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    • 1. 发明申请
    • Circuit generating constant narrow-pulse-width bipolarity monocycles
    • 电路产生恒定窄脉宽双极性单环
    • US20050151572A1
    • 2005-07-14
    • US11063889
    • 2005-02-24
    • Agustin OchoaPhuong HuynhJohn McCorkle
    • Agustin OchoaPhuong HuynhJohn McCorkle
    • H03K5/05H03K5/151H03K7/04H02M7/217
    • H04B1/7174H03K5/05H03K5/151H03K7/04
    • A mono-cycle generating circuit includes a multiplexer, a pulse generating circuit, and a buffer circuit. The multiplexer receives data of a logical 1 or a logical 0, determines whether to generate a positive mono-cycle or a negative mono-cycle, based upon the data, and outputs clock signals varying in time based upon the data. The pulse generating circuit is coupled to the multiplexer, receives the clock signals and generates a first series of pulses including an up-pulse preceding a down-pulse, or a second series of pulses including a down-pulse preceding an up-pulse, in response to the clock signals received by the multiplexer. The buffer circuit is coupled to the pulse generating circuit and includes a switch circuit and a common mode buffer. The switch circuit generates the positive mono-cycle or the negative mono-cycle, based upon whether the first series of pulses is received from the pulse generating circuit or the second series of pulses is received from the pulse generating circuit. The common mode buffer circuit is coupled to the switching circuit and reduces noise generated by the switch circuit.
    • 单周期发生电路包括多路复用器,脉冲发生电路和缓冲电路。 多路复用器接收逻辑1或逻辑0的数据,基于数据确定是否产生正单周期或负单周期,并且基于该数据输出时间变化的时钟信号。 脉冲发生电路耦合到多路复用器,接收时钟信号,并产生包括在下降脉冲之前的上升脉冲或包括上升脉冲之前的下降脉冲的第二脉冲序列的第一串脉冲, 响应于多路复用器接收的时钟信号。 缓冲电路耦合到脉冲发生电路,并包括开关电路和共模缓冲器。 开关电路基于从脉冲发生电路接收到第一串脉冲还是从脉冲发生电路接收到第二脉冲串,产生正单周期或负单周期。 共模缓冲电路耦合到开关电路并降低由开关电路产生的噪声。
    • 4. 发明申请
    • Method and device for generating high frequency waveforms
    • 用于产生高频波形的方法和装置
    • US20070047627A1
    • 2007-03-01
    • US11215305
    • 2005-08-31
    • John McCorklePhuong Huynh
    • John McCorklePhuong Huynh
    • H04B1/00
    • H04B1/71635H04B1/7172
    • An ultra wideband direct sequence code division multiple access (UWB DS-CDMA) (101) transmitter is provided. It includes a first multiplier (125) receiving two input signals, where the input signals are selected from a multi-level code signal (117), a transmit data signal (123), and a radio frequency (RF) center frequency signal (121), and responsive to the two input signals, generating a combined signal (127). Further included is a network (119) receiving a code-clock signal (113) aligned with the multi-level signal (117), multiplying the frequency of the code-clock signal (113) by a factor, and responsive thereto, producing the RF center frequency signal (121). Also provided is a second multiplier (129) receiving the combined signal (127) and the other of the input signals (117, 123, 121), and responsive thereto, generating an output signal (131).
    • 提供超宽带直接序列码分多址(UWB DS-CDMA)(101)发射机。 它包括接收两个输入信号的第一乘法器(125),其中从多电平码信号(117),发射数据信号(123)和射频(RF)中心频率信号(121)中选择输入信号 ),并且响应于所述两个输入信号,产生组合信号(127)。 进一步包括接收与多电平信号(117)对准的码时钟信号(113)的网络(119),将码时钟信号(113)的频率乘以因子,并响应于此产生 RF中心频率信号(121)。 还提供了接收组合信号(127)和另一个输入信号(117,123,121)的第二乘法器(129),并响应于此产生输出信号(131)。
    • 6. 发明申请
    • Wideband variable gain amplifier in an ultra wideband receiver
    • 宽带可变增益放大器在超宽带接收机
    • US20070049234A1
    • 2007-03-01
    • US11214061
    • 2005-08-30
    • John McCorklePhuong Huynh
    • John McCorklePhuong Huynh
    • H04B1/26
    • H03G3/3078H03G3/3052H04B1/71637
    • A method (700, 1100) and apparatus (300) are provided in a receiver for applying a variable gain to a received signal including a transmitted codeword in accordance with an Ultra Wideband (UWB) protocol. A first signal is generated and input to a selectable gain stage including a series of selectable 0 dB and 9 dB gain elements (302-305). The first signal includes the received signal mixed with a local oscillator signal modified according to a reference codeword. A gain value is selected from the selectable gain stage to amplify the first signal and form a second signal. An output signal is generated by combining the second signal and the modified local oscillator signal.
    • 在接收器中提供方法(700,1100)和装置(300),用于根据超宽带(UWB)协议向包括发送码字的接收信号施加可变增益。 产生第一信号并将其输入到包括一系列可选择的0dB和9dB增益元件(302-305)的可选增益级。 第一信号包括与根据参考码字修改的本地振荡器信号混合的接收信号。 从可选择的增益级中选择增益值以放大第一信号并形成第二信号。 通过组合第二信号和修改的本地振荡器信号来产生输出信号。
    • 7. 发明授权
    • Chemiluminescent detection of explosives, narcotics, and other chemical substances
    • 爆炸物,麻醉剂和其他化学物质的化学发光检测
    • US06984524B2
    • 2006-01-10
    • US10241407
    • 2002-09-12
    • Dao Hinh NguyenStewart BerryJan Prot GeblewiczGuy CouturePhuong Huynh
    • Dao Hinh NguyenStewart BerryJan Prot GeblewiczGuy CouturePhuong Huynh
    • G01N21/76
    • G01N21/76G01N2001/022Y10T436/170769Y10T436/173076Y10T436/178459
    • A compact scanning apparatus has an infrared laser adapted to emit light. The light is delivered as a beam by an optical system to illuminate an interrogation area on the surface of an object being scanned. Such illumination has sufficient intensity and duration to cause selective desorption of molecules of the contraband substance, which are present on the surface, without substantially damaging the surface. A collection system collects at least a portion of the desorbed molecules. At least a portion of the collected molecules is thermally decomposed to form NO2 and transferred to a reaction cell containing an aqueous, alkaline, luminol-containing solution. The NO2 reacts with the luminol to produce light by chemiluminescence. A light detector registers the presence of this light as indicative of the detection of the contraband substance, and activates a signaling device to provide an audible or visible alarm. The apparatus rapidly detects the presence of a wide variety of contraband substances in an accurate, reliable manner. It provides for automated screening, with the result that vagaries of human performance are virtually eliminated. False alarms are reduced and detection efficacy is increased. A traceable residue of the detected contraband is left on the article for use in forensic analysis.
    • 小型扫描装置具有适于发光的红外激光器。 光通过光学系统作为光束传送,以照亮被扫描物体的表面上的询问区域。 这种照明具有足够的强度和持续时间,以使得表面上存在的违禁物质的分子的选择性解吸,而不会基本上损害表面。 收集系统收集至少一部分解吸的分子。 所收集的分子的至少一部分被热分解以形成NO 2,并转移到含有含水,碱性,含鲁米诺溶液的反应池中。 NO 2 2与发光体反应以通过化学发光产生光。 光检测器将该光的存在注册为指示违禁物质的检测,并激活信号装置以提供可听或可见的警报。 该装置以准确,可靠的方式快速检测各种违禁物质的存在。 它提供了自动化筛选,结果是几乎消除了人类行为的变幻莫测。 虚假警报降低,检测效果提高。 检测到的违禁品的可追溯残留物留在用于法医分析的物品上。
    • 9. 发明申请
    • Power control feedback loop for adjusting a magnitude of an output signal
    • 功率控制反馈回路,用于调整输出信号的幅度
    • US20070206523A1
    • 2007-09-06
    • US11238986
    • 2005-09-30
    • Phuong HuynhNitin Sharma
    • Phuong HuynhNitin Sharma
    • H04B7/185
    • H03G3/3042H03G3/001
    • A circuit for adjusting a magnitude of a transmit signal includes a transmitter (105), providing a transmit signal (107). It also includes a transmitter amplifier (109), receiving the transmit signal (107) and a power control adjustment signal (121), and responsive thereto, providing an amplified transmit signal (111). The circuit also includes a detector (1 23), for detecting an amplitude of the amplified transmit signal (111). Also included is an error component (137) for determining the difference between the amplitude and a reference level (129). Further provided is a digital signal generator (155), receiving the difference (145), and responsive thereto, generating (157) a reference signal (125) and the power control adjustment signal (117, 121), where the reference level (129) is responsive to the reference signal (125).
    • 用于调整发射信号幅度的电路包括发射机(105),提供发射信号(107)。 它还包括发射放大器(109),接收发射信号(107)和功率控制调整信号(121),并响应于此,提供放大的发射信号(111)。 电路还包括用于检测放大的发射信号(111)的振幅的检测器(123)。 还包括用于确定幅度和参考水平(129)之间的差的误差分量(137)。 还提供了一种数字信号发生器(155),其接收差值(145),并响应于此产生(157)参考信号(125)和功率控制调节信号(117,121),其中参考电平(129 )响应于参考信号(125)。
    • 10. 发明授权
    • Bandpass-sampling delta-sigma demodulator
    • 带通采样δ-sigma解调器
    • US08717212B2
    • 2014-05-06
    • US13623350
    • 2012-09-20
    • Phuong Huynh
    • Phuong Huynh
    • H03M3/00
    • H03M3/02H03M3/40H03M3/41
    • An improved quadrature bandpass-sampling delta-sigma analog-to-digital demodulator is provided, which includes a loop filter, an A/D responsive to the loop filter, and a first feedback D/A responsive to the A/D up-converted in frequency by a first multiplier and a clock. A first summing circuit is responsive to the first D/A and an RF input for providing an input to the loop filter. A plurality of feedback D/As is responsive to the A/D up-converted in different frequencies by a plurality of multipliers and a plurality of clocks for providing feedback inputs to the loop filter. The loop filter comprises a plurality of resonators arranged in cascade configuration, a plurality of analog mixers to provide frequency shifting of the error signals propagating through the resonators, and a plurality of summing circuits responsive to the feedback D/As.
    • 提供了改进的正交带通采样Δ-Σ模数转换器,其包括环路滤波器,响应于环路滤波器的A / D和响应于A / D上变频的第一反馈D / A 频率乘第一乘法器和时钟。 第一求和电路响应于第一D / A和RF输入,用于向环路滤波器提供输入。 多个反馈D / AA响应于通过多个乘法器在不同频率中上变频的A / D和用于向环路滤波器提供反馈输入的多个时钟。 环路滤波器包括以级联配置布置的多个谐振器,多个模拟混频器,用于提供通过谐振器传播的误差信号的频移,以及响应于反馈D / A的多个求和电路。