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公开(公告)号：US5495166A
公开(公告)日：1996-02-27
申请号：US45465
申请日：1993-04-08
CPC分类号： G05F3/24 , H03K17/145
摘要： A threshold voltage generator for a field-effect transistor, being of a type adapted to compensate for variations of the threshold voltage from a nominal value, comprising a first amplifier having a first input connected to a current generator; a second amplifier connected ahead of a second input of the first amplifier and having an input connected to another current generator; and a third amplifier connected after the first amplifier and having an output adapted to produce the value of said threshold voltage.
摘要翻译： 一种用于场效应晶体管的阈值电压发生器，其类型适于补偿阈值电压与标称值的变化，包括具有连接到电流发生器的第一输入的第一放大器; 连接在第一放大器的第二输入端的第二放大器，并具有连接到另一电流发生器的输入端; 以及连接在所述第一放大器之后并具有适于产生所述阈值电压值的输出端的第三放大器。
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公开(公告)号：US5283478A
公开(公告)日：1994-02-01
申请号：US811323
申请日：1991-12-20
IPC分类号： G11C11/417 , G11C11/409 , H03K17/16 , H03K17/687 , H03K19/003 , H03K19/0175 , H03K3/01 , H03K5/12
CPC分类号： H03K17/163 , H03K19/00361
摘要： A fast capacitive-load driving circuit for driving output nodes on an integrated circuit. This circuit reduces noise interference caused by parasitic inductance by lowering the inductance voltage on the power supply lines during the switching process. This invention includes a voltage ramp, a voltage-to-current converter, and an output buffer having at least one pull-down transistor. A further embodiment includes an output buffer possessing a pull-down and a pull-up transistor.
摘要翻译： 一种用于驱动集成电路上的输出节点的快速电容负载驱动电路。 该电路通过在切换过程中降低电源线上的电感电压来减少由寄生电感引起的噪声干扰。 本发明包括电压斜坡，电压 - 电流转换器和具有至少一个下拉晶体管的输出缓冲器。 另一实施例包括具有下拉和上拉晶体管的输出缓冲器。
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公开(公告)号：US06414810B1
公开(公告)日：2002-07-02
申请号：US09301192
申请日：1999-04-28
IPC分类号： G11B5035
CPC分类号： G11B20/10046 , G11B2220/2516
摘要： A method of equalizing a read channel of a mass magnetic memory device comprises attenuating the low frequencies of the spectrum of the analog signal originating from an electromagnetic read transducer without boosting the high frequency harmonic components of the spectrum. The low frequencies of the spectrum of the analog input signal are attenuated with a low pass filter of an order in a range from 6 to 8 and a boost is implemented by introducing two real and opposed zeroes in the transfer function of the filter without altering the group delay.
摘要翻译： 均衡质量磁存储器件的读通道的方法包括衰减源自电磁读取换能器的模拟信号的频谱的低频，而不会增加频谱的高频谐波分量。 模拟输入信号的频谱的低频通过6至8范围内的阶数的低通滤波器衰减，并且通过在滤波器的传递函数中引入两个实数和相对的零来实现升压，而不改变 群延迟
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公开(公告)号：US06316926B1
公开(公告)日：2001-11-13
申请号：US09575334
申请日：2000-05-19
IPC分类号： G05F140
CPC分类号： H02M1/36 , Y10S323/901
摘要： A switching regulator having a switching element, a control loop for varying a duty cycle of the switching element according to a difference between a switching regulator output electric quantity and a target output electric quantity, and a digital soft start-up circuit for digitally controlling the duty cycle of the switching element, independently from said difference, in a start-up phase of the switching regulator operation.
摘要翻译： 具有开关元件的开关调节器，用于根据开关调节器输出电量与目标输出电量之间的差异来改变开关元件的占空比的控制回路和用于数字控制所述开关元件的数字软启动电路 独立于所述差值的开关元件的占空比在开关调节器操作的启动阶段。
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15.发明授权
公开(公告)号：US6140867A
公开(公告)日：2000-10-31
申请号：US312003
申请日：1999-05-14
CPC分类号： H03F3/3001 , H03H11/0472
摘要： Embodiments of the invention provide a transconductance control circuit, particularly for a continuous-time filter, comprising a transconductor across which a constant voltage is input. The transconductor is connected to a digital-to-analog converter (DAC) to set a reference current. A feedback loop is provided between an output of the transconductor and an input. In particular, the circuit further comprises a means for mirroring the reference current set by the DAC both to the feedback loop and to at least one cell of a cascade-connected filter.
摘要翻译： 本发明的实施例提供跨导控制电路，特别是对于连续时间滤波器，包括跨导体，跨导体输入恒定电压。 跨导体连接到数模转换器（DAC）以设置参考电流。 在跨导体的输出和输入之间提供反馈回路。 特别地，电路还包括用于将DAC设置的参考电流镜像到反馈回路和级联连接的滤波器的至少一个单元的装置。
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公开(公告)号：US5714903A
公开(公告)日：1998-02-03
申请号：US575872
申请日：1995-12-21
CPC分类号： G06G7/163
摘要： An analog multiplier includes at least a differential output stage formed by a pair of emitter-coupled bipolar transistors. Each transistor of the pair of emitter-coupled bipolar transistors is driven by a predistortion stage having a reciprocal of a hyperbolic tangent transfer function that is attributable to the base currents of the bipolar transistors used in the predistortion stage. The error in the output signal produced by the analog multiplier is compensated by generating replicas of the base currents of the bipolar transistors of the differential output stage and forcing those replica currents on the output node of a respective predistortion stage. Various embodiments that consume different amounts of power are described.
摘要翻译： 模拟乘法器至少包括由一对发射极耦合双极晶体管形成的差分输出级。 一对发射极耦合双极晶体管中的每个晶体管由具有双曲正切传递函数的倒数的预失真级驱动，该双曲正切转移函数归因于在预失真级中使用的双极型晶体管的基极电流。 由模拟乘法器产生的输出信号中的误差通过产生差分输出级的双极晶体管的基极电流的副本并且迫使在相应的预失真级的输出节点上的那些复制电流来补偿。 描述消耗不同功率量的各种实施例。
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公开(公告)号：US5418494A
公开(公告)日：1995-05-23
申请号：US221640
申请日：1994-03-31
CPC分类号： H03G1/04 , H03G1/0023
摘要： A variable gain amplifier which includes a first voltage-to-current amplifier having a fixed gain; a second voltage-to-current amplifier having a variable gain, functioning in parallel to said first amplifier; a gain control and stabilization variable current generator; and a current-to-voltage converter. Current output signals produced by said first and second amplifiers and by said variable current generator are summed and the resulting current signal is converted to a voltage signal by said converter.
摘要翻译： 一种可变增益放大器，包括具有固定增益的第一电压 - 电流放大器; 具有与所述第一放大器并联起作用的可变增益的第二电压 - 电流放大器; 增益控制和稳定可变电流发生器; 和电流 - 电压转换器。 由所述第一和第二放大器和所述可变电流发生器产生的电流输出信号被相加，并且所得到的电流信号由所述转换器转换成电压信号。
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