公开(公告)号：US07061912B1

公开(公告)日：2006-06-13

申请号：US10052311

申请日：2002-01-17

Applicant: Krishnasamy Anandakumar ,  Jonathon Cheah

Inventor： Krishnasamy Anandakumar ,  Jonathon Cheah

IPC: H04L12/56

CPC classification number: G10L19/005 ,  G10L19/09

Abstract: An apparatus and methods for concealing missing packets in a CVSD bit stream are disclosed. In one embodiment, an indication from a packet loss indicator (PLI) that a packet is missing is received. Next the status of the missing packet is determined. Based on the status of the missing packet, a sample packet is generated to replace the missing packet, and a memory of the CVSD is updated. A compressed copy of the sample packet may be stored in a first memory buffer in either μ-law or a-law format.

Abstract translation: 公开了一种用于隐藏CVSD比特流中的丢失分组的装置和方法。 在一个实施例中，接收到来自分组丢失指示符（PLI）的指示丢失分组。 接下来确定丢失数据包的状态。 根据丢失数据包的状态，生成一个样本数据包来替换丢失的数据包，并更新CVSD的存储器。 样本分组的压缩副本可以以mu律或者a律格式存储在第一存储器缓冲器中。

公开(公告)号：US06898750B2

公开(公告)日：2005-05-24

申请号：US10052063

申请日：2002-01-16

Applicant: Jonathon Cheah ,  Chee Kwang Quek ,  Ee Hong Kwek

Inventor： Jonathon Cheah ,  Chee Kwang Quek ,  Ee Hong Kwek

IPC: G01R31/28 ,  G06F11/00

CPC classification number: G01R31/2884

Abstract: An in-chip monitoring method and apparatus are disclosed. In one embodiment the apparatus includes a test pad, a transmission gate and a plurality of test components coupled to the transmission gate. The transmission gate is attached to a substrate and adapted to receive a code word uniquely addressed to one of the plurality of test components. In a further embodiment, the transmission gate is further adapted to relay an output of the one of the plurality of test components to the test pad, in response to receipt of the code word.

Abstract translation: 公开了片内监视方法和装置。 在一个实施例中，该装置包括耦合到传输门的测试焊盘，传输门和多个测试部件。 传输门被附接到衬底并且适于接收唯一地寻址到多个测试部件之一的代码字。 在另一实施例中，响应于接收到代码字，传输门还适于将多个测试组件中的一个的输出中继到测试板。

公开(公告)号：US06674409B2

公开(公告)日：2004-01-06

申请号：US10016178

申请日：2001-12-05

Applicant: Jonathon Cheah

Inventor： Jonathon Cheah

IPC: H01Q928

CPC classification number: H01Q1/243 ,  H01L24/45 ,  H01L2224/45144 ,  H01L2224/48091 ,  H01L2924/01013 ,  H01L2924/01079 ,  H01L2924/14 ,  H01L2924/3011 ,  H01Q1/38 ,  H01L2924/00014

Abstract: An antenna assembly and methods of use are disclosed. In one embodiment, the antenna assembly is formed on a substrate and includes a first metal region and a second metal region attached to a surface of the substrate. The second metal region may be separated from the first metal region by a gap. The second metal region may include a first pronged end and a second end that correspond, respectively, to a first pronged end and a second end of the first metal region. The pronged ends of each metal region are connected to the differential inputs and outputs of a transceiver coupled with the antenna assembly.

Abstract translation: 公开了天线组件和使用方法。 在一个实施例中，天线组件形成在基板上，并且包括附接到基板的表面的第一金属区域和第二金属区域。 第二金属区域可以与第一金属区域间隔开。 第二金属区域可以包括分别对应于第一金属区域的第一末端和第二末端的第一末端和第二末端。 每个金属区域的插脚端连接到与天线组件耦合的收发器的差分输入和输出。

公开(公告)号：US5309479A

公开(公告)日：1994-05-03

申请号：US692883

申请日：1991-04-29

Applicant: Jonathon Cheah

Inventor： Jonathon Cheah

IPC: H03D7/16 ,  H04B1/04 ,  H04L27/12

CPC classification number: H03D7/161 ,  H04B2001/0491

Abstract: A Ku band frequency signal transmitter using a minimum of Ku band signal processing components is shown. Inexpensive generation of Ku band signals is provided by frequency multiplying high power, lower frequency signals to a final Ku band signal frequency. The transmitter generates an intermediate frequency signal from a baseband modulated signal and a high frequency local oscillator signal. The baseband signal is FSK modulated and has a constant envelope. A dividing stage reduces the baseband frequency signal to improve the spectral purity of the final Ku band output signal.

Abstract translation: 示出了使用Ku波段信号处理部件的Ku波段频率信号发送器。 通过将高功率，较低频率信号乘以最终的Ku波段信号频率来提供低成本的Ku波段信号。 发射机从基带调制信号和高频本地振荡器信号产生中频信号。 基带信号被FSK调制并具有恒定的包络线。 分频级降低了基带频率信号，以提高最终的Ku波段输出信号的频谱纯度。

公开(公告)号：US07236758B1

公开(公告)日：2007-06-26

申请号：US10360481

申请日：2003-02-07

Applicant: Jonathon Cheah ,  John Kwok

Inventor： Jonathon Cheah ,  John Kwok

IPC: H04B1/06 ,  H04B1/28

CPC classification number: H04B1/40

Abstract: An integrated circuit having a transmit chain configured to provide direct FM modulation of a voltage controlled oscillator of a frequency synthesizer by a composite signal that includes audio and video components, and a receive chain configured to provide a television compatible modulated signal having audio and video information. The receive chain can display locally transmitted signals.

Abstract translation: 一种具有发射链的集成电路，其被配置为通过包括音频和视频分量的复合信号提供频率合成器的压控振荡器的直接FM调制，以及被配置为提供具有音频和视频信息的电视兼容调制信号的接收链 。 接收链可以显示本地发送的信号。

公开(公告)号：US06677814B2

公开(公告)日：2004-01-13

申请号：US10051416

申请日：2002-01-17

Applicant: Eng Chuan Low ,  Jonathon Cheah ,  Shih-Tsung Yang ,  Christopher Yong Soon Fatt

Inventor： Eng Chuan Low ,  Jonathon Cheah ,  Shih-Tsung Yang ,  Christopher Yong Soon Fatt

IPC: H03B100

CPC classification number: H03H21/0001

Abstract: Tuning of a filter circuit is accomplished by determining a real RC time constant value for the filter circuit, then comparing the real RC vale to a predetermined RC value. If the real RC value does not match the predetermined RC value, the real RC value is varied (e.g. using a number of capacitors in a capacitor arr

Abstract translation: 通过确定滤波电路的实际RC时间常数值，然后将实际RC值与预定的RC值进行比较来实现滤波器电路的调谐。 如果真正的RC值与预定的RC值不匹配，则实际的RC值是变化的（例如，使用电容器中的多个电容器

公开(公告)号：US07286599B1

公开(公告)日：2007-10-23

申请号：US10384292

申请日：2003-03-06

Applicant: Jonathon Cheah

Inventor： Jonathon Cheah

IPC: H03K7/08

CPC classification number: H04B1/71632

Abstract: An ultra wide band (UWB) communication system includes a channel filter bank to cover the 3.1 to 10.6 GHz band in channels having approximately equal bandwidth. A transmitter and a receiver may share the filter bank when the communication system is configured as a transceiver. The transmitter produces short duration, wide bandwidth RF pulses by triggering the impulse response of one or more of the filters of the filter bank. The impulse response is triggered by applying a very short duration time domain signal produced using a single pulse mixer and a step recovery diode circuit. The receiver uses a square-law detector to detect RF signals passed by the channel filter bank and the detected signals are further processed to extract a data signal and a confidence level in the data signal.

Abstract translation: 超宽带（UWB）通信系统包括通道滤波器组，以在具有大致相等带宽的信道中覆盖3.1至10.6GHz频带。 当通信系统被配置为收发器时，发射器和接收器可以共享滤波器组。 发射器通过触发滤波器组的一个或多个滤波器的脉冲响应来产生短持续时间的宽带宽RF脉冲。 通过应用使用单个脉冲混频器和阶跃恢复二极管电路产生的非常短的持续时间的时域信号来触发脉冲响应。 接收机使用平方律检测器来检测由信道滤波器组通过的RF信号，并且进一步处理检测到的信号以提取数据信号中的数据信号和置信度。

公开(公告)号：US06888905B1

公开(公告)日：2005-05-03

申请号：US10027281

申请日：2001-12-20

Applicant: Jonathon Cheah ,  Jianping Pan ,  Le Luong

Inventor： Jonathon Cheah ,  Jianping Pan ,  Le Luong

IPC: H04L7/033 ,  H04L7/00

CPC classification number: H04L7/0331 ,  H04L7/0041

Abstract: A wireless receiver e.g., a Bluetooth-compatible receiver or a receive chain in a Bluetooth-compatible transceiver, includes a discriminator unit and a timing recovery unit. The output of the discriminator unit is provided as an input to the timing recovery unit, which timing recovery unit is configured to align a free-running clock of the receiver with a received signal to extract received data therefrom.

Abstract translation: 蓝牙兼容收发器中的无线接收器（例如蓝牙兼容接收机或接收链）包括鉴别器单元和定时恢复单元。 鉴别器单元的输出被提供给定时恢复单元的输入，该定时恢复单元被配置为使接收机的自由运行时钟与接收信号对齐，以从中提取接收到的数据。

公开(公告)号：US06864746B2

公开(公告)日：2005-03-08

申请号：US10346918

申请日：2003-01-17

Applicant: Jonathon Cheah ,  Eng Chuan Low

Inventor： Jonathon Cheah ,  Eng Chuan Low

IPC: H03F3/45 ,  H03G1/00 ,  H03G3/00

CPC classification number: H03G3/001 ,  H03F3/45201 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45386 ,  H03F2203/45506 ,  H03F2203/45728 ,  H03G1/0029 ,  H03G1/0088

Abstract: A dual gain amplification low noise amplifier that includes an amplification circuit to a provide dual gain amplification—high gain amplification for a weak data signal and low gain amplification for a strong data signal. Also included is a control circuit to maintain approximately the same P1dB point for the weak signal during high gain amplification as for the strong signal during low gain amplification.

Abstract translation: 双增益放大低噪声放大器，包括放大电路，为弱数据信号提供双增益放大 - 高增益放大，强数据信号提供低增益放大。 还包括一个控制电路，用于在高增益放大期间为弱信号保持大致相同的P1dB点，对于低增益放大期间的强信号。

公开(公告)号：US20050046506A1

公开(公告)日：2005-03-03

申请号：US10964837

申请日：2004-10-13

Applicant: Shih-Tsung Yang ,  Jonathon Cheah ,  Ee Kwek ,  Chun-Yip Lau

Inventor： Shih-Tsung Yang ,  Jonathon Cheah ,  Ee Kwek ,  Chun-Yip Lau

IPC: H03L7/089 ,  H03L7/099 ,  H03L7/189 ,  H03L7/00

CPC classification number: H03L7/099 ,  H03J2200/10 ,  H03L7/0898 ,  H03L7/189

Abstract: A method and apparatus for tuning a VCO circuit to provide desired modulations is described. In one embodiment, the method of the present invention uses a controlled voltage from a digital-to-analog converter to obtain VCO voltage/frequency characteristics. The VCO voltage/frequency characteristics are used to determine a VCO capacitance value as well as a charge pump current level for each frequency band of interest. For one embodiment, the VCO circuit includes a bank of switchable capacitors used to set the VCO capacitance value. The charge pump includes a number of switch-controlled current meters to set the charge pump current level. The VCO capacitors and charge pump current meters are controlled by an off-chip CPU.

Abstract translation: 描述了一种用于调谐VCO电路以提供所需调制的方法和装置。 在一个实施例中，本发明的方法使用来自数模转换器的受控电压来获得VCO电压/频率特性。 VCO电压/频率特性用于确定VCO电容值以及感兴趣的每个频带的电荷泵电流电平。 对于一个实施例，VCO电路包括用于设置VCO电容值的一组可切换电容器。 电荷泵包括多个开关控制的电流表，用于设置电荷泵电流水平。 VCO电容和电荷泵电流表由片外CPU控制。