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1. 发明授权

US4225794A Voltage controlled amplifier 失效
标题翻译：电压控制放大器
公开(公告)号：US4225794A
公开(公告)日：1980-09-30
申请号：US945432
申请日：1978-09-25
申请人： Paul C. Buff
发明人： Paul C. Buff
IPC分类号： H03G1/00 , H03G3/00 , G06G7/12
CPC分类号： H03G1/00 , H03G3/00
摘要： A voltage controlled amplifier or multiplier circuit including a dual polarity rectifier for dividing the AC input signal into first and second unipolar signals, the first unipolar signal being the positive excursion of the AC input signal and the second unipolar signal being the inverted negative portion of the AC signal. Each unipolar signal is processed through a separate, conventional, unipolar log-antilog amplifier circuit, to each of which is applied a control voltage. The resultant unipolar signals are then subtracted in a differential amplifier to reconstitute the waveform of the original AC input signal, thereby producing the gain-controlled output signal.
摘要翻译：一种电压控制放大器或乘法器电路，包括用于将AC输入信号分成第一和第二单极信号的双极性整流器，第一单极信号是AC输入信号的正偏移，而第二单极信号是第二单极性信号，交流信号。每个单极性信号通过单独的常规单极对数 - 反对数放大器电路进行处理，其中每一个施加一个控制电压。然后在差分放大器中减去所得到的单极信号，以重构原始AC输入信号的波形，从而产生增益控制的输出信号。

2. 发明授权

US06412545B1 Carrying case for protecting heat sensitive materials 有权
标题翻译：手提箱保护感热材料
公开(公告)号：US06412545B1
公开(公告)日：2002-07-02
申请号：US09931363
申请日：2001-08-16
申请人： Paul C. Buff , Deborah J. Buff
发明人： Paul C. Buff , Deborah J. Buff
IPC分类号： F28D1900
CPC分类号： F28D20/02 , A45C11/008 , A45C13/00 , A45D2200/152 , Y02E60/145
摘要： A carrying case for protecting heat sensitive materials includes a first portion, a second portion, and a closure device. The closure device seals the first portion to the second portion. Each portion includes a retainer which contains a phase change material. The retainer is covered on an outside with an insulation layer. The insulation layer and retainer are preferably covered with a fabric layer. A second embodiment of a carrying case for protecting heat sensitive materials includes a cover, a container, and a closure device. The walls of the container and cover preferably include a retainer which contains phase change material, an insulation layer, an outer fabric layer, and an inner fabric layer. A third embodiment of a carrying case for protecting heat sensitive materials includes a pouch which is sealable with a closure device. The wall of the pouch preferably includes a fabric outer layer, a flexible foam outer layer, a phase change layer, a flexible foam inner layer, and a fabric inner layer. The closure device for all embodiments may be a zipper; a hook and loop fastener; a latch or any other suitable closure device.
摘要翻译：用于保护热敏材料的手提箱包括第一部分，第二部分和封闭装置。封闭装置将第一部分密封到第二部分。每个部分包括包含相变材料的保持器。保持器在外部覆盖有绝缘层。绝缘层和保持器优选被织物层覆盖。用于保护热敏材料的便携箱的第二实施例包括盖，容器和封闭装置。容器和盖的壁优选地包括容纳相变材料的保持器，绝缘层，外部织物层和内部织物层。用于保护感热材料的携带箱的第三实施例包括可与封闭装置密封的袋。袋的壁优选包括织物外层，柔性泡沫外层，相变层，柔性泡沫内层和织物内层。所有实施例的闭合装置可以是拉链; 钩环紧固件; 闩锁或任何其它合适的闭合装置。

3. 发明授权

US4341962A Electronic gain control device 失效
标题翻译：电子增益控制装置
公开(公告)号：US4341962A
公开(公告)日：1982-07-27
申请号：US156059
申请日：1980-06-03
申请人： Paul C. Buff
发明人： Paul C. Buff
IPC分类号： G06G7/24 , H03G1/00 , G06G7/12
CPC分类号： G06G7/24 , H03G1/0005
摘要： An electronic gain control device including a first bipolar circuit having log transfer functional elements, preferably in the form of a pair of parallel first transistors of different polarities, and a second bipolar circuit including antilog transfer function elements, preferably a pair of second transistors connected in parallel and of opposite polarity. A gain control signal is summed with the log output signal of the first bipolar circuit to produce a second output signal antilogarithmically related to the first output signal and the gain control signal.The log and antilog transfer functional elements receive a bias signal of sufficient magnitude relative to the input signal that the entire circuit is in continuous electrical conduction in order to operate in a class A domain.Preferably a diode, such as a diode connected transistor, is connected in series with each emitter lead in each of the transistors incorporated in the first bipolar and second bipolar circuits to provide class A operation with a minimum of distortion and noise.
摘要翻译：一种电子增益控制装置，包括具有对数传递功能元件的第一双极电路，优选为具有不同极性的一对平行的第一晶体管，第二双极电路包括反逻辑传递函数元件，优选地连接在一对第二晶体管平行且极性相反。增益控制信号与第一双极电路的对数输出信号相加，以产生与第一输出信号和增益控制信号反对数相关的第二输出信号。对数和反对数传递功能元件相对于输入信号接收足够大的偏置信号，整个电路处于连续导电状态，以便在A类域中工作。优选地，诸如二极管连接晶体管的二极管与并入第一双极和第二双极电路中的每个晶体管中的每个发射极引线串联连接，以提供具有最小失真和噪声的A类操作。

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