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    • 5. 发明授权
    • High-linearity complementary amplifier
    • 高线性互补放大器
    • US07936217B2
    • 2011-05-03
    • US11947570
    • 2007-11-29
    • Junxiong DengGurkanwal Singh SahotaSolti Peng
    • Junxiong DengGurkanwal Singh SahotaSolti Peng
    • H03F3/18
    • H03F1/3205H03F1/0261H03F1/086H03F1/3211H03F1/56H03F3/19H03F3/3022H03F3/45179H03F2200/18H03F2200/294H03F2200/354H03F2200/451
    • A complementary amplifier includes an NMOS transistor coupled to a PMOS transistor in a stacked configuration. The NMOS transistor and the PMOS transistor receive and amplify an input signal. The NMOS and PMOS transistors operate as a linear complementary amplifier and provide an output signal. The NMOS and PMOS transistors may have separate bias voltages, which may be selected to overlap the low-to-high and high-to-low transitions of the transconductances of these transistors. The width and length dimensions of the NMOS and PMOS transistors may be selected to match the change in input capacitance and the change in transconductance of the NMOS transistor in moderate inversion region with the change in input capacitance and the change in transconductance of the PMOS transistor in moderate inversion region. The complementary amplifier may have an approximately constant total input capacitance and an approximately constant total transconductance over a range of voltages.
    • 互补放大器包括以堆叠配置耦合到PMOS晶体管的NMOS晶体管。 NMOS晶体管和PMOS晶体管接收和放大输入信号。 NMOS和PMOS晶体管作为线性互补放大器工作并提供输出信号。 NMOS和PMOS晶体管可以具有单独的偏置电压,其可以被选择为与这些晶体管的跨导的低到高和高到低的跃迁重叠。 可以选择NMOS和PMOS晶体管的宽度和长度尺寸以匹配输入电容的变化和中等反转区中NMOS晶体管的跨导变化,随着输入电容的变化和PMOS晶体管的跨导变化 中等反转区。 互补放大器可以具有近似恒定的总输入电容和在一定范围的电压上的近似恒定的总跨导。
    • 6. 发明申请
    • DIGITAL PHASE-LOCKED LOOP WITH GATED TIME-TO-DIGITAL CONVERTER
    • 数字锁相环与定位的时间到数字转换器
    • US20090175399A1
    • 2009-07-09
    • US11969359
    • 2008-01-04
    • Bo SunGurkanwal Singh SahotaZixiang Yang
    • Bo SunGurkanwal Singh SahotaZixiang Yang
    • H03D3/24
    • H03L7/0802H03L7/087
    • A digital PLL (DPLL) includes a time-to-digital converter (TDC) and a control unit. The TDC is periodically enabled for a short duration to quantize phase information and disabled for the remaining time to reduce power consumption. The TDC receives a first clock signal and a first reference signal and provides a TDC output indicative of the phase difference between the first clock signal and the first reference signal. The control unit generates an enable signal based on a main reference signal and enables and disables the TDC with the enable signal. In one design, the control unit delays the main reference signal to obtain the first reference signal and a second reference signal, generates the enable signal based on the main reference signal and the second reference signal, and gates a main clock signal with the enable signal to obtain the first clock signal for the TDC.
    • 数字PLL(DPLL)包括时间 - 数字转换器(TDC)和控制单元。 定期启用TDC以持续短时间量化相位信息,并在剩余时间内禁用TDC以降低功耗。 TDC接收第一时钟信号和第一参考信号,并提供指示第一时钟信号和第一参考信号之间的相位差的TDC输出。 控制单元基于主参考信号生成使能信号,并使能和禁止具有使能信号的TDC。 在一种设计中,控制单元延迟主参考信号以获得第一参考信号和第二参考信号,基于主参考信号和第二参考信号产生使能信号,并且将主时钟信号与使能信号 以获得TDC的第一个时钟信号。
    • 7. 发明申请
    • HIGH-LINEARITY COMPLEMENTARY AMPLIFIER
    • 高线性互补放大器
    • US20090140812A1
    • 2009-06-04
    • US11947570
    • 2007-11-29
    • Junxiong DengGurkanwal Singh SahotaSolti Peng
    • Junxiong DengGurkanwal Singh SahotaSolti Peng
    • H03F3/16
    • H03F1/3205H03F1/0261H03F1/086H03F1/3211H03F1/56H03F3/19H03F3/3022H03F3/45179H03F2200/18H03F2200/294H03F2200/354H03F2200/451
    • A complementary amplifier includes an NMOS transistor coupled to a PMOS transistor in a stacked configuration. The NMOS transistor and the PMOS transistor receive and amplify an input signal. The NMOS and PMOS transistors operate as a linear complementary amplifier and provide an output signal. The NMOS and PMOS transistors may have separate bias voltages, which may be selected to overlap the low-to-high and high-to-low transitions of the transconductances of these transistors. The width and length dimensions of the NMOS and PMOS transistors may be selected to match the change in input capacitance and the change in transconductance of the NMOS transistor in moderate inversion region with the change in input capacitance and the change in transconductance of the PMOS transistor in moderate inversion region. The complementary amplifier may have an approximately constant total input capacitance and an approximately constant total transconductance over a range of voltages.
    • 互补放大器包括以堆叠配置耦合到PMOS晶体管的NMOS晶体管。 NMOS晶体管和PMOS晶体管接收和放大输入信号。 NMOS和PMOS晶体管作为线性互补放大器工作并提供输出信号。 NMOS和PMOS晶体管可以具有单独的偏置电压,其可以被选择为与这些晶体管的跨导的低到高和高到低的跃迁重叠。 可以选择NMOS和PMOS晶体管的宽度和长度尺寸以匹配输入电容的变化和中等反转区中NMOS晶体管的跨导变化,随着输入电容的变化和PMOS晶体管的跨导变化 中等反转区。 互补放大器可以具有近似恒定的总输入电容和在一定范围的电压上的近似恒定的总跨导。
    • 8. 发明申请
    • DYNAMIC BIASING OF A VCO IN A PHASE-LOCKED LOOP
    • 在相位锁定环路中的VCO的动态偏移
    • US20090111409A1
    • 2009-04-30
    • US11924318
    • 2007-10-25
    • Bo SunGurkanwal Singh SahotaYue Wu
    • Bo SunGurkanwal Singh SahotaYue Wu
    • H04B1/18
    • H03L7/197H03J7/065H03L1/00H03L7/0802H03L7/0898H03L7/093H03L7/107H03L2207/06
    • A local oscillator includes a phase-locked loop. The phase-locked loop includes voltage controlled oscillator (VCO) and a novel VCO control circuit. The VCO control circuit may be programmable and configurable. In one example, an instruction is received onto the VCO control circuit to change the power state of the VCO. The instruction is issued by other circuitry in response to a detected change in RF channel conditions (for example, a change in a signal-to-noise determination) in a cellular telephone. In response, the VCO control circuit outputs control signals that gradually widen the loop bandwidth of the PLL, then gradually change the VCO bias current to change the VCO power state, and then narrow the loop bandwidth of the PLL back to its original bandwidth. The entire process of widening the PLL bandwidth, changing the VCO power state, and narrowing the PLL bandwidth occurs while the PLL remains locked.
    • 本地振荡器包括锁相环。 锁相环包括压控振荡器(VCO)和新型VCO控制电路。 VCO控制电路可以是可编程的和可配置的。 在一个示例中,在VCO控制电路上接收指令以改变VCO的功率状态。 响应于在蜂窝电话中的RF信道条件(例如,信噪比确定的变化)的检测到的改变,由其他电路发出指令。 作为响应,VCO控制电路输出逐渐拓宽PLL环路带宽的控制信号,然后逐渐改变VCO偏置电流,改变VCO功率状态,然后将PLL的环路带宽缩小回原来的带宽。 当PLL保持锁定时,会发生整个PLL带宽扩大,改变VCO功率状态和缩小PLL带宽的过程。