公开(公告)号：CA2728337A1

公开(公告)日：2010-01-14

申请号：CA2728337

申请日：2009-06-16

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03F3/217 ,  H03F1/00

Abstract: A method and apparatus for power conversion in a class D amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output rails. This minimizes the effects of off side charging and rail sag, as well as achieving good line regulation, while allowing use of very small, low value output capacitors.

公开(公告)号：CA2846321A1

公开(公告)日：2014-09-14

申请号：CA2846321

申请日：2014-03-13

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC ,  HUNTINGTON JARED

IPC: H03G3/20 ,  H03F3/183 ,  H03F3/45 ,  H03G3/30

Abstract: A simplified VCA circuit is presented. The VCA of the present invention uses fewer components and is less complex than prior art OTA-based VCAs. Further, the VCA of the present invention has improved total harmonic distortion (THD) and DC offset characteristics as compared to prior art VCAs. The VCA may be used to prevent clipping with the addition of clipping detection circuitry.

公开(公告)号：MX2009007325A

公开(公告)日：2009-07-17

申请号：MX2009007325

申请日：2008-01-24

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03K4/06

Abstract: Un generador de forma de onda triangular que incluye un circuito de reloj de forma de onda cuadrada y un integrador activo. El integrador activo que recibe entrada del circuito de reloj de forma de onda cuadrada y genera una salida de forma de onda triangular. Una red de retroalimentación activa es operativamente agregada al integrador activo para reducir el contenido de ruido de audio de banda en la salida de forma de onda triangular. La red de retroalimentación actúa como un balance de Corriente Directa DC (Direct Current) sin un sacrificio significante en la salida lineal de la forma de onda triangular.

公开(公告)号：CA2675303A1

公开(公告)日：2008-07-31

申请号：CA2675303

申请日：2008-01-24

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03K4/06

Abstract: A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the squa re waveform clock circuit and generates a triangular waveform output. An act ive feedback network is operatively added to the active integrator to reduce the audio band noise content in the triangular waveform output. The feedbac k network acts as a DC balance without significant sacrifice in the linearit y of the triangular waveform output.

公开(公告)号：CA2616220A1

公开(公告)日：2007-02-08

申请号：CA2616220

申请日：2006-07-28

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03F3/217

Abstract: The present invention provides lossless switching by configuring the output inductor so that the ripple current amplitude at load conditions results in small negative current during switching. The reconfigured output inductor results in increased ripple current amplitude. This increased ripple amplitu de may be further controlled using zero ripple steering techniques to eliminate ripple at the output capacitor. A ripple steering technique involves adding a secondary output to the class D amplifier which steers the switching ripple away from the main output thus substantially relieving the main output from a major artifact of prior art Class D amplifiers.

公开(公告)号：HK1126901A1

公开(公告)日：2009-09-11

申请号：HK09105761

申请日：2009-06-26

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03F20060101

公开(公告)号：MX2008001325A

公开(公告)日：2008-03-18

申请号：MX2008001325

申请日：2006-07-28

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03F3/217

Abstract: Las perdidas de conmutacion de amplificadores de clase D se reducen al evaluar el inductor de salida para proporcionar una amplitud de ondulacion mayor que la magnitud de la corriente de carga. La amplitud de ondulacion mayor resulta en este caso en corriente de inductor negativa en carga. La conmutacion en este caso de corriente de inductor negativa reduce al minimo la energia disipada. Un circuito de inductor acoplado se adiciona para conducir la ondulacion lejos del condensador de salida.

公开(公告)号：WO2007016428A3

公开(公告)日：2007-04-26

申请号：PCT/US2006029595

申请日：2006-07-28

Applicant: RGB SYSTEMS INC ,  MENDENHALL ERIC

Inventor： MENDENHALL ERIC

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F3/2173 ,  H03F2200/351 ,  H03F2200/459

Abstract: The present invention provides lossless switching by configuring the output inductor so that the ripple current amplitude at load conditions results in small negative current during switching. The reconfigured output inductor results in increased ripple current amplitude. This increased ripple amplitude may be further controlled using zero ripple steering techniques to eliminate ripple at the output capacitor. A ripple steering technique involves adding a secondary output to the class D amplifier which steers the switching ripple away from the main output thus substantially relieving the main output from a major artifact of prior art Class D amplifiers.

Abstract translation: 本发明通过配置输出电感器来提供无损切换，使得负载条件下的纹波电流幅度在切换期间导致小的负电流。 重新配置的输出电感导致纹波电流幅度增加。 可以使用零纹波转向技术来进一步控制增加的纹波幅度，以消除输出电容器处的纹波。 波纹转向技术涉及将二次输出添加到D类放大器中，其将开关纹波转向远离主输出，从而基本上将主输出从现有技术的D类放大器的主要伪影中消除。

公开(公告)号：WO2008092033A8

公开(公告)日：2009-08-13

申请号：PCT/US2008051954

申请日：2008-01-24

Applicant: RGB SYSTEMS INC ,  MENDENHALL ERIC

Inventor： MENDENHALL ERIC

IPC: H03K4/06

CPC classification number: H03K4/90 ,  H03F3/217 ,  H03K4/06 ,  H03K5/06

Abstract: A triangular waveform generator includes a square waveform clock circuit and an active integrator. The active integrator receives input from the square waveform clock circuit and generates a triangular waveform output. An active feedback network is operatively added to the active integrator to reduce the audio band noise content in the triangular waveform output. The feedback network acts as a DC balance without significant sacrifice in the linearity of the triangular waveform output.

Abstract translation: 三角形波形发生器包括方波形时钟电路和有源积分器。 有源积分器从方波形时钟电路接收输入，并产生三角形波形输出。 主动反馈网络可操作地添加到有源积分器，以减小三角形波形输出中的音频带噪声含量。 反馈网络作为直流平衡，不会对三角波形输出的线性度产生重大牺牲。

公开(公告)号：EP2301149A4

公开(公告)日：2011-11-02

申请号：EP09794768

申请日：2009-06-16

Applicant: RGB SYSTEMS INC

Inventor： MENDENHALL ERIC

IPC: H03F3/217 ,  H02M3/335

CPC classification number: H03F3/2173 ,  H02M3/33592 ,  H02M5/4585 ,  H03F3/217 ,  H03F3/2171 ,  H03F2200/03 ,  H03F2200/504 ,  H03F2203/21193 ,  Y02B70/1475