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1. 发明授权

US4518877A Precision absolute value amplifier for a precision voltmeter 失效
标题翻译：精密电压表精密绝对值放大器
公开(公告)号：US4518877A
公开(公告)日：1985-05-21
申请号：US435157
申请日：1982-10-19
申请人： William E. Hearn , Donald J. Rondeau
发明人： William E. Hearn , Donald J. Rondeau
IPC分类号： G01R19/00 , G01R19/252 , G06G7/25 , H03K5/22 , G06G7/12
CPC分类号： G01R19/0084 , G01R19/252 , G06G7/25
摘要： Bipolar inputs are afforded by the plus inputs of first and second differential input amplifiers. A first gain determining resister is connected between the minus inputs of the differential amplifiers. First and second diodes are connected between the respective minus inputs and the respective outputs of the differential amplifiers. First and second FETs have their gates connected to the outputs of the amplifiers, while their respective source and drain circuits are connected between the respective minus inputs and an output lead extending to a load resister. The output current through the load resister is proportional to the absolute value of the input voltage difference between the bipolar input terminals. A third differential amplifier has its plus input terminal connected to the load resister. A second gain determining resister is connected between the minus input of the third differential amplifier and a voltage source. A third FET has its gate connected to the output of the third amplifier. The source and drain circuit of the third transistor is connected between the minus input of the third amplifier and a voltage-frequency converter, constituting an output device. A polarity detector is also provided, comprising a pair of transistors having their inputs connected to the outputs of the first and second differential amplifiers. The outputs of the polarity detector are connected to gates which switch the output of the voltage-frequency converter between up and down counting outputs.
摘要翻译：双极输入由第一和第二差分输入放大器的正输入提供。第一增益确定寄存器连接在差分放大器的负输入端之间。第一和第二二极管连接在差分放大器的各个负输入端和相应的输出端之间。第一和第二FET的栅极连接到放大器的输出，而它们各自的源极和漏极电路连接在相应的负输入端和延伸到负载电阻器的输出引线之间。通过负载电阻的输出电流与双极性输入端子之间的输入电压差的绝对值成比例。第三个差分放大器的加号输入端连接到负载电阻。第二增益确定寄存器连接在第三差分放大器的负输入端和电压源之间。第三个FET的栅极连接到第三个放大器的输出。第三晶体管的源极和漏极电路连接在构成输出装置的第三放大器的负输入端和电压 - 频率转换器之间。还提供了极性检测器，包括一对晶体管，其输入连接到第一和第二差分放大器的输出。极性检测器的输出端连接到在上下计数输出之间切换电压 - 频率转换器的输出的门。

2. 发明授权

US3627912A Visual display of complex color television sound wave signals 失效
标题翻译：复杂彩色电视声波信号的视觉显示
公开(公告)号：US3627912A
公开(公告)日：1971-12-14
申请号：US3627912D
申请日：1969-04-23
申请人： WILLIAM E HEARN , CHARLES W KIESER
发明人： HEARN WILLIAM E
IPC分类号： H04N11/00 , H04N9/02
CPC分类号： H04N11/00
摘要： This disclosure involves apparatus and modifying circuits for use in conjunction with a conventional color cathode-ray tube to provide fanciful wide-band vector representations of the video signals by a pair of audio channels such, for example, as would be produced with a stereophonic recorded-signal source. The stereophonic signal source may be generated through microphones, phonograph and magnetic tape recordings, or from stereophonic broadcasts and is amplified and processed by wide-band linear circuitry whose effect is substantially independent of frequency and displayed in vector form on a color cathode-ray tube utilizing magnetic deflection. The effect of the apparatus is to produce highly detailed visual patterns of great regularity and beauty of form and color, revealing fine details inherent in the stereophonic representation of the complex, nonrecurrent wave forms produced by music or voice. No filters or frequency sensitive elements are used except as required to enhance the signal-to-noise ratio of the program material in which no timing signal, sweep signal, or raster representation is employed.

3. 发明授权

US3968467A Touch controlled voltage-divider device 失效
标题翻译：触控式分压器
公开(公告)号：US3968467A
公开(公告)日：1976-07-06
申请号：US519825
申请日：1974-11-01
申请人： Stephen H. Lampen , William E. Hearn
发明人： Stephen H. Lampen , William E. Hearn
IPC分类号： G01R1/28 , H01C10/00 , H03G3/02 , H01C10/30
CPC分类号： H03G3/02 , G01R1/28 , H01C10/00 , Y10S323/904
摘要： A voltage divider device capable of providing any voltage in a preselected range of voltages, which voltage may be set by a touch of the finger is disclosed. The device includes a control element without frictional contacts and a voltage storage circuit controlled by the control element. A circuit including the device is described and embodiments of the device providing a visual indication of the setting of the device are disclosed.
摘要翻译：公开了一种分压器装置，其能够提供预选的电压范围内的任何电压，该电压可以通过手指的触摸来设定。该装置包括没有摩擦触点的控制元件和由控制元件控制的电压存储电路。描述了包括该装置的电路，并且公开了提供设备的设置的视觉指示的装置的实施例。

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