公开(公告)号：US06211716B1

公开(公告)日：2001-04-03

申请号：US09322247

申请日：1999-05-28

申请人： Hai T. Nguyen ,  Menping Chang

发明人： Hai T. Nguyen ,  Menping Chang

IPC分类号： H03L500

CPC分类号： H03F3/45973 ,  H04L25/064

摘要： An apparatus of compensating for offset in a received signal generated from a forward path stage, includes a first peak detector for receiving a first signal from the forward path stage and capable of detecting a peak of the first signal; a second peak detector for receiving a second signal from the forward path stage and capable of detecting a peak of the second signal; a differential amplifier coupled to the first peak detector and the second peak detector and capable of generating an offset control signal; and a compensation stage coupled to the differential amplifier and capable of compensating for offset in the received signal in response to the offset control signal. A method of compensating for offset in a received signal includes detecting a level of a first signal from a forward path stage; detecting a level of a second signal from the forward path stage; and generating an offset control signal to reduce an offset in the received signal in response to the level difference of the first signal and the second signal.

摘要翻译： 补偿从正向路径级产生的接收信号中的偏移的装置包括：第一峰值检测器，用于从前向路径级接收第一信号并且能够检测第一信号的峰值; 第二峰值检测器，用于从前向路径级接收第二信号，并能够检测第二信号的峰值; 差分放大器，其耦合到所述第一峰值检测器和所述第二峰值检测器，并且能够产生偏移控制信号; 以及补偿级，其耦合到差分放大器并且能够响应于偏移控制信号补偿接收信号中的偏移。 补偿接收信号中的偏移的方法包括检测来自前向路径级的第一信号的电平; 从前向路径级检测第二信号的电平; 以及产生偏移控制信号，以响应于第一信号和第二信号的电平差来减小接收信号中的偏移。

公开(公告)号：US06232802B1

公开(公告)日：2001-05-15

申请号：US09321938

申请日：1999-05-28

申请人： Menping Chang ,  Hai T. Nguyen

发明人： Menping Chang ,  Hai T. Nguyen

IPC分类号： G01R1900

CPC分类号： G01R19/04

摘要： An apparatus for tracking a peak level of an input signal includes a comparator for comparing the peak level of the input signal with a reference peak voltage signal. A sample and block circuit is coupled to the output of the comparator and is capable of sampling a portion of the input signal. The sampled portion of the input signal is defined by a smart window (timing window) which is received by the sample and block circuit. The sample and block circuit controls a charge pump that determines the level of the reference peak voltage signal. A method of generating a reference peak voltage signal includes receiving an input data, generating a timing window based upon the input data to define a sampling portion in the input data, comparing a level of the reference peak voltage signal with a level of the sampling portion in the input data, and determining a level of the reference peak voltage signal based upon the comparing step.

摘要翻译： 用于跟踪输入信号的峰值电平的装置包括用于将输入信号的峰值电平与参考峰值电压信号进行比较的比较器。 采样和电路电路耦合到比较器的输出端，并能够对输入信号的一部分进行采样。 输入信号的采样部分由采样和块电路接收的智能窗口（定时窗口）定义。 样品和块电路控制电荷泵，其确定参考峰值电压信号的电平。 产生参考峰值电压信号的方法包括接收输入数据，基于输入数据产生定时窗口，以定义输入数据中的采样部分，将参考峰值电压信号的电平与采样部分的电平进行比较 在所述输入数据中，并且基于所述比较步骤确定所述参考峰值电压信号的电平。

公开(公告)号：US5730254A

公开(公告)日：1998-03-24

申请号：US505756

申请日：1995-07-21

申请人： Hai T. Nguyen

发明人： Hai T. Nguyen

IPC分类号： B66B13/12 ,  B66B13/16 ,  B66B13/06

CPC分类号： B66B13/16 ,  B66B13/12

摘要： An elevator car door restraint includes a position indicator mounted at the access points at each of the floors, a locking arm pivotally mounted between its ends on a first portion of the car for movement of the first end of the locking arm between an engaged and disengaged position, and for contact by the second end of the locking arm with one of the position indicators. A lock plate mounted on the second portion of the car which moves relative to the first portion of the car when the car door moves includes a contact face which is engageable with the first end of the locking arm when the first end is moved to the engaged position to mechanically restrain the elevator car door from opening. The locking arm is biased by a spring so that the first end of the arm is rotated into engagement position unless the first end is permitted from such rotation by contact of the second end with a position indicator. An integral hoistway interlock for center-parting the hoistway access doors is also provided. The hoistway interlock includes a rotating keeper mounted on one of the hoistway doors and a stationary keeper which is mounted on the other hoistway door. When the hoistway access doors are closed, the rotating keeper rotates into engagement with the stationary keeper, thereby locking the access doors. A kickpad mounted on one end of the rotating keeper includes a cam surface which rotates the rotating keeper out of engagement with the stationary keeper when the kickpad itself is rotated within the passageway between the engagement blades as the engagement blades move into coupling engagement with the kickpad during normal opening of the elevator doors.

摘要翻译： 电梯轿厢门限制器包括安装在每个楼层的接入点处的位置指示器，锁定臂枢转地安装在轿厢的第一部分的端部之间，用于使锁定臂的第一端在接合和分离之间移动 位置，并且由锁定臂的第二端与其中一个位置指示器接触。 当轿厢门移动时，安装在轿厢的第二部分上的相对于轿厢的第一部分移动的锁板包括当第一端移动到接合位置时可与锁定臂的第一端接合的接触面 机械地限制电梯轿厢门打开的位置。 锁定臂由弹簧偏置，使得臂的第一端旋转到接合位置，除非通过第二端与位置指示器的接触允许第一端被这种旋转。 还提供了一体的井道联锁，用于将井道通道门中心分隔开。 井道互锁包括安装在井道门之一上的旋转保持器和安装在另一个井道门上的固定保持器。 当井道通道门关闭时，旋转保持器旋转成与静止保持器接合，从而锁定通道门。 安装在旋转保持器的一端上的踢脚板包括凸轮表面，当凸轮板本身在接合叶片之间的通道内旋转时，当接合叶片移动成与踢脚板的联接接合时，该凸轮表面使旋转保持器与静止保持器脱离接合 正常打开电梯门。

公开(公告)号：USD816422S1

公开(公告)日：2018-05-01

申请号：US29592146

申请日：2017-01-27

申请人： Hai T. Nguyen

设计人： Hai T. Nguyen

公开(公告)号：US10030903B2

公开(公告)日：2018-07-24

申请号：US15187892

申请日：2016-06-21

申请人： Hai T. Nguyen

发明人： Hai T. Nguyen

IPC分类号： F25D3/08

摘要： A mechanical apparatus comprised of a plurality of pods in the form of an annular cylindrical sleeve. All pods containing liquid are to be frozen for the purpose of dynamically transfer/impart its charged thermal energy to a directly contacted beverage object placed within. The pods are joined to each other by latitudinal elastic bands allowing it to expand readily and grip onto varying size beverage containers. Furthermore, the plurality of pods and a beverage container are disposed in an insulated holder; a sealable cap is then inserted to seal off and insulate the discharging of thermal energy therein from ambient conditions. A beverage in the form of can or bottle might be placed in the apparatus to achieve desired chill temperature for an extended length of time in high ambient temperature conditions.

公开(公告)号：US6032762A

公开(公告)日：2000-03-07

申请号：US129719

申请日：1998-08-05

申请人： Timothy P. O'Donnell ,  Hai T. Nguyen

发明人： Timothy P. O'Donnell ,  Hai T. Nguyen

IPC分类号： B66B13/08 ,  E05D15/06 ,  E05F15/06 ,  E05F15/14 ,  E05F17/00 ,  B66B13/14

CPC分类号： B66B13/08 ,  E05D15/063 ,  E05F15/53 ,  E05F15/56 ,  E05F15/616 ,  E05F15/635 ,  E05F15/649 ,  E05F17/004 ,  E05F15/652 ,  E05Y2201/684 ,  E05Y2201/686 ,  E05Y2800/266 ,  E05Y2900/104

摘要： An elevator door operator for positioning elevator doors along an arcuate pathway includes a linearly displaceable actuator and a pair of linkage arms, each pivotally connected to the other and connected to one end of the linearally displaceable actuator. The linkage arms are also each pivotally connected at their opposite ends to each of two support arms, each of which support arms are pivotally connected at one of their ends to each other and secured at their opposite ends, respectively to each of the door panels. The door operator may be provided as part of a door assembly which additionally includes an upper guide track comprising an elongate bar including at least two generally planar support surfaces, which guide track is mounted above the door opening to define an arcuate door travel pathway, two door panels, suspended from the upper guide track via a carriage assembly which includes a carriage frame and at least two wheels each supported by, and in rolling contact with, at least two of the support surfaces on the guide track, and a hinge pin extending from the carriage frame to pivotally connect the carriage assembly to the door panel. One embodiment operates a single door for positioning along an arcuate pathway.

摘要翻译： 用于沿着弓形路径定位电梯门的电梯门操作器包括线性可移动的致动器和一对连接臂，每个连杆臂可枢转地连接到另一个并连接到可线性可移动致动器的一端。 连接臂也各自在其相对端处枢转地连接到两个支撑臂中的每一个，每个支撑臂的一个支撑臂在其一个端部彼此枢转地彼此枢转地连接并且在其相对端分别固定到每个门板。 门操作者可以设置为门组件的一部分，该门组件另外包括上导轨，该上导轨包括细长杆，该细长杆包括至少两个大致平面的支撑表面，该导轨安装在门开口上方以限定弓形门行进路径，二 门板通过支架组件悬挂在上导轨上，托架组件包括支架框架和至少两个轮，每个轮由导轨上的至少两个支撑表面支撑并与滚动接触;以及铰链销， 从托架框架将托架组件枢转地连接到门板。 一个实施例操作单个门以沿着弧形路径定位。

公开(公告)号：US5486777A

公开(公告)日：1996-01-23

申请号：US301462

申请日：1994-09-07

申请人： Hai T. Nguyen

发明人： Hai T. Nguyen

IPC分类号： H03K19/0185 ,  H04L25/02 ,  H03K19/0948

CPC分类号： H04L25/0272 ,  H03K19/018521 ,  H04L25/0292

摘要： A low power differential receiver input stage using n-channel/p-channel transistor pairs to adjust the voltage levels of differential output signals. A first n-channel/p-channel transistor pair is connected to a first output terminal and a second n-channel/p-channel transistor pair is connected to a second output terminal. First and second differential signals respectively applied to first and second input terminals are passed to the first and second output terminals through first and second resistors, respectively. The first differential signal is applied to the gates of the second n-channel/p-channel transistor pair, thereby adjusting the voltage level at the second output terminal. Similarly, the second differential signal is applied to the gates of the first n-channel/p-channel transistor pair, thereby adjusting the voltage level at the first output terminal.

摘要翻译： 低功耗差分接收器输入级，使用n沟道/ p沟道晶体管对来调节差分输出信号的电压电平。 第一n沟道/ p沟道晶体管对连接到第一输出端，​​第二n沟道/ p沟道晶体管对连接到第二输出端。 分别施加到第一和第二输入端子的第一和第二差分信号分别通过第一和第二电阻器传送到第一和第二输出端子。 第一差分信号被施加到第二n沟道/ p沟道晶体管对的栅极，由此调节第二输出端子处的电压电平。 类似地，第二差分信号被施加到第一n沟道/ p沟道晶体管对的栅极，从而调节第一输出端子处的电压电平。