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1. 发明授权

US4445053A Square law charger 失效
标题翻译：平方法充电器
公开(公告)号：US4445053A
公开(公告)日：1984-04-24
申请号：US807234
申请日：1977-06-16
申请人： C. Rene Jaeger , Joseph B. Seale
发明人： C. Rene Jaeger , Joseph B. Seale
IPC分类号： G06G7/20 , G06G7/12
CPC分类号： G06G7/20
摘要： A device is described for modifying the charging behavior of a charge storage device, such as a capacitor, so that the device charges substantially in accordance with a square law function responsively to a linear charging input current. The device has particular utility in a signal-conditioning system of the type including an averaging detector, a gain stage and a charge storage device coupled between the output of said detector and the input of said gain stage so that the input to said gain stage behaves in a similar manner to the output of an RMS detector.
摘要翻译：描述了用于修改诸如电容器的电荷存储装置的充电行为的装置，使得装置基本上按照线性充电输入电流的平方律函数进行充电。该装置在这种类型的信号调节系统中具有特别的用途，该信号调节系统包括耦合在所述检测器的输出和所述增益级的输入之间的平均检测器，增益级和电荷存储装置，使得到所述增益级的输入行为以与RMS检测器的输出相似的方式。

2. 发明授权

US4425551A Differential amplifier stage having bias compensating means 失效
标题翻译：差分放大器级具有偏置补偿装置
公开(公告)号：US4425551A
公开(公告)日：1984-01-10
申请号：US247649
申请日：1981-03-26
申请人： David E. Blackmer , David R. Welland
发明人： David E. Blackmer , David R. Welland
IPC分类号： H03F3/45
CPC分类号： H03F3/45479
摘要： An improved amplifier of the type comprising bipolar transistor means coupled between the input terminal of the amplifier and a differential pair of transistors. Compensation means is provided for generating a compensating signal through the bipolar transistor means such that the bipolar transistor means and compensation means reduce the amount of bias current drawn from the input signal to the amplifier. Other aspects of the present invention include the provision of reducing DC offset voltages between each side of the differential amplifier due to the operation of the device with its input terminals at different voltage levels, and the provision of a zero in the transfer characteristics of the amplifier to mitigate the effects of poles provided in the transfer characteristics.
摘要翻译：一种改进的放大器，其类型包括耦合在放大器的输入端和差分对晶体管之间的双极晶体管装置。提供补偿装置用于通过双极晶体管装置产生补偿信号，使得双极晶体管装置和补偿装置减少从输入信号汲取到放大器的偏置电流量。本发明的其它方面包括由于器件的操作使其输入端子处于不同的电压电平而在差分放大器的每一侧之间提供减小的DC偏移电压，并且在放大器的传输特性中提供零值以减轻传递特性中提供的极点的影响。

3. 发明授权

US4403199A Gain control systems 失效
标题翻译：增益控制系统
公开(公告)号：US4403199A
公开(公告)日：1983-09-06
申请号：US247829
申请日：1981-03-26
申请人： David E. Blackmer
发明人： David E. Blackmer
IPC分类号： H03G3/12 , H03G1/00 , H03G1/04 , H03G7/00 , H03G3/10 , G06G7/12
CPC分类号： H03G1/04 , H03G1/0005
摘要： An improved gain control circuit of the "eight transistor gain cell" type is disclosed. The improvements comprise (1) means for operating the circuit as a Class AB amplifier and (2) means for reducing the distortion component in the output signal due to the inherent parasitic base and emitter resistances of the transistors of the gain cell of the gain control circuit.
摘要翻译：公开了一种改进的“八晶体管增益单元”型增益控制电路。改进包括（1）用于将电路作为AB类放大器操作的装置，以及（2）由于增益控制器的增益单元的晶体管的固有寄生基极和发射极电阻而减小输出信号中的失真分量的装置电路。

4. 发明授权

US4467287A Signal expander 失效
标题翻译：信号扩展器
公开(公告)号：US4467287A
公开(公告)日：1984-08-21
申请号：US385054
申请日：1982-06-04
申请人： Joseph R. Aylward
发明人： Joseph R. Aylward
IPC分类号： H04B1/62 , H03G7/00 , H03G9/02 , H03F3/68
CPC分类号： H03G9/025
摘要： A signal conditioning system is disclosed for modifying the dynamic range of an electrical input signal. The system comprises gain control means for controlling the gain of the input signal as a function of a gain control signal, and control signal generating means for generating the gain control signal. In accordance with one aspect of the present invention the control signal generating means comprises (1) means for generating a first signal as a function of the amplitude of the input signal, and (2) means responsive to the first signal for generating the gain control signal as a function of only those portions of one polarity of the time derivative of the first signal. In accordance with another aspect of the present invention means are provided for substantially lengthening and/or linearizing the release behavior of the control signal waveform applied as the control signal input signal to the gain control means. In accordance with yet another aspect of the invention means are provided for adjustably shaping the release behavior of the control signal input signal to the gain control means.
摘要翻译：公开了用于修改电输入信号的动态范围的信号调节系统。该系统包括用于根据增益控制信号控制输入信号的增益的增益控制装置，以及用于产生增益控制信号的控制信号产生装置。根据本发明的一个方面，控制信号发生装置包括（1）用于根据输入信号的幅度产生第一信号的装置，以及（2）响应于第一信号产生增益控制的装置信号仅作为第一信号的时间导数的一个极性的那些部分的函数。根据本发明的另一方面，提供了用于将作为控制信号输入信号施加的控制信号波形的释放行为基本上延长和/或线性化到增益控制装置的手段。根据本发明的另一方面，提供了用于将控制信号输入信号的释放行为可调节地整形到增益控制装置的装置。

5. 发明授权

US4377792A Compander system 失效
标题翻译：压缩系统
公开(公告)号：US4377792A
公开(公告)日：1983-03-22
申请号：US387822
申请日：1982-06-14
申请人： David E. Blackmer , David R. Welland
发明人： David E. Blackmer , David R. Welland
IPC分类号： H03G1/00 , H03G7/00 , H04B1/64
CPC分类号： H03G7/002 , H03G1/0005
摘要： A signal conditioning system comprises an improved gain control module 10 and an improved detector 12 which are adapted to be manufactured in integrated circuit form.
摘要翻译：信号调节系统包括改进的增益控制模块10和改进的检测器12，其适于以集成电路形式制造。

6. 发明授权

US4316107A Multiplier circuit 失效
标题翻译：乘法电路
公开(公告)号：US4316107A
公开(公告)日：1982-02-16
申请号：US16148
申请日：1979-02-28
申请人： Daniel B. Talbot
发明人： Daniel B. Talbot
IPC分类号： G06G7/16 , G06G7/24 , G06G7/12
CPC分类号： G06G7/16
摘要： A multiplier circuit for controlling gain amplification of an electrical input signal responsively to a control signal comprises log conversion means for producing a log signal as a logarithmic function of the input signal, means for producing a multiplier signal as a function of the sum of the log signal and the control signal and antilog-conversion means for producing an antilog signal as an antilogarithmic function of the multiplied signal. The improvement is characterized by the log conversion means and antilog conversion means each including passive elements capable of exhibiting log-linear and antilog-linear transfer characteristics. The passive elements are preferably in the form of diode elements connected in a diode bridge.
摘要翻译：用于响应于控制信号控制电输入信号的增益放大的乘法器电路包括用于产生作为输入信号的对数函数的对数信号的对数转换装置，用于产生乘数信号作为日志的和的函数的装置信号和控制信号以及反对数转换装置，用于产生一个反相信号作为相乘信号的反对数函数。该改进的特征在于对数转换装置和反对数转换装置，每个包括能够显示对数线性和对数线性传输特性的无源元件。无源元件优选地是连接在二极管桥中的二极管元件的形式。

7. 发明授权

US4177356A Signal enhancement system 失效
标题翻译：信号增强系统
公开(公告)号：US4177356A
公开(公告)日：1979-12-04
申请号：US843949
申请日：1977-10-20
申请人： C. Rene Jaeger , Lawrence E. Blakely
发明人： C. Rene Jaeger , Lawrence E. Blakely
IPC分类号： H03G9/02 , H03G3/00 , H04R25/00
CPC分类号： H03G9/025
摘要： An improved expanding system is described for enhancing transmitted or recorded audio signals previously processed by anyone of several nonlinear amplifying techniques. The system is designed to divide the audio signal received into substantially discrete frequency bands and each band is separately expanded, independently of the other bands, so as to minimize "breathing" and "pumping".
摘要翻译：描述了一种改进的扩展系统，用于增强先前由几种非线性放大技术中的任何一种处理的传输或记录的音频信号。该系统被设计成将接收到的音频信号划分成基本上离散的频带，并且每个频带独立于其它频带分开扩展，以便最小化“呼吸”和“抽吸”。

8. 发明授权

US4503554A Stereophonic balance control system 失效
标题翻译：立体声平衡控制系统
公开(公告)号：US4503554A
公开(公告)日：1985-03-05
申请号：US569498
申请日：1984-01-09
申请人： Mark F. Davis
发明人： Mark F. Davis
IPC分类号： H04R1/22 , H04R1/26 , H04R1/40 , H04R3/04 , H04R3/14 , H04R5/02 , H04R5/00
CPC分类号： H04R3/14 , H04R1/227 , H04R1/26 , H04R1/403 , H04R3/04 , H04R5/02
摘要： The disclosure relates to an audio signal reproduction system having one or more of the following features: (1) a loudspeaker having (a) a flat frequency response and (b) a predetermined power response; (2) two loudspeakers adapted to be positioned relative to one another so that they reproduce a stereophonic image substantially independent of the listener's position along a listening line spaced from the loudspeakers and nonintersecting a line extending between the two speakers; (3) an improved cross-over network having a substantially constant input impedance as a function of frequency; (4) a power sensor for sensing the power applied to a transducer so that audio signals are transmitted over a first signal path through the system when the sensed power is above a predetermined minimum level, and over a second path when the sensed power falls below the minimum level; (5) a power monitoring circuit to prevent a loudspeaker driver from being overdriven; and (6) a circuit for substantially balancing the signal energy levels between two audio channels over a long period of time.
摘要翻译：本公开涉及具有以下特征中的一个或多个的音频信号再现系统：（1）具有（a）平坦频率响应和（b）预定功率响应的扬声器; （2）适于相对于彼此定位的两个扬声器，使得它们沿着与扬声器间隔开的聆听线基本上独立于收听者的位置再现立体声图像，并且不间断地在两个扬声器之间延伸的线; （3）具有作为频率的函数的基本上恒定的输入阻抗的改进的交叉网络; （4）功率传感器，用于感测施加到换能器的功率，使得当感测功率高于预定最小电平时，通过系统的第一信号路径传输音频信号，并且当感测功率低于第二路径时，通过第二路径最低水平; （5）用于防止扬声器驱动器过载的电力监控电路; 以及（6）用于在长时间内基本平衡两个音频通道之间的信号能级的电路。

9. 发明授权

US4471324A All NPN variably controlled amplifier 失效
标题翻译：所有NPN可变控制放大器
公开(公告)号：US4471324A
公开(公告)日：1984-09-11
申请号：US340878
申请日：1982-01-19
申请人： David R. Welland
发明人： David R. Welland
IPC分类号： H03G3/12 , H03G1/00 , H03G3/02 , H03G3/30 , H03G7/00 , H03G7/08
CPC分类号： H03G1/0005 , H03G7/002
摘要： A signal gain controlled system comprises an operational amplifier including a feedback path between the input and output terminals of the amplifier. The system includes first variable impedance means for varying the output voltage at the output terminal of the amplifier in response to and as a function of the input current signal applied to the input terminal and a first control signal. A signal path coupled between the output terminal of the operational amplifier and the output terminal of the system includes second variable impedance means for varying the output current of the system in response to and as a function of (a) the output voltage at the output of the amplifier and (b) a second control signal. The signal gain of the system is a function of the ratio of the second and first control signals.The preferred amplifier is the type having an input resistance and a feedback resistance, wherein at least one of the resistances includes a transistor which is biased to operate in its saturated region. The gain of the amplifier is a function of the control signal applied to the base of the saturated transistor.The signal gain controlled system can be utilized with a level sensing detector to provide signal compression or expansion.
摘要翻译：信号增益控制系统包括运算放大器，其包括放大器的输入和输出端之间的反馈路径。该系统包括用于响应于并且作为施加到输入端的输入电流信号和第一控制信号而改变放大器输出端的输出电压的第一可变阻抗装置。耦合在运算放大器的输出端和系统的输出端之间的信号通路包括第二可变阻抗装置，用于响应于（a）输出端的输出电压而改变系统的输出电流放大器和（b）第二控制信号。系统的信号增益是第二和第一控制信号的比率的函数。优选的放大器是具有输入电阻和反馈电阻的类型，其中至少一个电阻包括被偏置以在其饱和区域中工作的晶体管。放大器的增益是施加到饱和晶体管基极的控制信号的函数。信号增益控制系统可以与电平检测检测器一起使用，以提供信号压缩或扩展。

10. 发明授权

US4434380A Compensation for VCA OP amp errors 失效
标题翻译： VCA运算放大器错误的补偿
公开(公告)号：US4434380A
公开(公告)日：1984-02-28
申请号：US316754
申请日：1981-10-30
申请人： David R. Welland
发明人： David R. Welland
IPC分类号： H03G3/10 , H03G1/00 , G06G7/26 , G06G7/24
CPC分类号： H03G1/0005
摘要： An improved multiplier circuit of the type including an input operational amplifier and a gain cell is disclosed. The gain cell is connected to the amplifier such that a first signal can be generated in response to and as a logarithmic function of an input signal, a control signal can be added to the first signal and a second signal can be algebraically generated as an antilogarithmic function of the algebraic sum of the first and control signals. The improvement includes means for providing a correcting signal as a function of the control signal at the output of the input amplifier substantially equal and opposite to signals produced at the output of the input amplifier by changes in the control signal.
摘要翻译：公开了一种包括输入运算放大器和增益单元的改进的乘法器电路。增益单元连接到放大器，使得可以响应于输入信号的对数函数和作为输入信号的对数函数产生第一信号，可以将控制信号添加到第一信号，并且可以将代码生成第二信号作为反对数第一和控制信号的代数和的函数。该改进包括用于在输入放大器的输出处提供校正信号作为函数的装置，该输入放大器的输出基本上与输入放大器的输出端产生的信号基本上相等并且与控制信号的变化相反。

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