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1. 发明申请

US20100329487A1 PREAMPLIFIER CIRCUIT FOR A MICROELECTROMECHANICAL CAPACITIVE ACOUSTIC TRANSDUCER 有权
标题翻译：微电子电容式电声传感器的前置放大器电路
公开(公告)号：US20100329487A1
公开(公告)日：2010-12-30
申请号：US12826210
申请日：2010-06-29
申请人： Filippo David , Igino Padovani
发明人： Filippo David , Igino Padovani
IPC分类号： H04R11/04
CPC分类号： H03F3/45179 , G05F3/30 , H03F1/3211 , H03F3/185 , H03F3/187 , H03F3/45 , H03F3/45183 , H03F3/45192 , H03F3/45475 , H03F3/45632 , H03F2200/03 , H03F2200/18 , H03F2200/213 , H03F2200/372 , H03F2200/447 , H03F2200/555 , H03F2203/45136 , H03F2203/45244 , H03F2203/45392 , H03F2203/45456 , H03F2203/45628 , H03F2203/45631 , H04R3/007 , H04R19/01 , H04R19/04 , H04R2201/003
摘要： Described herein is a preamplifier circuit for a capacitive acoustic transducer provided with a MEMS detection structure that generates a capacitive variation as a function of an acoustic signal to be detected, starting from a capacitance at rest; the preamplifier circuit is provided with an amplification stage that generates a differential output signal correlated to the capacitive variation. In particular, the amplification stage is an input stage of the preamplifier circuit and has a fully differential amplifier having a first differential input (INP) directly connected to the MEMS detection structure and a second differential input (INN) connected to a reference capacitive element, which has a value of capacitance equal to the capacitance at rest of the MEMS detection structure and fixed with respect to the acoustic signal to be detected; the fully differential amplifier amplifies the capacitive variation and generates the differential output signal.
摘要翻译：这里描述的是一种用于电容式声学换能器的前置放大器电路，该电容式声学换能器具有从静止电容开始的MEMS检测结构，其产生作为要检测的声学信号的函数的电容变化; 前置放大器电路具有产生与电容变化相关的差分输出信号的放大级。特别地，放大级是前置放大器电路的输入级，并且具有完全差分放大器，其具有直接连接到MEMS检测结构的第一差分输入（INP）和连接到参考电容元件的第二差分输入（INN）其具有等于MEMS检测结构的静止电容并且相对于要检测的声信号固定的电容值; 全差分放大器放大电容变化并产生差分输出信号。

2. 发明申请

US20100264987A1 AMPLIFIER WITH BIAS STABILIZER 有权
标题翻译：放大器与偏置稳压器
公开(公告)号：US20100264987A1
公开(公告)日：2010-10-21
申请号：US12763505
申请日：2010-04-20
申请人： Tachio YUASA
发明人： Tachio YUASA
IPC分类号： H03F3/45 , H03F3/04
CPC分类号： H03F3/45183 , H03F1/086 , H03F2203/45456 , H03F2203/45511 , H03F2203/45628 , H03F2203/45648
摘要： An amplifier with bias stabilizer includes first to forth transistors, an amplifier unit and a resistor. The first transistor and the second transistor are connected in series between first and second power supplies and generate a first current. The third transistor is connected in a current mirror configuration to the second transistor and generates a second current corresponding to the first current. The amplifier unit generates an output signal based on an input signal and includes a fourth transistor, the fourth transistor generating a control voltage according to the second current so as to control the first transistor. The resistor is connected in series to at least one of the first to fourth transistors.
摘要翻译：具有偏置稳压器的放大器包括第一至第四晶体管，放大器单元和电阻器。第一晶体管和第二晶体管串联连接在第一和第二电源之间并产生第一电流。第三晶体管以电流镜配置连接到第二晶体管，并产生对应于第一电流的第二电流。放大器单元基于输入信号生成输出信号，并且包括第四晶体管，第四晶体管根据第二电流产生控制电压，以便控制第一晶体管。电阻器与第一至第四晶体管中的至少一个串联连接。

3. 发明申请

US20040251965A1 Differential amplifier with temperature compensating function 审中-公开
标题翻译：具有温度补偿功能的差分放大器
公开(公告)号：US20040251965A1
公开(公告)日：2004-12-16
申请号：US10493312
申请日：2004-05-04
发明人： Tetsuya Ueda , Yoshinori Takahashi
IPC分类号： H03F003/45
CPC分类号： H03F1/302 , H03F3/45085 , H03F2203/45362 , H03F2203/45456
摘要： A temperature compensated differential amplifier includes a first differential amplifier and a second differential amplifier. The first differential amplifier includes a feedback resistance, and has a gain proportional to temperature. The second differential amplifier is connected to the output side of the first differential amplifier, includes no feedback resistance, and has a gain inversely proportional to the temperature. The first differential amplifier carries out the temperature compensation of the gain and distortion of the second differential amplifier.
摘要翻译：温度补偿差分放大器包括第一差分放大器和第二差分放大器。第一差分放大器包括反馈电阻，并具有与温度成比例的增益。第二差分放大器连接到第一差分放大器的输出侧，不包括反馈电阻，并且具有与温度成反比的增益。第一差分放大器对第二差分放大器的增益和失真进行温度补偿。

4. 发明授权

US06657486B2 MOS differential amplifier circuit having a wide linear input voltage range 有权
标题翻译： MOS差分放大电路具有宽线性输入电压范围
公开(公告)号：US06657486B2
公开(公告)日：2003-12-02
申请号：US10234129
申请日：2002-09-05
申请人： Katsuji Kimura
发明人： Katsuji Kimura
IPC分类号： G06G726
CPC分类号： H03F3/45717 , G06G7/14 , H03F3/45183 , H03F3/4565 , H03F3/4569 , H03F3/45708 , H03F3/45739 , H03F2203/45456 , H03F2203/45484 , H03F2203/45566 , H03F2203/45612 , H03F2203/45702
摘要： A MOS differential amplifier circuit has a differential pair having first and second MOS transistors. The source electrodes of the first and second MOS transistors are commonly coupled and driven by a current source, which can be adjusted to change the transconductance of the amplifier. The circuit can be provided with a quadri-tall cell or level shifter in order to provide this operation. With these operational characteristics, the MOS differential pair of this type can be used in a voltage adder/subtractor circuit.
摘要翻译： MOS差分放大器电路具有具有第一和第二MOS晶体管的差分对。第一和第二MOS晶体管的源极通常由电流源耦合和驱动，电流源可以被调节以改变放大器的跨导。为了提供这种操作，该电路可以设置有四节细胞或电平移位器。利用这些操作特性，这种类型的MOS差分对可以用在电压加法器/减法器电路中。

5. 发明授权

US06657485B2 Linear voltage subtractor/adder circuit and MOS differential amplifier circuit therefor 有权
标题翻译：线性电压减法器/加法电路及其MOS差分放大电路
公开(公告)号：US06657485B2
公开(公告)日：2003-12-02
申请号：US10137298
申请日：2002-05-03
申请人： Katsuji Kimura
发明人： Katsuji Kimura
IPC分类号： G06G712
CPC分类号： H03F3/45717 , G06G7/14 , H03F3/45183 , H03F3/4565 , H03F3/4569 , H03F3/45708 , H03F3/45739 , H03F2203/45456 , H03F2203/45484 , H03F2203/45566 , H03F2203/45612 , H03F2203/45702
摘要： A MOS differential amplifier circuit has a differential pair having first and second MOS transistors. The source electrodes of the first and second MOS transistors are commonly coupled and driven by a constant current source. The current sources can be controlled so that the difference between the common mode voltage and the common source voltage becomes constant, and a level shifter may be provided for level-shifting the common source voltage of the first and second MOS transistor. The MOS differential amplifier circuit so designed can be used in a voltage adder/subtractor circuit.
摘要翻译： MOS差分放大器电路具有具有第一和第二MOS晶体管的差分对。第一和第二MOS晶体管的源电极通常由恒定电流源耦合和驱动。可以控制电流源，使得共模电压和公共源电压之间的差变为恒定，并且可以提供电平移位器来对第一和第二MOS晶体管的公共源电压进行电平移位。这样设计的MOS差分放大器电路可以用在电压加法器/减法器电路中。

6. 发明申请

US20030020543A1 Bipolar differential amplifier 有权
标题翻译：双极差分放大器
公开(公告)号：US20030020543A1
公开(公告)日：2003-01-30
申请号：US10197145
申请日：2002-07-16
发明人： Anthony Newton
IPC分类号： H03F003/45
CPC分类号： H03F3/45085 , H03F2203/45456 , H03F2203/45466 , H03F2203/45498 , H03F2203/45621
摘要： A bipolar differential amplifier having first and second transistors (Q1, Q2) and a large third transistor (Q3) sharing a common load resistor (Rt), and DC biasing for biasing the bases of the first, second and third transistors, whereby the first and second transistors have a DC operating current whose value I is related to the common resistor value Rt and the thermal voltage Vt by the expression RtnullVt/2I. In this way the gain of the differential amplifier remains substantially constant over a wide range of the input signal. This produces advantages of: a wide range of linear operation, a relative low bias current may be used, and lack of noise at the central operating point introduced by the large third transistor and the load resistor.
摘要翻译：具有共享公共负载电阻（Rt）的第一和第二晶体管（Q1，Q2）和大的第三晶体管（Q3）的双极性差分放大器以及用于偏置第一，第二和第三晶体管的基极的DC偏置，由此第一并且第二晶体管具有其工作电流I，其值I与公共电阻值Rt和热电压Vt相关，表达式为Rt = Vt / 2I。以这种方式，差分放大器的增益在输入信号的宽范围内保持基本恒定。这产生的优点是：宽范围的线性操作，可以使用相对低的偏置电流，并且由大的第三晶体管和负载电阻引入的中心工作点处的噪声不足。

7. 发明授权

US5912589A Arrangement for stabilizing the gain bandwidth product 失效
标题翻译：用于稳定增益带宽积的布置
公开(公告)号：US5912589A
公开(公告)日：1999-06-15
申请号：US883007
申请日：1997-06-26
申请人： John Michael Khoury , Angelo Rocco Mastrocola , Randall Russell Pratt
发明人： John Michael Khoury , Angelo Rocco Mastrocola , Randall Russell Pratt
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F3/45085 , H03F3/45278 , H03F2203/45286 , H03F2203/45456 , H03F2203/45466 , H03F2203/45471 , H03F2203/45476 , H03F2203/45508
摘要： A circuit for stabilizing the gain-bandwidth product of analog circuits containing bipolar devices which determine the gm is disclosed. The stabilization circuit is formed to generate a reference current that is proportional to a reference capacitance C.sub.S and the thermal voltage V.sub.T. The reference current is ultimately mirrored (as the bias current) into the bipolar devices which determine the gm within the analog circuit. Since the transconductance gm of a bipolar device can be expressed as collector current, I.sub.C, divided by V.sub.T, the thermal voltage factor of the bias current itself will "cancel" the thermal voltage factor present in the transconductance. The effects related to the remaining variable, the capacitance, will be eliminated as long as the reference capacitance is formed to "track" the analog circuit capacitance by using similar types of capacitance to implement both capacitors and forming both the stabilization circuit and the analog circuit on the same silicon chip. The stabilization circuit can be constructed in modular form and may include a module capable of creating a stabilized RC time constant that is likewise unchanged by variations in temperature or processing.
摘要翻译：公开了一种用于稳定包含确定gm的双极器件的模拟电路的增益带宽乘积的电路。形成稳定电路以产生与参考电容CS和热电压VT成比例的参考电流。最终将参考电流镜像（作为偏置电流）进入确定模拟电路内的gm的双极型器件。由于双极器件的跨导gm可以表示为集电极电流（IC）除以VT，因此偏置电流本身的热电压系数将“抵消”跨导中存在的热电压系数。只要参考电容形成为“跟踪”模拟电路电容，通过使用相似类型的电容来实现两个电容并形成稳定电路和模拟电路两者，就可以消除与剩余变量相关的影响，即电容。在同一个硅芯片上。稳定电路可以以模块化形式构造，并且可以包括能够产生稳定的RC时间常数的模块，其通过温度或处理的变化同样不变。

8. 发明授权

US5047665A Low noise, low offset, high speed CMOS differential amplifier 失效
标题翻译：低噪声，低失调，高速CMOS差分放大器
公开(公告)号：US5047665A
公开(公告)日：1991-09-10
申请号：US538974
申请日：1990-06-15
申请人： Rodney T. Burt
发明人： Rodney T. Burt
IPC分类号： H03F3/45 , H03M1/06 , H03M1/12 , H03M1/46
CPC分类号： H03F3/45188 , H03F2203/45456 , H03F2203/45462 , H03F2203/45508 , H03F2203/45652 , H03F2203/45702
摘要： A dual successive approximation analog-to-digital converter, including circuitry for generating separate reference voltages for each analog-to-digital converter, is integrated onto a single semiconductor chip. A single successive approximation register including a 19 bit shift register and two 18 bit latches and associated gating circuitry operates to produce two sets of 18 successive approximation numbers, one supplied as successive digital inputs to a CDAC of one of the analog-to-digital converters and the other set of successive approximation numbers being applied as digital inputs to a CDAC of the other analog-to-digital converter. A CMOS comparator includes two high speed, low gain differential amplifier stages, the first including cascode MOSFETs to provide a high power supply rejection. A pair of auto-zeroing capacitors and a pair of auto-zeroing MOSFETs operate on the outputs of the second differential amplifier to reduce input offset voltage, achieving high speed, low noise operation in a small amount of semiconductor chip area. The auto-zeroed output is supplied to the input of a two stage differential amplifier, the outputs of which also are auto-zeroed and applied to a differential CMOS latch, thereby providing a high speed, low noise, low offset CMOS comparator.
摘要翻译：包括用于为每个模数转换器产生单独参考电压的电路的双逐次逼近模数转换器被集成到单个半导体芯片上。包括19位移位寄存器和两个18位锁存器和相关门控电路的单个逐次逼近寄存器操作以产生两组18个逐次逼近数字，一组作为连续的数字输入提供给模数转换器之一的CDAC 并且另一组逐次逼近数字被用作数字输入到另一模数转换器的CDAC。 CMOS比较器包括两个高速，低增益差分放大器级，第一个包括共源共栅MOSFET，以提供高电源抑制。一对自动归零电容器和一对自动归零MOSFET在第二差分放大器的输出上工作，以减少输入失调电压，实现少量半导体芯片面积的高速度，低噪声运行。自动归零输出被提供给两级差分放大器的输入，它们的输出也被自动归零并应用于差分CMOS锁存器，从而提供高速，低噪声，低失调的CMOS比较器。

9. 发明授权

US09654071B2 Preamplifier circuit for a microelectromechanical capacitive acoustic transducer 有权
公开(公告)号：US09654071B2
公开(公告)日：2017-05-16
申请号：US15087630
申请日：2016-03-31
申请人： STMICROELECTRONICS S.R.L.
发明人： Filippo David , Igino Padovani
IPC分类号： H03F99/00 , H03F3/45 , H03F3/187 , H04R19/01 , G05F3/30 , H03F3/185 , H04R3/00 , H04R19/04 , H03F1/32
CPC分类号： H03F3/45179 , G05F3/30 , H03F1/3211 , H03F3/185 , H03F3/187 , H03F3/45 , H03F3/45183 , H03F3/45192 , H03F3/45475 , H03F3/45632 , H03F2200/03 , H03F2200/18 , H03F2200/213 , H03F2200/372 , H03F2200/447 , H03F2200/555 , H03F2203/45136 , H03F2203/45244 , H03F2203/45392 , H03F2203/45456 , H03F2203/45628 , H03F2203/45631 , H04R3/007 , H04R19/01 , H04R19/04 , H04R2201/003
摘要： Described herein is a preamplifier circuit for a capacitive acoustic transducer provided with a MEMS detection structure that generates a capacitive variation as a function of an acoustic signal to be detected, starting from a capacitance at rest; the preamplifier circuit is provided with an amplification stage that generates a differential output signal correlated to the capacitive variation. In particular, the amplification stage is an input stage of the preamplifier circuit and has a fully differential amplifier having a first differential input (INP) directly connected to the MEMS detection structure and a second differential input (INN) connected to a reference capacitive element, which has a value of capacitance equal to the capacitance at rest of the MEMS detection structure and fixed with respect to the acoustic signal to be detected; the fully differential amplifier amplifies the capacitive variation and generates the differential output signal.

10. 发明授权

US08760225B1 BiCMOS gate driver for class-S radio frequency power amplifier 有权
标题翻译：用于S类射频功率放大器的BiCMOS栅极驱动器
公开(公告)号：US08760225B1
公开(公告)日：2014-06-24
申请号：US13736442
申请日：2013-01-08
申请人： LSI Corporation
发明人： Ross S. Wilson , Said E. Abdelli , Peter Kiss , Donald R. Laturell , Kameran Azadet , James F. MacDonald
IPC分类号： H03F3/38
CPC分类号： H03F3/2171 , H03F3/193 , H03F3/195 , H03F3/245 , H03F3/305 , H03F3/45179 , H03F3/45183 , H03F2200/78 , H03F2203/45394 , H03F2203/45456 , H03F2203/45631 , H03F2203/45702
摘要： The invention may be embodied in a resynchronizing, push-pull drive circuit for driving the gate electrodes of a digital Class-S Radio Frequency Power Amplifier (RF-PA). A binary bitstream received from a bitstream generator, such as a sigma-delta modulator, Viterbi-based optimal-bit-pattern modulator sigma-delta, or other suitable modulator, is resynchronized to a low-jitter master clock, then converted to fast-rise, high-swing complementary digital signals to drive the gates of the Class-S RF-PA. The drive circuit provides a high slew-rate, large-swing, quasi-digital gate drive circuit to drive the significant gate capacitance of the RF-PA with sufficient rise times. A combination of bipolar transistor current switches and cascoded CMOS devices is employed to attain requisite performance. For example, the driving circuit is well suited for use with Class-S RF-PAs used in wireless communication systems.
摘要翻译：本发明可以体现在用于驱动数字S类射频功率放大器（RF-PA）的栅电极的再同步推挽驱动电路中。从比特流发生器（例如，Σ-Δ调制器，基于维特比的最佳位模式调制器Σ-Δ或其它合适的调制器）接收的二进制比特流被重新同步到低抖动主时钟，上升，高挥发互补数字信号驱动S-S RF-PA的门。驱动电路提供高压摆率，大摆幅，准数字栅极驱动电路，以足够的上升时间驱动RF-PA的显着栅极电容。采用双极晶体管电流开关和级联CMOS器件的组合来实现必要的性能。例如，驱动电路非常适用于无线通信系统中使用的S类RF-PA。

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