公开(公告)号：US09306448B2

公开(公告)日：2016-04-05

申请号：US14174553

申请日：2014-02-06

Applicant: Wolfson Microelectronics plc

Inventor： John P. Lesso ,  John L. Pennock ,  Peter J. Frith

IPC: H03F99/00 ,  H02M3/07 ,  H03F1/02 ,  H03F3/187 ,  H03F3/68 ,  H03F3/185 ,  H03G1/00

CPC classification number: H02M3/07 ,  H03F1/025 ,  H03F3/185 ,  H03F3/187 ,  H03F3/68 ,  H03F2200/507 ,  H03F2200/511 ,  H03G1/0017 ,  H03G1/0029 ,  H03G1/0088 ,  H03G1/0094

Abstract: A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path for generating the output signal, the output stage having a gain that is substantially independent of its supply voltage, and a variable voltage power supply comprising a charge pump for providing positive and negative output voltages, the charge pump comprising a network of switches that is operable in a number of different states and a controller for operating the switches in a sequence of the states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage.

公开(公告)号：US09575116B2

公开(公告)日：2017-02-21

申请号：US14156723

申请日：2014-01-16

Applicant: Wolfson Microelectronics plc

Inventor： Colin Findlay Steele ,  John L. Pennock

IPC: G01R31/08 ,  G01R31/12 ,  G01R31/28 ,  H04R29/00 ,  H04R19/00

CPC classification number: G01R31/2829 ,  B81B7/008 ,  B81C99/004 ,  G01R31/2884 ,  H01L2224/05554 ,  H01L2224/48091 ,  H01L2224/48137 ,  H04R19/005 ,  H04R29/004 ,  H04R2201/003 ,  H01L2924/00014

Abstract: A method of testing a capacitive transducer circuit, for example a MEMS capacitive transducer, by applying a test signal via one or more capacitors provided in the transducer circuit.

Abstract translation: 通过经由设置在换能器电路中的一个或多个电容器施加测试信号来测试电容式换能器电路，例如MEMS电容换能器的方法。

公开(公告)号：US20140152388A1

公开(公告)日：2014-06-05

申请号：US14174553

申请日：2014-02-06

Applicant: WOLFSON MICROELECTRONICS PLC

Inventor： John P. Lesso ,  John L. Pennock ,  Peter J. Frith

IPC: H02M3/07 ,  H03F3/185 ,  H03G1/00

CPC classification number: H02M3/07 ,  H03F1/025 ,  H03F3/185 ,  H03F3/187 ,  H03F3/68 ,  H03F2200/507 ,  H03F2200/511 ,  H03G1/0017 ,  H03G1/0029 ,  H03G1/0088 ,  H03G1/0094

Abstract: A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path for generating the output signal, the output stage having a gain that is substantially independent of its supply voltage, and a variable voltage power supply comprising a charge pump for providing positive and negative output voltages, the charge pump comprising a network of switches that is operable in a number of different states and a controller for operating the switches in a sequence of the states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage.

Abstract translation: 一种信号放大电路及相关的方法和装置，所述电路包括：从输入端延伸到输出端的信号路径;增益控制器，被配置为响应于控制信号控制沿着信号路径施加的增益; 用于产生输出信号的信号路径内的输出级，输出级具有基本上与其电源电压无关的增益;以及可变电压电源，包括用于提供正和负输出电压的电荷泵，所述电荷泵包括 可操作于多个不同状态的开关网络和用于以一系列状态操作开关的控制器，以便将跨越大致等于输入电压的电压产生正和负输出电压。