公开(公告)号：US08542037B2

公开(公告)日：2013-09-24

申请号：US13355749

申请日：2012-01-23

Applicant: Ben Choy ,  Ching Chu

Inventor： Ben Choy ,  Ching Chu

IPC: H03K3/00

CPC classification number: H03F3/2173 ,  B06B1/0215 ,  B06B2201/76 ,  G01S7/5202 ,  H03K17/6872

Abstract: A multi-level high-voltage pulse generator integrated circuit has a digital logic-level control interface circuit. A pair of complementary MOSFETs is controlled by the digital control interface circuit. A pair of supply voltage rails is provided, wherein one of the pair of supply voltage rails is connected to each of the pair of complementary MOSFETs. A pair of Zener diodes is provided, wherein one of the pair of Zener diodes is connected to each of the pair of complementary MOSFETs. A pair of resistors is provided, wherein one of the pair of resistors is connected in parallel with each of the pair of Zener diodes. A pair of complementary voltage blocking-MOSFETs having predetermined gate bias voltages is provided, wherein each of the pair complementary voltage blocking-MOSFETs is attached to a corresponding one pair of complementary MOSFETs.

Abstract translation: 多级高压脉冲发生器集成电路具有数字逻辑电平控制接口电路。 一对互补MOSFET由数字控制接口电路控制。 提供一对电源电压轨，其中一对电源电压轨之一连接到该对互补MOSFET中的每一对。 提供了一对齐纳二极管，其中一对齐纳二极管中的一个连接到该对互补MOSFET中的每一对。 提供一对电阻器，其中一对电阻器中的一个电阻器与该对齐纳二极管中的每一个并联连接。 提供了具有预定栅极偏置电压的一对互补电压阻挡MOSFET，其中每对互补电压阻挡MOSFET被附接到相应的一对互补MOSFET。

公开(公告)号：US08198922B1

公开(公告)日：2012-06-12

申请号：US12775242

申请日：2010-05-06

Applicant: Ching Chu

Inventor： Ching Chu

IPC: H03K3/00

CPC classification number: G10K11/345 ,  B06B1/023

Abstract: A digital switched current source is coupled to a programmable current source-driver and controlled by waveforms stored in the programmable and floating complementary sourcing and sinking current source-driver. A plurality of complementary P- and N-MOSFET is coupled to the programmable floating current source driver. The transformer-less programmable ultrasound transmit beamformer integrated circuit is provided and directly coupled to the plurality of transducers.

Abstract translation: 数字开关电流源耦合到可编程电流源驱动器，并由存储在可编程和浮置互补电源和吸收电流源驱动器中的波形控制。 多个互补的P型和N-MOSFET耦合到可编程浮动电流源驱动器。 无变压器可编程超声波发射波束形成器集成电路被提供并直接耦合到多个换能器。

公开(公告)号：US5422643A

公开(公告)日：1995-06-06

申请号：US21435

申请日：1993-02-24

Applicant: Ching Chu ,  Steven Prowse ,  John Haywood

Inventor： Ching Chu ,  Steven Prowse ,  John Haywood

IPC: G01M11/00 ,  H03M1/18

CPC classification number: G01M11/3145 ,  H03M1/187

Abstract: A digitizer suitable for digitizing input signals having a high dynamic range. The digitizer is microprocessor controlled and comprises an input stage, a multi-channel attenuator or amplifier bank, a multiplexer and a analog-to-digital (A/D) converter. The function of the multi-channel bank is to move the input signal within the range of the A/D converter. The input signal to be digitized is fed through the input stage to each of the channels in the attenuator bank. The signal is scaled by each respective channel in the attenuator bank. The multiplexer is used to switch the scaled signal which is within the range of the A/D converter for digitizing. The digitized sample is then corrected according to the attenuation or gain factor of the scaled channel. The digitizer includes a comparator bank which is used to determine the channel with the widest signal range within the range of the A/D converter. The digitizer also includes a channel calibrator for calibrating the actual gain or attenuation of each channel. In another aspect, the digitizer can be implemented using an optical front-end comprising an optical beam splitter, optical attenuators and amplifier banks. The optical front-end provides improved noise immunity and faster speed of operation.

Abstract translation: 适用于数字化具有高动态范围的输入信号的数字转换器。 数字转换器由微处理器控制，包括输入级，多通道衰减器或放大器组，多路复用器和模拟（A / D）转换器。 多通道组的功能是在A / D转换器的范围内移动输入信号。 要被数字化的输入信号通过输入级馈送到衰减器组中的每个通道。 信号由衰减器组中的每个相应通道进行缩放。 多路复用器用于切换在A / D转换器范围内的缩放信号进行数字化。 然后根据缩放的通道的衰减或增益因子校正数字化采样。 数字转换器包括一个比较器组，用于确定A / D转换器范围内最宽信号范围的通道。 数字转换器还包括用于校准每个通道的实际增益或衰减的通道校准器。 在另一方面，可以使用包括光分束器，光衰减器和放大器组的光学前端来实现数字化仪。 光学前端提供更好的抗噪声能力和更快的操作速度。

公开(公告)号：US5029955A

公开(公告)日：1991-07-09

申请号：US512186

申请日：1990-04-20

Applicant: Ching Chu

Inventor： Ching Chu

IPC: G02B26/10

CPC classification number: G02B26/10

Abstract: An optical scanner has a light distributor rotating about an axis spaced from but parallel to the optical axis of at light source. Lenses are mounted on a carrier that rotates about the optical axis. The distributor and carrier rotate a the same angular velocity and are arranged so that the lens and associated distributor move across the media at the same time. By rotating the lens about the optical axis, the scanning beam remains in the central zone of the lens as it passes across the media.

Abstract translation: 光学扫描器具有围绕与光源的光轴间隔开但平行的轴线旋转的光分布器。 透镜安装在围绕光轴旋转的载体上。 分配器和载体旋转相同的角速度并且被布置成使得透镜和相关联的分配器同时移动通过介质。 通过围绕光轴旋转透镜，扫描光束在穿过介质时保持在透镜的中心区域中。