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11. 发明授权

US07847637B2 High efficiency precision amplifier 有权
标题翻译：高效精密放大器
公开(公告)号：US07847637B2
公开(公告)日：2010-12-07
申请号：US12491081
申请日：2009-06-24
申请人： Juergen Metzger , Mikhail V. Ivanov , Vadim V. Ivanov , Viola Schaffer
发明人： Juergen Metzger , Mikhail V. Ivanov , Vadim V. Ivanov , Viola Schaffer
IPC分类号： H03F3/04
CPC分类号： H03F3/217
摘要： A high efficiency precision amplifier which comprises a linear amplifier stage, a class D amplifier stage and a set of switches is provided. Both amplifier stages receive the same input signal. The load is driven by the output of the linear amplifier stage. The set of switches connect the output of the class D amplifier stage to either of the positive and negative supply terminals of the linear amplifier stage and the other of the positive and negative supply terminals of the linear amplifier stage to a negative or positive supply, depending on the polarity of the signal being amplified.
摘要翻译：提供了一种高效率精密放大器，其包括线性放大器级，D类放大器级和一组开关。两个放大器级都接收相同的输入信号。负载由线性放大器级的输出驱动。该组开关将D类放大器级的输出端与线性放大器级的正极和负极电源端子以及线性放大器级的正极和负极电源端子中的任一端连接到负电源或正电源，这取决于关于被放大信号的极性。

12. 发明授权

US07843261B2 Resistor network for programmable transconductance stage 有权
标题翻译：用于可编程跨导级的电阻网络
公开(公告)号：US07843261B2
公开(公告)日：2010-11-30
申请号：US12338571
申请日：2008-12-18
申请人： Viola Schaffer
发明人： Viola Schaffer
IPC分类号： H03F1/34
CPC分类号： H03G1/0088
摘要： A voltage-to-current converter is provided. The voltage-to-current converter comprises an amplifier, a resistor network, an R-2R network, and switches. The amplifier has a first input node (which is an input signal), a second input node, and an output node. The resistor network is coupled to the output node of the amplifier, includes a plurality of resistors coupled in series with on another, and includes a plurality of first tap nodes. The R-2R network is coupled to the resistor network and includes a plurality of second tap nodes. Additionally, at least one switch is coupled between the second input node of the amplifier and each first tap node, and at least one switch is coupled between the second input node of the amplifier and each of the second tap nodes.
摘要翻译：提供一个电压 - 电流转换器。电压 - 电流转换器包括放大器，电阻网络，R-2R网络和开关。放大器具有第一输入节点（其是输入信号），第二输入节点和输出节点。电阻器网络耦合到放大器的输出节点，包括与另一个串联耦合的多个电阻器，并且包括多个第一抽头节点。 R-2R网络耦合到电阻网络并且包括多个第二抽头节点。另外，至少一个开关耦合在放大器的第二输入节点和每个第一抽头节点之间，并且至少一个开关耦合在放大器的第二输入节点和每个第二抽头节点之间。

13. 发明授权

US07733169B2 Slew rate and settling time improvement circuitry and method for 3-stage amplifier 有权
标题翻译： 3级放大器的转换速率和建立时间改善电路和方法
公开(公告)号：US07733169B2
公开(公告)日：2010-06-08
申请号：US12151503
申请日：2008-05-07
申请人： Joy Y. Zhang , Viola Schaffer
发明人： Joy Y. Zhang , Viola Schaffer
IPC分类号： H03F1/02
CPC分类号： H03F3/005 , H03F3/387 , H03F3/45475 , H03F2200/261 , H03F2200/408 , H03F2203/45138 , H03F2203/45248 , H03F2203/45512 , H03H19/004
摘要： An operational amplifier (1B) amplifies an input signal (Vin) to produce an output signal (Vout), and includes a 3-stage amplifier (1C) including a first amplifier stage (2) receiving the input signal, a second amplifier stage (3) driven by the first amplifier stage (2), and a third amplifier stage (4) driven by the second amplifier stage to produce the output signal. A slew detection current (Idetect) is generated when the input signal (Vin) exceeds a certain magnitude, and is converted to a control signal (41) that operates a switch (MN0) to short-circuit output conductors of the first amplifier stage to prevent signal charge from building up on capacitances associated with the output of the first amplifier stage during slewing. The three stage amplifier can be a chopper-stabilized, notch-filtered amplifier.
摘要翻译：运算放大器（1B）放大输入信号（Vin）以产生输出信号（Vout），并且包括一个包括接收输入信号的第一放大器级（2）和第二放大级（3）的三级放大器（1C）由第一放大器级（2）驱动的第三放大级（4）和由第二放大级驱动的第三放大级（4）产生输出信号。当输入信号（Vin）超过一定量值时，产生转换检测电流（Idetect），并转换成操作开关（MN0）的控制信号（41），使第一放大级的输出导体短路到防止在回转期间与第一放大器级的输出相关联的电容上的信号电荷积聚。三级放大器可以是斩波稳定的陷波滤波放大器。

14. 发明授权

US07449873B2 Voltage controlled current source device 有权
标题翻译：电压电流源装置
公开(公告)号：US07449873B2
公开(公告)日：2008-11-11
申请号：US11383320
申请日：2006-05-15
申请人： Viola Schaffer , Rodney T. Burt , Jürgen Metzger
发明人： Viola Schaffer , Rodney T. Burt , Jürgen Metzger
IPC分类号： G05F3/16
CPC分类号： G05F3/262
摘要： An integrated voltage controlled current source device is provided, that extends the high accuracy, low drift output current over a large current range, and provides more headroom and better power efficiency than the standard shunt resistor and INA (instrumentation amplifier) current source arrangement. The device has a control voltage input, a load current output and a current set terminal for a connection of a current set resistor. It contains a selected leg biasing set voltage, corresponding to a control voltage applied to the control voltage input of a regulating driver amplifier providing a regulated voltage to be applied across the current set resistor, thereby causing a reference current to flow through the current set resistor and selected leg(s) of a current mirror. Furthermore, the device contains a dynamically matched current mirror that mirrors the reference current to the load output current. The algorithm for selecting the current mirror legs may be a pseudo-random or a defined pattern.
摘要翻译：提供集成的电压控制电流源装置，其在大电流范围内延伸高精度，低漂移输出电流，并且比标准分流电阻器和INA（仪表放大器）电流源装置提供更大的净空和更好的功率效率。该器件具有控制电压输入，负载电流输出和用于连接电流设定电阻的电流设置端子。它包含一个选定的支路偏置设定电压，对应于施加到调节驱动放大器的控制电压输入端的控制电压，该调节驱动放大器提供施加在电流设定电阻器两端的调节电压，从而使参考电流流过电流设定电阻器和当前镜像的选定的腿。此外，该器件还包含一个动态匹配的电流镜，将电流反映到负载输出电流。用于选择当前镜腿的算法可以是伪随机的或定义的模式。

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