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1. 发明授权

US06747987B1 Transmit modulation circuit and method of operating a transmitter 失效
标题翻译：发射调制电路和操作发射机的方法
公开(公告)号：US06747987B1
公开(公告)日：2004-06-08
申请号：US09514804
申请日：2000-02-29
申请人： Richard B. Meador , Joshua E. Dorevitch , Quang C. Le , Charles H. Matsumoto , David H. Minasi
发明人： Richard B. Meador , Joshua E. Dorevitch , Quang C. Le , Charles H. Matsumoto , David H. Minasi
IPC分类号： H04J316
CPC分类号： H03C3/095 , H03C3/0933 , H03J1/0008 , H03L7/0893 , H03L7/099 , H03L7/10 , H03L7/1976
摘要： A transmitter (100) includes a fractional N synthesizer, a baseband digital modulation stage coupled to the fractional N synthesizer in a first modulation mode, and a baseband I/Q modulation stage also coupled to the fractional N synthesizer and reusing the fractional N synthesizer in a second modulation mode. A method (300) of operating a transmitter includes transmitting a first signal from a transmitter using the fractional N synthesizer and the baseband digital modulation stage to modulate the first signal according to a first wireless protocol. The method (300) also includes transmitting a second signal from the transmitter using the baseband I/Q modulation stage and the fractional N synthesizer to modulate the second signal according to a second wireless protocol.
摘要翻译：发射机（100）包括分数N个合成器，以第一调制模式耦合到分数N个合成器的基带数字调制级，以及还耦合到分数N个合成器的基带I / Q调制级，并且重新使用分数N个合成器第二调制模式。操作发射机的方法（300）包括使用分数N个合成器和基带数字调制级从发射机发射第一信号，以根据第一无线协议对第一信号进行调制。方法（300）还包括使用基带I / Q调制级和小数N合成器从发射机发送第二信号，以根据第二无线协议来调制第二信号。

2. 发明授权

US06278333B1 Phase lock loop with dual state charge pump and method of operating the same 有权
标题翻译：具有双态电荷泵的锁相环及其操作方法
公开(公告)号：US06278333B1
公开(公告)日：2001-08-21
申请号：US09514802
申请日：2000-02-29
申请人： Quang C. Le , Ronald H. Deck , Richard B. Meador , David H. Minasi
发明人： Quang C. Le , Ronald H. Deck , Richard B. Meador , David H. Minasi
IPC分类号： H03L708
CPC分类号： H03L7/107 , H03L7/0893 , H03L7/0898 , H03L7/1976
摘要： A phase lock loop (100) includes a dual-state charge pump (120) having a first current source (220), a second current source (230) coupled in series to the first current source, a third current source (240), a fourth current source (250) coupled in series to the third current source, and control circuitry (210) coupled to the first, second, third, and fourth current sources. The charge pump can be programmed to be in an adapt mode with large up and down currents or in a normal mode with small up and down currents. The duration of the adapt mode can be programmed by a timer. The phase lock loop has a wide loop bandwidth and a faster lock time during the adapt mode and a narrow loop bandwidth and less phase noise during the normal mode.
摘要翻译：锁相环（100）包括具有第一电流源（220），与第一电流源串联耦合的第二电流源（230）的双态电荷泵（120），第三电流源（240）耦合到第三电流源的第四电流源（250）和耦合到第一，第二，第三和第四电流源的控制电路（210）。电荷泵可以编程为具有较大上下电流的适应模式，或者在正常模式下，具有较小的上下电流。适配模式的持续时间可以由定时器编程。在正常模式期间，锁相环具有较宽的环路带宽和适应模式下较快的锁定时间以及较窄的环路带宽和较小的相位噪声。

3. 发明授权

US06271707B1 Level shifter 失效
标题翻译：电平移位器
公开(公告)号：US06271707B1
公开(公告)日：2001-08-07
申请号：US09515005
申请日：2000-02-29
申请人： Quang C. Le , Charles H. Matsumoto
发明人： Quang C. Le , Charles H. Matsumoto
IPC分类号： H03L500
CPC分类号： H03K19/017518
摘要： A level shifter for use in an integrated circuit that translates a binary input signal having a low voltage level to a binary output signal having a different voltage level. The level shifter (10) includes an input stage (20) that receives the input signal and provides control signals to a low state voltage translation circuit (30) and a high state voltage translation circuit (40). The low state voltage translation circuit (30) controls the level shifter (10) when the input signal is low and provides a bias signal to a bipolar device (Q2) adapted to pull the external output signal low. The high state voltage translation circuit (40) controls the level shifter (10) when the input signal is high and includes a voltage reducing circuit (44) operating as a current mirror with a pull-up PMOS transistor (P13) to couple an internal high voltage power supply to the output node (Vout).
摘要翻译：一种用于集成电路的电平移位器，其将具有低电压电平的二进制输入信号转换为具有不同电压电平的二进制输出信号。电平移位器（10）包括输入级（20），其接收输入信号并向低态电压转换电路（30）和高状态电压转换电路（40）提供控制信号。当输入信号为低电平时，低态电压转换电路（30）控制电平移位器（10），并向适于将外部输出信号拉低的双极器件（Q2）提供偏置信号。当输入信号为高电平时，高状态电压转换电路（40）控制电平移位器（10），并包括用上拉PMOS晶体管（P13）作为电流镜工作的电压降低电路（44）输出节点（Vout）的高压电源。

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