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1. 发明授权

US4034308A Amplifier with controllable transmission factor and switchable control characteristic 失效
标题翻译：具有可控传输系数和可切换控制特性的放大器
公开(公告)号：US4034308A
公开(公告)日：1977-07-05
申请号：US703119
申请日：1976-07-06
申请人： Jurgen Wermuth , Gerhard Dickopp , Ernst Schroder
发明人： Jurgen Wermuth , Gerhard Dickopp , Ernst Schroder
IPC分类号： H03G1/00 , H03G5/04 , H03G9/02 , H03F1/36
CPC分类号： H03G9/025 , H03G1/0035 , H03G1/007 , H03G5/04
摘要： An amplifier circuit whose gain bears a desired relation to a control voltage, including a differential amplifier, a plurality of impedances interconnected between the amplifier terminals and switches interconnected with the impedances and switchable between two states which create two impedance configurations that give the circuit mutually complementary gain vs. control voltage control characteristics.
摘要翻译：一种放大器电路，其增益与控制电压具有期望的关系，包括差分放大器，互连在放大器端子之间的多个阻抗和与阻抗互连的开关，并在两个状态之间切换，这两个状态产生两个阻抗配置，使电路互补增益与控制电压控制特性。

2. 发明授权

US4321482A Circuit system for the generation of a direct control voltage which is dependent on an alternating voltage 失效
标题翻译：用于产生取决于交流电压的直接控制电压的电路系统
公开(公告)号：US4321482A
公开(公告)日：1982-03-23
申请号：US56971
申请日：1979-07-11
申请人： Ernst Schroder , Jurgen Wermuth
发明人： Ernst Schroder , Jurgen Wermuth
IPC分类号： H04B1/64 , H03G7/00 , H03K4/00 , H03K5/159 , H03K5/00
CPC分类号： H03G7/00 , H03K4/00
摘要： In a circuit system for the generation of a direct control voltage dependent upon an alternating voltage for a dynamic compander device, the system including a charging capacitor, a charging circuit connected to charge the capacitor, and a circuit connected to discharge the capacitor, a comparator unit is connected to effect comparison between the alternating voltage and a reference voltage and to produce an output voltage representative of the amount by which the alternating voltage exceeds the reference voltage, and at least one of the circuits is formed of a current source and an electronically controllable current path connected between the source and the capacitor and having a control input connected to the comparator unit for varying the conductance of the current path as a function of the output voltage of the comparator unit.
摘要翻译：在用于产生取决于用于动态压缩扩展装置的交流电压的直接控制电压的电路系统中，该系统包括充电电容器，连接到对电容器充电的充电电路以及连接到放电电容器的电路，比较器连接单元以实现交流电压和参考电压之间的比较，并产生表示交流电压超过参考电压的量的输出电压，并且至少一个电路由电流源和电子可控电流路径连接在源极和电容器之间，并且具有连接到比较器单元的控制输入，用于根据比较器单元的输出电压来改变电流路径的电导。

3. 发明授权

US4278945A Circuit for the generation of a control variable for the control of the transfer constant of electronically actuable amplifying and attenuating members 失效
标题翻译：用于产生用于控制电子可致动的放大和衰减构件的传递常数的控制变量的电路
公开(公告)号：US4278945A
公开(公告)日：1981-07-14
申请号：US80949
申请日：1979-10-01
申请人： Ernst Schroder , Jurgen Wermuth
发明人： Ernst Schroder , Jurgen Wermuth
IPC分类号： H03G3/12 , G06G7/24 , H03G3/20 , H03G7/00 , H03G3/00 , H03H7/24
CPC分类号： H03G7/002 , G06G7/24
摘要： In a circuit for automatic dynamic compression or expansion the control voltage generator generates a control voltage which is linear against the logarithm of the input amplitude. This characteristic is achieved by a transfer member consisting of several transistors which are subject to different reference voltages and the series resistances of which are staggered.
摘要翻译：在用于自动动态压缩或扩展的电路中，控制电压发生器产生与输入幅度的对数线性相关的控制电压。这个特性由一个由几个晶体管组成的传输元件来实现，这些晶体管受到不同的参考电压的影响，串联电阻是交错的。

4. 发明授权

US4903020A Method and apparatus for digitally processing stored compressed analog signals 失效
标题翻译：用于数字处理存储的压缩模拟信号的方法和装置
公开(公告)号：US4903020A
公开(公告)日：1990-02-20
申请号：US254117
申请日：1988-10-05
申请人： Jurgen Wermuth , Heinz Gockler
发明人： Jurgen Wermuth , Heinz Gockler
IPC分类号： H03M1/00 , G11B20/00 , G11B20/02 , G11B27/024 , G11B27/026 , G11B27/028 , G11B27/031 , G11B27/032 , G11B27/034 , H03G7/00 , H03M7/50
CPC分类号： G11B20/00007 , G11B20/02 , G11B27/028 , G11B27/031 , H03G7/007 , G11B2220/20 , G11B2220/90 , G11B2220/913 , G11B27/024 , G11B27/026 , G11B27/032 , G11B27/034
摘要： Method and apparatus for processing compressed, stored analog signals, such as audio signals, from a storage medium, including first converting the signals to digital signals and thereafter expanding the signals.To realize a large volume range in the conversion of compressed recorded signals to expand digital signals, the compressed analog signals picked up from a storage medium are initially analog/digital converted and only then digitally expanded.
摘要翻译：用于从存储介质处理压缩的，存储的诸如音频信号的模拟信号的方法和装置，包括首先将信号转换成数字信号，然后扩展信号。为了在压缩记录信号的转换中实现大的音量范围以扩展数字信号，从存储介质拾取的压缩模拟信号最初被模拟/数字转换，然后才被数字扩展。

5. 发明授权

US4190806A Circuit arrangement for the selective compression or expansion of the dynamic range of a signal 失效
标题翻译：用于选择性压缩或扩展信号动态范围的电路布置
公开(公告)号：US4190806A
公开(公告)日：1980-02-26
申请号：US943978
申请日：1978-09-20
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： H04B1/64 , G11B20/04 , H03G7/00 , H03G9/02
CPC分类号： H03G9/025 , H03G7/00
摘要： A compander system is described, in which the `compression` and `expansion` modes are established by the selective use of a compression or expansion circuit as such or as a negative feed-back branch for a back-coupled amplifier.
摘要翻译：描述了压缩扩展系统，其中通过选择性地使用压缩或扩展电路或者用于背耦合放大器的负反馈分支来建立“压缩”和“扩展”模式。

6. 发明授权

US3969680A Automatic dynamic compander system 失效
标题翻译：自动动态压缩扩展系统
公开(公告)号：US3969680A
公开(公告)日：1976-07-13
申请号：US543931
申请日：1975-01-24
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： G11B20/04 , H03G3/20 , H03G7/00 , H03G9/02 , H03G9/18 , H04B1/64
CPC分类号： H03G3/301 , H03G7/004 , H03G9/025 , H03G9/18 , H04B1/64
摘要： In a circuit for the automatic dynamic compression or expansion of a signal between its input and its output, the circuit presenting a useful signal path connected between its input and its output and containing a setting member which is electronically controllable for varying the transmission factor between the circuit input and output, the circuit also presenting a branch path connected at one point to the useful signal path and containing a control voltage generator for generating, from the signal in the useful signal path, a control voltage applied to control the setting member, there is also provided a second setting member connected in the branch path and arranged to be electronically controllable for varying the transmission factor exhibited by the branch path, and means connecting the output of the control voltage generator to the second setting member for effecting a counterregulation of the transmission factor of the branch path, relative to the transmission factor variation imparted to the useful signal path.
摘要翻译：在用于在其输入和输出之间自动动态压缩或扩展信号的电路中，该电路呈现连接在其输入端与其输出端之间的有用信号路径，并且包含可电子控制的设定元件，用于改变电路输入和输出，电路还呈现分支路径，其一端连接到有用信号路径并且包含控制电压发生器，用于从有用信号路径中的信号产生用于控制设定构件的控制电压，那里还设置有连接在分支路径中的第二设置构件，并且被布置为可电子控制以改变由分支路径显示的传输因素，以及将控制电压发生器的输出连接到第二设置构件的装置，以实现对分支路径的传输因子相对于传输因子变化赋予有用的信号路径。

7. 发明授权

US4791385A Voltage controlled amplifier for symmetrical electrical signals 失效
标题翻译：用于对称电信号的电压控制放大器
公开(公告)号：US4791385A
公开(公告)日：1988-12-13
申请号：US69537
申请日：1987-07-01
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： H03F1/30 , H03G1/04 , H03G3/12 , H03G7/00 , H03G3/30
CPC分类号： H03G7/001 , H03F1/302 , H03G1/04
摘要： To correct temperature caused changes in symmetry and gain in a voltage controlled amplifier including a logarithm circuit and an antilog circuit, an auxiliary voltage proportional to the absolute temperature is provided to control the antilog circuit; this auxiliary voltage is also contained as a factor in a voltage which controls both the logarithm and the antilog circuits.
摘要翻译：为了纠正温度导致包括对数电路和反对数电路的电压控制放大器的对称性和增益变化，提供与绝对温度成比例的辅助电压以控制防电路电路; 该辅助电压也被包含在控制对数和对数电路两者的电压中的因素。

8. 发明授权

US4415866A Circuit for dynamic compression and/or expansion 失效
标题翻译：用于动态压缩和/或扩展的电路
公开(公告)号：US4415866A
公开(公告)日：1983-11-15
申请号：US324661
申请日：1981-11-24
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： H04B1/62 , H03G7/00 , H03G3/30 , G06G7/24
CPC分类号： H03G7/002
摘要： In a circuit for the automatic dynamic compression or expansion of a signal, the circuit presenting a useful signal path containing a first variable gain member which is electronically controllable for varying the transmission factor between the circuit input and output, a branch path connected at one point to the useful signal path and containing a control voltage generator for generating a control voltage from the signal at such point in the useful signal path, and a second variable gain member which is connected in the branch path and which is electronically controllable for varying the transmission factor exhibited by the branch path, with the transmission factor of the useful signal path being controlled to have a value dependent on the value of the control voltage and a counterregulation of the transmission factor of the branch path being effected relative to the transmission factor variation imparted to the useful signal path, the useful signal path includes a device causing the signal at one point along that path to have a value proportional to the logarithm of the signal at the circuit input, the branch path has its input point connected to the one point of the useful signal path, each variable gain member has an antilogarithmic transmission factor, and the output of the control voltage generator serves to vary the gain of each said variable gain member as an exponential function of the control voltage.
摘要翻译：在用于信号的自动动态压缩或扩展的电路中，电路呈现有用的信号路径，其包含可电子控制的第一可变增益元件，用于改变电路输入和输出之间的传输因子，一端连接的分支路径到有用信号路径并且包含用于从有用信号路径中的这个点处的信号产生控制电压的控制电压发生器，以及连接在分支路径中并且可电子控制以用于改变传输的第二可变增益部件由分支路径展现的因子，其中有用信号路径的传输因子被控制为具有取决于控制电压的值的值和相对于所传送的传输因子变化而影响的分支路径的传输因子的反调节到有用的信号路径，有用的信号路径包括引起该信号的装置信号在沿着该路径的一个点处具有与电路输入处的信号的对数成比例的值，分支路径的输入点连接到有用信号路径的一个点，每个可变增益元件具有反对数传输因子，并且控制电压发生器的输出用作改变每个所述可变增益部件的增益作为控制电压的指数函数。

9. 发明授权

US4758797A Amplifier with compressor and expander function for ground symmetrical electrical signals 失效
标题翻译：具有压缩机和扩展器功能的放大器功能用于地对称电信号
公开(公告)号：US4758797A
公开(公告)日：1988-07-19
申请号：US886442
申请日：1986-07-17
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： H03G1/04 , H03G7/00 , H03F1/20 , H03G3/18
CPC分类号： H03G1/04 , H03G7/002
摘要： An amplifier for ground symmetrical signals includes a compressor at the input and an expander at the output, with the slope of at least one of its expansion or compression characteristics being adjustable for at least one half-wave polarity with the aid of an adjustment voltage. In order to reduce second order distortions at the amplifier output, a circuit is provided for determining the arithmetic mean value of the voltage across the amplifier output. A control value is produced from the determined mean value and the slope of the expansion or compression characteristic is regulated with this control value in the opposite direction so that the distortions are reduced.
摘要翻译：用于接地对称信号的放大器包括输入端的压缩机和输出端的扩展器，借助于调整电压，其扩展或压缩特性中的至少一个的斜率可调节至少一个半波极性。为了减小放大器输出端的二阶失真，提供了一个电路，用于确定放大器输出端的电压的算术平均值。从确定的平均值产生控制值，并且通过该控制值在相反方向上调节膨胀或压缩特性的斜率，从而减小失真。

10. 发明授权

US4725789A Circuit arrangement for a low-noise audio frequency source 失效
标题翻译：电路布置用于低噪声音频源
公开(公告)号：US4725789A
公开(公告)日：1988-02-16
申请号：US901620
申请日：1986-08-29
申请人： Jurgen Wermuth
发明人： Jurgen Wermuth
IPC分类号： H03G3/02 , H03F1/26 , H03F1/56 , H03H11/28
CPC分类号： H03H11/28 , H03F1/56
摘要： A circuit arrangement for coupling alternating voltage signals having frequencies within the audio frequency range between a low noise audio frequency source and a zero ohm amplifier, wherein the audio frequency source has a known source impedance. The circuit arrangement includes an output connected to the zero ohm amplifier and a highly resistant input for receiving the alternating voltage signals from the audio frequency source. The input is more resistant by at least one power of ten than the source impedance of the audio frequency source and the arrangement has a voltage amplification factor which is so low that no overshooting of the output signal will happen at the maximum occcurring voltage of the signals received at its input. The output of the arrangement is configured as a short-circuit resistant alternating current source which furnishes a maximum effective current of at least 10 mA. The equivalent noise resistance of the arrangement is maintained to be at most 20% of the equivalent noise resistance of the audio frequency. Any branch circuit included in the arrangement and connected to its output is so highly resistant that the internal gain of the subsequently connected zero ohm amplifier is not raised significantly, thereby causing no significant increase in noise in the zero ohm amplifier.
摘要翻译：一种用于耦合在低噪声音频源和零欧姆放大器之间具有音频范围内的频率的交流电压信号的电路装置，其中音频源具有已知的源阻抗。电路装置包括连接到零欧姆放大器的输出端和用于从音频源接收交流电压信号的高阻抗输入端。该输入通过比音频源的源阻抗10的至少一个功率更强的电阻，并且该布置具有如此低的电压放大因子，使得在信号的最大发生电压下不会发生输出信号的过冲在其输入收到。该装置的输出被配置为提供至少10mA的最大有效电流的短路电阻交流电源。该装置的等效噪声电阻被保持为音频的等效噪声电阻的至多20％。包括在该布置中并连接到其输出的任何分支电路具有如此高的电阻，使得随后连接的零欧姆放大器的内部增益不会显着上升，从而不会在零欧姆放大器中产生明显的噪声增加。

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