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    • 4. 发明申请
    • SMOOTH SWITCHING BETWEEN ANALOG INPUT SIGNALS
    • 模拟输入信号之间的平滑切换
    • US20100123508A1
    • 2010-05-20
    • US12578572
    • 2009-10-13
    • Gang ZhaGuenter NeidhardtPeter Kirchlechner
    • Gang ZhaGuenter NeidhardtPeter Kirchlechner
    • H03K17/00
    • H03K17/005H03K17/16
    • A first switching circuit has an input for receiving a first input signal, and a second switching circuit has an input for receiving a second input signal. A node is connected to receive outputs from both the first and second switching circuits. A filter receives an unfiltered signal from the node to generate an output signal. A circuit is provided to alternately actuate the first and second switching circuits during a transition time period so as to smoothly transition the output of the filter between the first and second input signals. At least one of the first and second input signals is a time-varying analog signal. The smooth transition between the first and second input signals has a shape determined by pulse width and frequency characteristics of pulses output by the circuit to alternately actuate the first and second switching circuits. The shape may include a linear ramp, an S-shaped curve, a parabolic curve and a hyperbolic curve.
    • 第一开关电路具有用于接收第一输入信号的输入端,第二开关电路具有用于接收第二输入信号的输入端。 连接节点以接收来自第一和第二开关电路的输出。 滤波器从节点接收未滤波的信号以产生输出信号。 提供电路以在转变时间周期期间交替地致动第一和第二开关电路,以便在第一和第二输入信号之间平滑地转换滤波器的输出。 第一和第二输入信号中的至少一个是时变模拟信号。 第一和第二输入信号之间的平滑过渡具有由电路输出的脉冲的脉冲宽度和频率特性确定的形状,以交替地致动第一和第二开关电路。 该形状可以包括线性斜坡,S形曲线,抛物线曲线和双曲线。
    • 6. 发明授权
    • Regulator over-voltage protection circuit with reduced standby current
    • 稳压器过电压保护电路具有降低的待机电流
    • US08947060B2
    • 2015-02-03
    • US12953392
    • 2010-11-23
    • Da Song LinNi ZengGang ZhaXianfeng XiongYiwei Zhang
    • Da Song LinNi ZengGang ZhaXianfeng XiongYiwei Zhang
    • G05F1/00H02M1/32H02M3/00
    • H02M1/32H02M3/00
    • An embodiment of the invention relates to a power converter formed with an error amplifier and a related method. In an embodiment, a first switch is coupled in series with an error amplifier compensation capacitor. Upon detection of a current level greater than a threshold level, the compensation capacitor is decoupled from the error amplifier by opening the first switch. In an embodiment, a second switch is coupled in parallel with the compensation capacitor, and the current-sensing circuit enables conductivity of the second switch to discharge the compensation capacitor upon detection of the current level greater than the threshold level. The second switch is opened upon detection of the current level less than the threshold level. In an embodiment, the current-sensing circuit controls an output current of the power converter at a current-limit level upon detection of the internal current level greater than the threshold level.
    • 本发明的实施例涉及一种形成有误差放大器的功率转换器及相关方法。 在一个实施例中,第一开关与误差放大器补偿电容器串联耦合。 在检测到大于阈值电平的电流电平时,通过打开第一开关将补偿电容器与误差放大器去耦。 在一个实施例中,第二开关与补偿电容器并联耦合,并且当检测到大于阈值电平的电流电平时,电流检测电路使得​​第二开关的电导率能够使补偿电容器放电。 在检测到小于阈值电平的当前电平时,打开第二个开关。 在一个实施例中,电流检测电路在检测到大于阈值电平的内部电流电平时,将电力转换器的输出电流控制在限流电平。
    • 7. 发明申请
    • Regulator Over-Voltage Protection Circuit with Reduced Standby Current
    • 具有降低待机电流的稳压器过压保护电路
    • US20110156688A1
    • 2011-06-30
    • US12953392
    • 2010-11-23
    • Da Song LinNi ZengGang ZhaXianfeng XiongYiwei Zhang
    • Da Song LinNi ZengGang ZhaXianfeng XiongYiwei Zhang
    • G05F1/10
    • H02M1/32H02M3/00
    • An embodiment of the invention relates to a power converter formed with an error amplifier and a related method. In an embodiment, a first switch is coupled in series with an error amplifier compensation capacitor. Upon detection of a current level greater than a threshold level, the compensation capacitor is decoupled from the error amplifier by opening the first switch. In an embodiment, a second switch is coupled in parallel with the compensation capacitor, and the current-sensing circuit enables conductivity of the second switch to discharge the compensation capacitor upon detection of the current level greater than the threshold level. The second switch is opened upon detection of the current level less than the threshold level. In an embodiment, the current-sensing circuit controls an output current of the power converter at a current-limit level upon detection of the internal current level greater than the threshold level.
    • 本发明的实施例涉及一种形成有误差放大器的功率转换器及相关方法。 在一个实施例中,第一开关与误差放大器补偿电容器串联耦合。 在检测到大于阈值电平的电流电平时,通过打开第一开关将补偿电容器与误差放大器去耦。 在一个实施例中,第二开关与补偿电容器并联耦合,并且当检测到大于阈值电平的电流电平时,电流检测电路使得​​第二开关的电导率能够使补偿电容器放电。 在检测到小于阈值电平的当前电平时,打开第二个开关。 在一个实施例中,电流检测电路在检测到大于阈值电平的内部电流电平时,将电力转换器的输出电流控制在限流电平。
    • 8. 发明授权
    • Current amplifier structure
    • 电流放大器结构
    • US06891437B2
    • 2005-05-10
    • US10071013
    • 2002-02-08
    • Gang ZhaSolomon Ng
    • Gang ZhaSolomon Ng
    • H03F1/34H03F3/45
    • H03F3/45085H03F1/34H03F3/45475H03F2203/45511
    • A circuit structure for performing current amplification. The circuit structure may be standardized as a current amplifier cell such that many types of applications requiring current amplification may be created. The basic amplifier cell, which may accept voltage or current sources as an input signal, produces two identical output signals which may be used for feedback or serve as input to additional amplifier stages. This simple structure may be extended to perform current amplification with variable gain or AC or DC voltage-to-current conversion through the use of appropriately selected resistive elements.
    • 一种用于执行电流放大的电路结构。 电路结构可以被标准化为电流放大器单元,使得可以创建需要电流放大的许多类型的应用。 可以接受电压或电流源作为输入信号的基本放大器单元产生两个相同的输出信号,这些信号可用于反馈或用作附加放大器级的输入。 可以通过使用适当选择的电阻元件来扩展这种简单的结构以执行具有可变增益或AC或DC电压到电流转换的电流放大。
    • 9. 发明授权
    • Temperature stable integrated circuit full wave level detector incorporating a single operational amplifier stage design
    • 具有单个运算放大器级设计的温度稳定型集成电路全波电平检测器
    • US06456058B1
    • 2002-09-24
    • US09643157
    • 2000-08-21
    • Gang Zha
    • Gang Zha
    • G01R1163
    • G01R19/04H03K5/08
    • A temperature stable, integrated circuit full wave level detector incorporating a single stage operational amplifier design which does not require, as in prior art implementations, two operational amplifiers to perform a full wave rectification function on an input alternating current (“AC”) signal followed by a comparator to detect the resultant signal level. The full wave level detector of the present invention utilizes but a single amplifier and some additional peripheral components resulting in a saving in on-chip die area in an integrated circuit (“IC”) implementation while also exhibiting excellent temperature stability characteristics.
    • 一种温度稳定的集成电路全波电平检测器,其结合单级运算放大器设计,如现有技术实现中那样,不需要两个运算放大器来对输入交流电(“AC”)信号执行全波整流功能 由比较器检测结果信号电平。 本发明的全波电平检测器利用单个放大器和一些附加的外围部件,从而在集成电路(“IC”)实现中节省了片上管芯面积,同时还具有出色的温度稳定特性。