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1. 发明授权

US6111965A Method and apparatus for offset compensation of a signal processing circuit 失效
标题翻译：信号处理电路的偏移补偿方法和装置
公开(公告)号：US6111965A
公开(公告)日：2000-08-29
申请号：US900322
申请日：1997-07-25
申请人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
发明人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
IPC分类号： H03K5/1536 , H03F1/30 , H03F3/34 , H03G1/00 , H03G3/30 , H04B15/00 , G01R19/00 , H03F1/14 , H03F3/45
CPC分类号： H03G1/0088 , H03F1/304 , H03G3/3026
摘要： A method for offset compensation of a signal processing circuit in whose signal path a circuit configuration with offset is disposed, wherein the circuit configuration with offset is temporarily decoupled from the signal path of the signal processing circuit and meanwhile held strictly in a dc mode; a compensating dc voltage is added to the output dc voltage occurring at the output of the circuit configuration with offset in the dc mode, said compensating dc voltage being varied until the cumulative value of output dc voltage and compensating dc voltage has became zero; the circuit configuration with offset is then coupled into the signal path again; andfrom then on the compensating dc voltage occurring at the cumulative value zero is permanently added to the output signal of the circuit configuration with offset until a new offset compensating process is performed.
摘要翻译：一种信号处理电路的偏移补偿方法，其信号路径中设置有偏移电路配置，其中具有偏移的电路配置与信号处理电路的信号路径暂时解耦，同时严格保持在直流模式; 补偿直流电压被添加到在直流模式下具有偏移的电路配置的输出处出现的输出直流电压，所述补偿直流电压改变直到输出直流电压和补偿直流电压的累积值变为零; 然后将具有偏移的电路配置再次耦合到信号路径中; 并且从那时起，累积值为零的补偿直流电压被永久地添加到具有偏移的电路配置的输出信号中，直到执行新的偏移补偿处理。

2. 发明授权

US5995817A Device for varying the cutoff frequency of a low-pass filter 失效
标题翻译：用于改变低通滤波器的截止频率的装置
公开(公告)号：US5995817A
公开(公告)日：1999-11-30
申请号：US900932
申请日：1997-07-25
申请人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
发明人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
IPC分类号： H04B1/10 , H03G5/22 , H04B1/06
CPC分类号： H03G5/005 , H03G5/22
摘要： For eliminating the emphasis given an audio signal in the transmitter, an audio signal processor of an audio device (e.g., a car radio) contains a low-pass filter. In order to attenuate the spurious higher-frequency signal fractions in case of poor reception and accordingly low received field strength, the cutoff frequency of the low-pass filter is shifted in the direction of lower frequencies in accordance with a received field strength signal when the field strength becomes lower. In order to avoid external adjusting components and save pins on the IC chip, the field strength signal is supplied to an analog-to-digital converter and the latter supplies a digital signal to a low-pass filter whose cutoff frequency is variable. For this purpose the low-pass filter contains a number of integrated components one of which is connected or disconnected by a digit place of the digital signal in each case.
摘要翻译：为了消除在发射机中给出音频信号的强调，音频设备（例如，汽车无线电）的音频信号处理器包含低通滤波器。为了在接收不良的情况下衰减寄生的较高频率信号分数，因此在较低的接收场强下，根据接收的场强信号，低通滤波器的截止频率根据接收的场强信号在低频的方向上移位，场强变低。为了避免外部调整部件并在IC芯片上节省引脚，场强信号被提供给模数转换器，后者将数字信号提供给截止频率可变的低通滤波器。为此，低通滤波器包含多个集成组件，其中一个组件在每种情况下都由数字信号的数字位置连接或断开。

3. 发明授权

US5953430A Filter circuit and audio signal processor provided therewith 失效
标题翻译：滤波器电路和音频信号处理器
公开(公告)号：US5953430A
公开(公告)日：1999-09-14
申请号：US900606
申请日：1997-07-25
申请人： Peter Kirchlechner , Jorg Schambacher , Jurgen Lubbe
发明人： Peter Kirchlechner , Jorg Schambacher , Jurgen Lubbe
IPC分类号： H03H19/00 , H03G5/00 , H03G5/02 , H03G9/00 , H03B1/00
CPC分类号： H03G5/02 , H03G5/00
摘要： A filter circuit adjustably decreases or increases the amplitude of audio signals in a predetermined frequency range. The filter circuit includes a filter module having an RC network with at least one frequency-response-determining RC member whose resistor component R is realized in SC technology. A setting device is connected to the filter module such that its setting determines the frequency response of the SC filter. The setting device renders possible a neutral setting in which the effective audio signal path of the filter circuit circumvents the filter module so that no decrease or increase of the amplitude of individual frequency portions takes place. Furthermore, an audio signal processor comprises at least one audio signal input, at least one audio signal output, and at least one control input. The audio signal processor also comprises an audio signal processing unit connected between the audio signal input and the audio signal output, with the audio signal processing unit having at least one such filter circuit.
摘要翻译：滤波器电路在预定频率范围内可调节地降低或增加音频信号的幅度。滤波器电路包括具有RC网络的滤波器模块，其具有至少一个频率响应确定RC部件，其电阻器部件R以SC技术实现。设置装置连接到滤波器模块，使其设置确定SC滤波器的频率响应。设置装置使得中性设置成为可能，其中滤波器电路的有效音频信号路径绕过滤波器模块，使得不会发生单个频率部分的振幅的降低或增加。此外，音频信号处理器包括至少一个音频信号输入，至少一个音频信号输出和至少一个控制输入。音频信号处理器还包括连接在音频信号输入和音频信号输出之间的音频信号处理单元，音频信号处理单元具有至少一个这样的滤波器电路。

4. 发明授权

US5920632A Apparatus for continuously switching a demodulator from stereo operation to mono operation, and vice versa 失效
标题翻译：用于将解调器从立体声操作连续切换到单声道操作的装置，反之亦然
公开(公告)号：US5920632A
公开(公告)日：1999-07-06
申请号：US900608
申请日：1997-07-25
申请人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
发明人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
IPC分类号： H04S7/00 , H04B1/16 , H04H20/88 , H04S1/00 , H04H5/00
CPC分类号： H04B1/1676 , H04S1/007
摘要： In a stereo decoder, channel separation takes place with the aid of a demodulator to acquire signals for stereo operation. At low received field strength there is a continuous switchover to mono operation for each channel in the demodulator. For this purpose a switch is located in a signal path between input and output of the demodulator and driven by a PWM signal whose pulse-width repetition rate determines whether solely mono operation, solely stereo operation or a mixture of the two takes place. For generating the PWM signal, the field strength signal is compared with a triangular signal. To permit the switchover points between stereo and mono operation to be aligned by the manufacturer in accordance with the amplitude of the field strength signal, the apparatus contains two limit storage registers in which digital limit signals are set from outside. These limit signals are converted by a digital-to-analog converter into analog voltages which fix upper and lower limits the triangular signal, thereby determining the behavior of the triangular signal and thus also the pulse-width repetition rate of the PWM signal in accordance with the field strength signal.
摘要翻译：在立体声解码器中，通过解调器进行信道分离以获得用于立体声操作的信号。在低接收场强下，解调器中的每个通道都会连续切换到单声道操作。为此，开关位于解调器的输入和输出之间的信号路径中，并由PWM信号驱动，其脉冲宽度重复率决定是单独执行单声道操作，仅仅是立体声操作或两者的混合。为了产生PWM信号，将场强信号与三角形信号进行比较。为了允许制造商根据场强信号的幅度使立体声和单声道操作之间的切换点对齐，该装置包含两个限制存储寄存器，其中从外部设置数字限制信号。这些极限信号由数模转换器转换成模拟电压，其将上限和下限固定在三角形信号上，从而确定三角形信号的行为，并因此确定PWM信号的脉冲宽度重复率场强信号。

5. 发明授权

US6101257A Audio signal processor 失效
标题翻译：音频信号处理器
公开(公告)号：US6101257A
公开(公告)日：2000-08-08
申请号：US900930
申请日：1997-07-25
申请人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
发明人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
IPC分类号： H04B1/08 , H03G5/00
CPC分类号： H04B1/082
摘要： An audio signal processor is disclosed which has at least one audio signal input and at least one audio signal output as well as at least one control input, and an audio signal processing unit connected between audio signal input and audio signal output, the audio signal processing unit having a programmable indicator tone generator circuit to be driven via the control input and whose indicator tone signal is switched to the audio signal output in accordance with the state of the control input.
摘要翻译：公开了一种音频信号处理器，其具有至少一个音频信号输入和至少一个音频信号输出以及至少一个控制输入，以及连接在音频信号输入和音频信号输出之间的音频信号处理单元，音频信号处理单元具有可编程的指示符乐音发生器电路，经由控制输入驱动，并且根据控制输入的状态将其指示音信号切换到音频信号输出。

6. 发明授权

US5955919A Nonlinearity compensation in an electric signal processing circuit 失效
标题翻译：电信号处理电路中的非线性补偿
公开(公告)号：US5955919A
公开(公告)日：1999-09-21
申请号：US900426
申请日：1997-07-25
申请人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
发明人： Jurgen Lubbe , Peter Kirchlechner , Jorg Schambacher
IPC分类号： H03G1/00 , H03G3/12
CPC分类号： H03F3/45475 , H03F1/3211 , H03G1/0088 , H03F2203/45534
摘要： An electric signal processing circuit with an operational amplifier having a signal input, a feedback input and a signal output, and a nonlinear circuit device having a characteristic with a distortion-producing nonlinearity and located in the input signal circuit or in the feedback circuit of the operational amplifier, wherein a compensating circuit device having a characteristic with generally the same nonlinearity as the characteristic of the nonlinear circuit device is disposed in the feedback circuit or in the input signal circuit of the operational amplifier for compensating the distortion of the nonlinear circuit device.
摘要翻译：具有具有信号输入，反馈输入和信号输出的运算放大器的电信号处理电路和具有失真产生非线性的特性的非线性电路装置，位于输入信号电路或反馈电路的反馈电路中运算放大器，其中具有与非线性电路装置的特性大致相同的非线性的特性的补偿电路装置设置在用于补偿非线性电路装置的失真的运算放大器的反馈电路或输入信号电路中。

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