32）工作的放大器电路（10）的输入级接收差分输入信号。 电荷泵（36）将一伏特电源电位增加到1.8伏，为差分输入信号提供额外的头部空间。 电流源（44）控制电流镜（40-42）从电荷泵吸取预定电流以提供差动晶体管对（12-14）的有源导通路径。 放大器电路的输出级（34）操作一伏特电源电位。 由于电荷泵仅驱动通过电流镜的差分晶体管对，所以可以使其小到与包括任何必需的泵电容器的放大器相同的集成电路。
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公开(公告)号：US5285170A
公开(公告)日：1994-02-08
申请号：US983357
申请日：1992-11-30
CPC分类号： H03F3/3088
摘要： An operational amplifier achieves higher operating speed by using an all NPN transistor output drive stage. A control circuit in output drive stage receives an input signal and providing first and second control signals. The first and second control signals in turn drive first and second NPN output drive transistors arranged in a totem pole configuration between first and second power supply conductors.
摘要翻译： 运算放大器通过使用全NPN晶体管输出驱动级实现更高的工作速度。 输出驱动级中的控制电路接收输入信号并提供第一和第二控制信号。 第一和第二控制信号又驱动以第一和第二电源导体之间的图腾柱结构排列的第一和第二NPN输出驱动晶体管。
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公开(公告)号：US5818201A
公开(公告)日：1998-10-06
申请号：US814684
申请日：1997-03-11
CPC分类号： H02J7/008 , H02J7/0016 , H02J7/0026 , H02J7/0036
摘要： A battery charge control circuit (10) senses the charge condition of cells in a battery pack (12, 14, 16, 18) using a measurement circuit (51). Upon detection of a single under-voltage cell, the charge control circuit is placed in a sleep mode. Pack sense circuit (240) senses when the battery pack is placed in a charger. If circuit (10) was in a sleep mode, it is awakened. If any cell is measured over-voltage, the status is checked versus the other cells. If all the cells are over-voltage, the battery is considered balanced. If one or more cells are not over-voltage, a control circuit (32) activates a discharge transistor (212, 214, 216, 218), discharging the cell within a hysteresis voltage below the over-voltage limit. Charge balancing of cells is continued until the cells are within a programmable hysteresis voltage of each other.
摘要翻译： 电池充电控制电路（10）使用测量电路（51）感测电池组（12,14,16,18）中的电池的充电状态。 在检测到单个欠压单元时，充电控制电路处于睡眠模式。 包感测电路（240）感测电池组何时被放置在充电器中。 如果电路（10）处于睡眠模式，则唤醒。 如果任何电池被测量过电压，则检查状态与其他电池。 如果所有电池都是过电压，则认为电池是平衡的。 如果一个或多个电池不是过电压，则控制电路（32）激活放电晶体管（212,214,216,218），使电池在低于过电压限制的滞后电压内放电。 电池的电荷平衡继续进行，直到电池在可编程的滞后电压之内。
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10.发明授权
公开(公告)号：US5675268A
公开(公告)日：1997-10-07
申请号：US538522
申请日：1995-10-03
IPC分类号： H03K17/082 , H03K5/153 , H03K5/22
CPC分类号： H03K17/0822
摘要： An overcurrent detector circuit (21) for a power MOSFET (22) is described. The overcurrent detector circuit (21) generates a bias voltage corresponding to the drain to source voltage of the power MOSFET (22). The drain to source voltage correlates directly to the current being conducted by the power MOSFET (22). An overcurrent condition occurs when the power MOSFET (22) exceeds a predetermined current. The bias voltage is applied to a transistor (24) for generating a current. A current source (29) couples to the transistor (24). The current provided by the transistor equals the reference current of the current source (29) when the power MOSFET conducts the predetermined current. The overcurrent detector circuit (21) generates a signal indicating a overcurrent condition does not exist when the reference current is greater the current provided by the transistor. Conversely, the overcurrent detector circuit (21) generates a signal indicating the overcurrent condition when the current provided by the transistor exceeds the reference current.
摘要翻译： 描述了用于功率MOSFET（22）的过电流检测器电路（21）。 过电流检测器电路（21）产生对应于功率MOSFET（22）的漏极 - 源极电压的偏置电压。 漏极到源极电压直接与由功率MOSFET（22）传导的电流相关。 当功率MOSFET（22）超过预定电流时，发生过电流状况。 偏置电压被施加到用于产生电流的晶体管（24）。 电流源（29）耦合到晶体管（24）。 当功率MOSFET导通预定电流时，由晶体管提供的电流等于电流源（29）的参考电流。 过电流检测器电路（21）产生指示当晶体管提供的电流的参考电流大时，过电流状态不存在的信号。 相反，当由晶体管提供的电流超过参考电流时，过电流检测器电路（21）产生指示过电流状况的信号。
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