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1. 发明授权

US4539552A Digital-to-analog converter 失效
标题翻译：数模转换器
公开(公告)号：US4539552A
公开(公告)日：1985-09-03
申请号：US416609
申请日：1982-09-10
申请人： Paul C. Davis , Raymond G. Jackson , Joseph J. Nahas , Dale H. Nelson , DeWitt G. Ong , Brian A. Wittman
发明人： Paul C. Davis , Raymond G. Jackson , Joseph J. Nahas , Dale H. Nelson , DeWitt G. Ong , Brian A. Wittman
IPC分类号： H04M1/50 , H03K13/02
CPC分类号： H04M1/505
摘要： A digital-to-analog signal converter (1000) provides an analog output signal by subtracting bit currents reflecting a digital input signal from a constant current source (1004, 1018-1022) at a current summer (1003), with the difference current being applied to a constant load. The subtracting of the current, rather than switching the current, avoids the modulation of an associated power source since the total current demand remains the same. In that low power operation is possible, the converter is particularly suited for use in an arrangement where only a low level of operating current is available from a power source.
摘要翻译：数字 - 模拟信号转换器（1000）通过在当前夏天（1003）减去反映来自恒定电流源（1004,1018-1022）的数字输入信号的位电流来提供模拟输出信号，差分电流为应用于恒定负载。电流的减去而不是切换电流避免了相关电源的调制，因为总电流需求保持不变。在这种低功率操作是可能的情况下，转换器特别适用于只能从电源获得低电平的工作电流的布置。

2. 发明授权

US4352958A Electronically-switched multifrequency generator with transducer control 失效
标题翻译：具有传感器控制的电子切换多频发生器
公开(公告)号：US4352958A
公开(公告)日：1982-10-05
申请号：US103403
申请日：1979-12-13
申请人： Paul C. Davis , Raymond G. Jackson , Joseph J. Nahas , Dale H. Nelson , DeWitt G. Ong , Brian A. Wittman
发明人： Paul C. Davis , Raymond G. Jackson , Joseph J. Nahas , Dale H. Nelson , DeWitt G. Ong , Brian A. Wittman
IPC分类号： H03K3/78 , H04M1/50
CPC分类号： H04M1/505
摘要： In a multifrequency generator providing tone signaling for a telephone, the common switching functions are performed by solid state switching circuitry (1200). Improved signal transfer between the telephone line and transmit and receive transducer of the telephone is provided by arranging the solid-state transmit and receive switches (1201, 1401) in a gain configuration to increase the level of the speech signal. The tone signals are digitally synthesized and use an integrated R-C oscillator (600) as a reference. Button down and button up debouncing of a contact closure signal from a single contact per button keypad is provided.
摘要翻译：在为电话提供音频信令的多频发生器中，公共切换功能由固态切换电路（1200）执行。通过将固态发送和接收开关（1201,1401）布置在增益配置中以提高语音信号的电平来提供电话线和电话的发送和接收换能器之间的改进的信号传送。音频信号是数字合成的，并使用集成的R-C振荡器（600）作为参考。提供按钮并按下按钮，从每个按钮小键盘的单个触点触发闭合信号的去抖动。

3. 发明授权

US07388442B2 Digitally controlled oscillator for reduced power over process variations 失效
标题翻译：数字控制振荡器，减少过程变化的功率
公开(公告)号：US07388442B2
公开(公告)日：2008-06-17
申请号：US11155824
申请日：2005-06-18
申请人： Dale H. Nelson
发明人： Dale H. Nelson
IPC分类号： H03B27/00
CPC分类号： H03K3/0315 , H03K3/012 , H03K5/133 , H03L7/0995
摘要： This disclosure relates to a cell-placeable variable-frequency digitally controlled oscillator (DCO) that consumes approximately the same current in a fast process corner as in the case of a slow process corner. By modulating the effective channel length of transistors in inverters, a fast process DCO may be slowed down to a desired frequency at nearly the same current consumption as that of a slow process DCO.
摘要翻译：本公开涉及在快速处理角落中消耗大致相同电流的电池可放置可变频率数字控制振荡器（DCO），如在慢速工艺拐角的情况下。通过调制反相器中的晶体管的有效沟道长度，快速处理DCO可以以与慢处理DCO几乎相同的电流消耗减慢到期望的频率。

4. 发明授权

US06831976B1 Telephone line-powered power supply for ancillary equipment and method of operation thereof 失效
标题翻译：用于辅助设备的电话线供电电源及其操作方法
公开(公告)号：US06831976B1
公开(公告)日：2004-12-14
申请号：US09212533
申请日：1998-12-16
申请人： Timothy N. Comerford , Dale H. Nelson , Xiqun Zhu
发明人： Timothy N. Comerford , Dale H. Nelson , Xiqun Zhu
IPC分类号： H04M1908
CPC分类号： H04M19/08
摘要： A telephone line-powered power supply, a method of operating the same and telephone line-powered ancillary equipment. In one embodiment, the power supply includes: (1) a transformer having a primary winding and a secondary winding and (2) an energy storage device (which may, but is not required to, be a capacitor) series-coupled to the primary winding, the primary winding and the energy storage device adapted to be coupled to, and provide a terminating resistance for, a telephone line. A node between the primary winding and the energy storage device provides DC power. Another embodiment employs a control switch to regulate an energy storage device, thereby dispensing with a need for the transformer.
摘要翻译：电话线供电电源，操作方法和电话线供电辅助设备。在一个实施例中，电源包括：（1）具有初级绕组和次级绕组的变压器和（2）能量存储装置（其可以但不要求为电容器）串联耦合到初级绕组绕组，初级绕组和能量存储装置，其适于耦合到电话线，并为电话线提供终端电阻。初级绕组和储能装置之间的节点提供直流电力。另一个实施例采用控制开关来调节能量存储装置，从而分配对变压器的需要。

5. 发明授权

US5311088A Transconductance cell with improved linearity 失效
标题翻译：线性度提高的跨导电池
公开(公告)号：US5311088A
公开(公告)日：1994-05-10
申请号：US918172
申请日：1992-07-23
申请人： Dale H. Nelson
发明人： Dale H. Nelson
IPC分类号： H03F1/32 , H03F3/45 , H03H11/04 , H03B5/12
CPC分类号： H03F3/45076 , H03F1/3211 , H03H11/0433
摘要： Analog filters may be conveniently implemented in MOS technology by the use of "transconductance cells". Each cell includes stages each having a pair of current paths, with each path comprising a current source and input transistor. The gain of each stage is set by a transistor connected across the current path, with the transconductance of this transistor being controlled by its gate voltage. In the inventive technique, a transconductance cell comprising two input stages utilizes inputs to each input stage that are in-phase rather than complementary, as in prior-art designs. The inputs to the second input stage are then each balanced (out of phase) with respect to the inputs to the first input stage. Higher linearity is obtained, with the common-mode signal being cancelled by the summation of currents supplied by the input stages to the common output stage. A biquadratic filter conveniently implements this technique, with other applications being possible.
摘要翻译：模拟滤波器可以通过使用“跨导电池”在MOS技术中方便地实现。每个单元包括各自具有一对电流路径的阶段，每个路径包括电流源和输入晶体管。每个级的增益由连接在电流路径上的晶体管设置，该晶体管的跨导由其栅极电压控制。在本发明的技术中，如现有技术设计中那样，包括两个输入级的跨导单元利用与每个输入级的输入相同而不是互补的。然后，第二输入级的输入相对于第一输入级的输入被平衡（异相）。通过由输入级提供给公共输出级的电流的总和来消除共模信号，从而获得更高的线性度。双向过滤器方便地实现这种技术，其他应用是可能的。

6. 发明授权

US5001439A Very low distortion amplifier 失效
标题翻译：超低失真放大器
公开(公告)号：US5001439A
公开(公告)日：1991-03-19
申请号：US368483
申请日：1989-06-19
申请人： Douglas D. Lopata , Dale H. Nelson , Thayamkulangara R. Viswanathan
发明人： Douglas D. Lopata , Dale H. Nelson , Thayamkulangara R. Viswanathan
IPC分类号： H03F1/32 , H03F1/48 , H03F3/45
CPC分类号： H03F1/3211 , H03F1/48 , H03F3/45071
摘要： An operational amplifier and method for making same, with predetermined common mode voltage gain, adapted to form an amplifier and a voltage regulator. The predetermined common mode voltage gain allows for substantially reduced differential mode gain and wider operating bandwidth with little distortion, compared to amplifiers and voltage regulators using operational amplifiers of the prior art. Further, examples of operational amplifiers, having the reduced differential mode gain and predetermined common mode gain, are given for implementation in CMOS and bipolar technologies.

7. 发明授权

US07496170B2 Digitally controlled oscillator having enhanced control resolution 有权
标题翻译：具有增强的控制分辨率的数字控制振荡器
公开(公告)号：US07496170B2
公开(公告)日：2009-02-24
申请号：US11439913
申请日：2006-05-24
申请人： Dale H. Nelson
发明人： Dale H. Nelson
IPC分类号： H03D3/24
CPC分类号： H03L7/089 , H03L7/0995 , H03L7/0997 , H03L7/18 , H03L2207/50
摘要： A signal generator circuit having enhanced control resolution includes a variable frequency oscillator having a first control input adapted to receive a first signal and at least a second control input adapted to receive a second signal. The second signal is afforded a weight which is substantially equal to a weight of a least significant bit of the first signal. The variable frequency oscillator is operative to generate an output signal having a frequency which varies as a function of the first and second signals. The signal generator circuit further includes a first counter, a first divider and a modulation circuit. The first counter is configurable for generating an output count based at least in part on a difference between a third signal presented to the signal generator circuit and a fourth signal indicative of the output signal, the output count including the first signal. The first divider has a selectable divide value associated therewith and is configurable for receiving the output signal and for generating the fourth signal based on the divide value. The modulation circuit is adapted to receive at least a portion of the output count and the fourth signal and to generate the second signal as a function of the output count and the fourth signal.
摘要翻译：具有增强的控制分辨率的信号发生器电路包括具有适于接收第一信号的第一控制输入和适于接收第二信号的至少第二控制输入的可变频率振荡器。提供第二信号的权重基本上等于第一信号的最低有效位的权重。可变频率振荡器用于产生具有作为第一和第二信号的函数而变化的频率的输出信号。信号发生器电路还包括第一计数器，第一除法器和调制电路。第一计数器可配置用于至少部分地基于呈现给信号发生器电路的第三信号与指示输出信号的第四信号（包括第一信号）的输出计数产生输出计数。第一分频器具有与其相关联的可选分频值，并且可配置为用于接收输出信号并且用于基于分频值产生第四信号。调制电路适于接收输出计数和第四信号的至少一部分，并且产生作为输出计数和第四信号的函数的第二信号。

8. 发明授权

US06654469B1 Methods and devices for reducing sampling noise in analog signals using linear interpolation 失效
标题翻译：使用线性插值减少模拟信号采样噪声的方法和装置
公开(公告)号：US06654469B1
公开(公告)日：2003-11-25
申请号：US09340439
申请日：1999-06-28
申请人： Dale H. Nelson , Tseng-Nan Tsai
发明人： Dale H. Nelson , Tseng-Nan Tsai
IPC分类号： H04B1500
CPC分类号： H03M1/0863 , H03M1/66
摘要： Sampling noise in an analog signal output from a codec, such as a speech codec, is reduced using linear interpolation. The output of a codec is input into two sample and hold circuits. The circuits generate two output signals (i.e. voltages) for each input signal. One of the output signals represents an interpolated signal located midway between an historical output signal and input signal. The generation of interpolated output signals reduces sampling noise.
摘要翻译：使用线性插值减少了编解码器输出的模拟信号（如语音编解码器）中的采样噪声。编解码器的输出被输入到两个采样和保持电路中。电路为每个输入信号产生两个输出信号（即电压）。输出信号之一表示位于历史输出信号和输入信号之间的内插信号。内插输出信号的产生降低了采样噪声。

9. 发明授权

US06552618B2 VCO gain self-calibration for low voltage phase lock-loop applications 失效
公开(公告)号：US06552618B2
公开(公告)日：2003-04-22
申请号：US09735699
申请日：2000-12-13
申请人： Dale H. Nelson , Lizhong Sun
发明人： Dale H. Nelson , Lizhong Sun
IPC分类号： H03L7087
CPC分类号： H03L7/10 , H03L7/087 , H03L7/0891 , H03L7/099 , H03L7/18
摘要： A phase-locked loop (PLL) circuit having a voltage-controlled oscillator (VCO) is automatically calibrated for VCO center frequency and VCO gain during power up or responsive to a calibration signal. The VCO has several input voltage versus output frequency operating curves. During a calibration phase, proper VCO center frequency is selected by selecting one of the operating curves. VCO gain is then determined using the selected VCO operating curve. If the value of VCO gain is not within predetermined limits, VCO gain is adjusted accordingly, and the process of selecting a VCO operating curve and determining VCO gain is repeated.

10. 发明授权

US6163183A Multifunction reset for mixed-signal integrated circuits 有权
标题翻译：混合信号集成电路的多功能复位
公开(公告)号：US6163183A
公开(公告)日：2000-12-19
申请号：US356043
申请日：1999-07-16
申请人： Kouros Azimi , Zhigang Ma , Dale H. Nelson , Brian J. Petryna , Oceager P. Yee
发明人： Kouros Azimi , Zhigang Ma , Dale H. Nelson , Brian J. Petryna , Oceager P. Yee
IPC分类号： G01R31/3167 , H03K17/22 , H03L7/00
CPC分类号： G01R31/3167 , H03K17/223
摘要： A multifunction reset circuit including low power bandgap, a comparator, and an open drain buffer circuit--with the inclusion of four external components (three resistors and one capacitor) to provide undervoltage monitoring, power failure indicating, manual resetting and other reset control conditions to a single integrated circuit terminal, together with hysteresis tolerance.
摘要翻译：包括低功率带隙，比较器和开漏缓冲电路的多功能复位电路 - 包括四个外部组件（三个电阻器和一个电容器），以提供欠压监控，停电指示，手动复位和其他复位控制条件单个集成电路端子，以及滞后公差。

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