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91. 发明授权

US4696032A Voice switched gain system 失效
标题翻译：语音切换增益系统
公开(公告)号：US4696032A
公开(公告)日：1987-09-22
申请号：US705935
申请日：1985-02-26
申请人： Allan Levy
发明人： Allan Levy
IPC分类号： H03G3/34 , H04M9/08 , H04R25/00 , H04R3/06
CPC分类号： H04M9/08 , H03G3/342 , H04R2225/43 , H04R25/50
摘要： A voice switched gain system is disclosed for loudspeaking telephone and hearing aid applications involving electret microphones. A voice switched gain circuit comprises an audio pre-conditioning circuit for providing a conditioned audio input referenced to an unconditioned audio input to a compandor circuit. A linear gain level reference generator circuit generates a level for comparison with the audio input level. A decision circuit then controls the compandor operation based on the result of the comparison. The decision circuit either maintains the audio output of the compandor in a compressed state or expands the audio input signal to a higher level expanded state for transmission. Two such circuits are provided in a loudspeaking telephone system, one circuit for maintaining a preemptive near end control through appropriate timing of the dual decision process. Far end control is provided by the other voice switched gain circuit. Altogether three states of operation are possible, an idle state, near end control and far end control. In one embodiment, a dial preemption circuit is disclosed so that during dialing the loudspeaking telephone only broadcasts dialing signals.
摘要翻译：公开了用于涉及驻极体麦克风的扬声电话和助听器应用的语音切换增益系统。语音切换增益电路包括音频预处理电路，用于将参考无条件音频输入的调节音频输入提供给压缩电路。线性增益电平参考发生器电路产生与音频输入电平进行比较的电平。然后，判定电路基于比较的结果控制压缩器操作。判定电路将压缩器的音频输出保持在压缩状态，或将音频输入信号扩展到更高级别的扩展状态以进行传输。两个这样的电路设置在扬声电话系统中，一个电路用于通过双重决策过程的适当定时来维持优先的近端控制。远端控制由另一语音切换增益电路提供。总共有三种操作状态，空闲状态，近端控制和远端控制。在一个实施例中，公开了拨号抢占电路，使得在拨号期间，扬声电话仅广播拨号信号。

92. 发明授权

US4683386A Electronic attenuation value control circuit in which switching noise is suppressed 失效
标题翻译：抑制开关噪声的电子衰减值控制电路
公开(公告)号：US4683386A
公开(公告)日：1987-07-28
申请号：US634693
申请日：1984-07-26
申请人： Toshio Kamikawara
发明人： Toshio Kamikawara
IPC分类号： H03G3/00 , H03G3/34 , H03H7/25 , H03K17/16 , H03K17/693 , H03H7/24
CPC分类号： H03G3/348 , H03H7/25 , H03K17/162 , H03K17/693
摘要： A digital controlled volume attenuator includes a plurality of resistors connected in series between a signal input terminal and a reference potential point and a plurality of electronic switches having one ends respectively connected to the connection points among resistors and the other ends connected in common. One of signals at the respective connection points among resistors is selected by making either one of the switches conductive to control the volume. A muting circuit is provided between a signal output terminal and the common connection point of the switches to prevent the switching noise generated by the switches from being supplied to the signal output terminal.
摘要翻译：数字控制体积衰减器包括串联连接在信号输入端和参考电位点之间的多个电阻器，以及多个电子开关，其一端分别连接到电阻器和另一端共同连接的连接点。通过使开关中的任一个导通以控制体积来选择电阻器之间的各个连接点处的信号之一。在信号输出端子和开关的公共连接点之间提供静音电路，以防止开关产生的开关噪声被提供给信号输出端子。

93. 发明授权

US4675867A Data processing device 失效
标题翻译：数据处理装置
公开(公告)号：US4675867A
公开(公告)日：1987-06-23
申请号：US680299
申请日：1984-12-11
申请人： Toshiyuki Masui , Masahide Hirasawa , Susumu Kozuki , Motokazu Kashida , Masahiro Takei , Kenichi Nagasawa
发明人： Toshiyuki Masui , Masahide Hirasawa , Susumu Kozuki , Motokazu Kashida , Masahiro Takei , Kenichi Nagasawa
IPC分类号： G06F11/00 , H03G3/34
CPC分类号： H03G3/345 , G06F11/00 , G06F11/076
摘要： A data processing device for processing data including a first data sequence indicative of the amplitude of an information signal and a second data sequence each data of which indicates the error rate of each data of the first data sequence. When each data of the second data sequence continuously shows a high error rate of a consecutive number of data of the first data sequence more than a predetermined number, the device generates data of values which are 1/a.sup.k (wherein "k" represents an integer between 1 and "n"; "a" a real number larger than 1; and "n" an integer at least 2) of a data of the first data sequence which has a low error rate and is located before or after the consecutive high error rate data of the first data sequence. The device performs data processing for muting the information signal by using these data.
摘要翻译：一种数据处理装置，用于处理包括指示信息信号的幅度的第一数据序列的数据和第二数据序列，每个数据序列指示第一数据序列的每个数据的错误率。当第二数据序列的每个数据连续地显示第一数据序列的连续数量的高错误率大于预定数量时，该装置产生1 / ak值的数据（其中“k”表示整数 1和“n”之间的“a”，“a”大于1的实数;以及“连续高”之前或之后的第一数据序列的数据的“n”至少为2的整数）第一数据序列的错误率数据。该设备通过使用这些数据执行用于使信息信号静音的数据处理。

94. 发明授权

US4670720A Switching device for suppressing a signal 失效
标题翻译：用于抑制信号的开关装置
公开(公告)号：US4670720A
公开(公告)日：1987-06-02
申请号：US799877
申请日：1985-11-20
申请人： Eise C. Dijkmans
发明人： Eise C. Dijkmans
IPC分类号： H03F1/00 , H03F3/72 , H03G3/34 , H03K17/16 , H03K17/60 , H03F1/26
CPC分类号： H03F3/72 , H03G3/348
摘要： A switching device is provided for suppressing a signal. A signal source is connected to a first differential amplifier. The first differential amplifier receives an operating current from a current source. A second differential amplifier receives an operating current from a current source, and has an input connected to a common signal terminal. A conversion circuit connects the first differential amplifier and second differential amplifier outputs. An output amplifier is connected to the conversion circuit output for amplifying a single ended output of the conversion circuit. A signal from the output amplifier is suppressed by switching the operating current of said first differential amplifier and said output amplifier off, while simultaneously switching the operating current of the second differential amplifier on.
摘要翻译：提供用于抑制信号的开关装置。信号源连接到第一差分放大器。第一差分放大器从电流源接收工作电流。第二差分放大器从电流源接收工作电流，并具有连接到公共信号端子的输入端。 A转换电路连接第一差分放大器和第二差分放大器输出。输出放大器连接到转换电路输出端，用于放大转换电路的单端输出。通过在同时切换第二差分放大器的工作电流的同时切换所述第一差分放大器和所述输出放大器的工作电流来抑制来自输出放大器的信号。

95. 发明授权

US4627102A Squelch circuit 失效
标题翻译：静噪电路
公开(公告)号：US4627102A
公开(公告)日：1986-12-02
申请号：US713387
申请日：1985-02-15
申请人： Henry A. Nott
发明人： Henry A. Nott
IPC分类号： H03G3/34 , H04B1/10
CPC分类号： H03G3/34
摘要： A squelch circuit in which a phase locked loop (PLL) (5) having a voltage controlled oscillator (VCO) (7) and a phase comparator (10) is used to detect the number of zero crossings, these being low for a speech signal and high for noise. The error voltage produced in the phase locked loop (5) is fed through a network (12) which ensures that the matching of the input signal to the oscillator is faster when the input frequency drops than when the input frequency rises. The input signal is clipped to enhance the frequency spectra of speech by using a limiting amplifier. The muting gate (2) output is derived from the VCO (7) control voltage of the PLL (5) to mute the output of the receiver when the VCO (7) output frequency is higher than a pre-set frequency for more than a pre-set time.
摘要翻译： PCT No.PCT / AU84 / 00112 Sec。 371日期1985年2月15日 102（e）日期1985年2月15日PCT Filed 1984年6月21日PCT公布。公开号WO85 / 00256 1985年1月17日，在其中使用具有压控振荡器（VCO）（7）和相位比较器（10）的锁相环（PLL）（5）的静噪电路来检测过零点数，这些对于语音信号是低的，对于噪声是高的。在锁相环（5）中产生的误差电压通过网络（12）馈送，这确保输入信号与振荡器的匹配在输入频率下降时比输入频率上升时更快。通过使用限幅放大器来限制输入信号以增强语音的频谱。当VCO（7）输出频率高于预设频率时，静噪门（2）输出源自PLL（5）的VCO（7）控制电压，以使接收机的输出静音多于预设时间。

96. 发明授权

US4584714A Automotive radio receiver with radio frequency interference elimination circuit 失效
标题翻译：具有射频干扰消除电路的汽车无线电接收机
公开(公告)号：US4584714A
公开(公告)日：1986-04-22
申请号：US621931
申请日：1984-06-18
申请人： Hiroshige Fukuhara
发明人： Hiroshige Fukuhara
IPC分类号： H03G3/34 , H04B1/10
CPC分类号： H03G3/345
摘要： An automotive radio receiver with a radio frequency interference elimination includes a noise detector adapted to detect noise in the power source wiring and a circuit for eliminating radio frequency interference noise. The detector is physically connected to the power source wiring so that it can satisfactorily detect noise in the power source wiring such as spark ignition noise and switching noise of the automotive electric equipment. The noise elimination circuit includes a switch normally closed and responsive to the noise signal produced by the noise detector to open, and a capacitor for holding the radio signal level while the switch is opened and discharging the constant-level signal for reproduction of the radio sound.
摘要翻译：具有射频干扰消除的汽车无线电接收机包括适于检测电源布线中的噪声的噪声检测器和用于消除射频干扰噪声的电路。检测器物理连接到电源布线，从而能够令人满意地检测电力线路中的噪音，例如汽车电气设备的火花点火噪音和开关噪声。噪声消除电路包括常开的开关，并且响应于由噪声检测器产生的噪声信号而断开;以及电容器，用于在开关断开时保持无线电信号电平，并且对恒定电平信号进行放电以再现无线电声音。

97. 发明授权

US4574390A Noise reduction for stereophonic FM signals by high-speed sampling and linear interpolation 失效
标题翻译：通过高速采样和线性插值降低立体声FM信号
公开(公告)号：US4574390A
公开(公告)日：1986-03-04
申请号：US594683
申请日：1984-03-26
申请人： Kazutoshi Hirohashi , Yukinobu Ishigaki
发明人： Kazutoshi Hirohashi , Yukinobu Ishigaki
IPC分类号： H03G3/34 , H04B1/16 , H04H5/00
CPC分类号： H04B1/1661 , H03G3/345
摘要： In a noise reduction circuit for reception of stereophonic FM signals in which the demodulated signal is chopped at twice the pilot frequency for separation between left- and right-channel signals, the demodulated signal is sampled by a first sample-and-hold circuit in response to the output of the noise detector to store that portion of the signal which appeared immediately prior to the occurrence of an impulse noise. The demodulated signal is also sampled by a second sample-and-hold circuit at a frequency twice the pilot frequency to eliminate a noise which might arise due to the chopping of the demodulated signal. A signal is derived from the outputs of the first and second sample-and-hold circuits that indicates the slope ratio of the demodulated signal at the moment that occurred immediately prior to the impulse noise. The slope ratio signal is applied to a linear integrator to generate a compensating voltage which is summed with the signal sampled by the first sample-and-hold circuit at the level which occurred immediately prior to the occurrence of the impulse noise.
摘要翻译：在用于接收立体声FM信号的噪声降低电路中，其中解调信号以两倍于用于分离左声道和右声道信号的导频之间的斩波，解调的信号由第一采样保持电路进行采样到噪声检测器的输出端以存储紧接在脉冲噪声发生之前出现的那部分信号。解调信号也由第二采样保持电路以导频频率的两倍采样，以消除由于解调信号的斩波而可能产生的噪声。来自第一和第二采样保持电路的输出的信号是指示紧接在脉冲噪声之前发生的时刻的解调信号的斜率比。斜率比信号被施加到线性积分器，以产生补偿电压，该补偿电压与由第一采样保持电路采样的信号相加，发生在紧接在脉冲噪声之前发生的电平。

98. 发明授权

US4560838A Apparatus for integrating a plurality of audio systems 失效
标题翻译：用于集成多个音频系统的装置
公开(公告)号：US4560838A
公开(公告)日：1985-12-24
申请号：US572701
申请日：1984-01-20
申请人： William L. Meisenheimer
发明人： William L. Meisenheimer
IPC分类号： H04R3/00 , H03G3/34 , H04M1/60 , G09B5/04 , H04M1/00
CPC分类号： H04M1/6033 , H03G3/348
摘要： An apparatus for integrating a plurality of audio systems, for enabling a selected one of a plurality of audio inputs to be transmitted as an audio output. It is adapted to integrate, for example, a stereo sound system and a telephone sound system, so as to be operable from a control panel adapted to be mounted in the wall of a bathtub or the like.The apparatus is adapted to enable elements of the integrated system to be shared in common by a plurality of audio inputs, so as to generate a selected audio output.The apparatus includes a voltage-controlled amplifier, for controlling the selected audio input signal with a direct-current control voltage. It further includes a plurality of parallel circuits, for generating the direct-current control voltage, one such circuit for each of the plurality of audio inputs, and elements for switching from one such circuit to another.Each such parallel control voltage generating circuit, and the associated audio input signal, are switchable by the switching elements into and out of connection with the voltage-controlled amplifier, in response to the control input signal associated with the selected audio input signal.
摘要翻译：一种用于集成多个音频系统的装置，用于使多个音频输入中的所选择的一个能够作为音频输出发送。其适于集成例如立体声系统和电话音响系统，以便能够从适于安装在浴缸等的控制面板中操作。该装置适于使得集成系统的元件能够由多个音频输入共同共享，以便产生所选择的音频输出。该装置包括用于利用直流控制电压来控制所选择的音频输入信号的压控放大器。它还包括用于产生直流控制电压的多个并联电路，用于多个音频输入中的每一个的一个这样的电路，以及用于从一个这样的电路切换到另一个的元件。响应于与选择的音频输入信号相关联的控制输入信号，每个这样的并行控制电压产生电路和相关联的音频输入信号可由开关元件切换到与压控放大器的连接中。

99. 发明授权

US4532636A Radio communications receivers 失效
标题翻译：无线电通信接收机
公开(公告)号：US4532636A
公开(公告)日：1985-07-30
申请号：US389905
申请日：1982-06-18
申请人： Dent P. Wilkinson
发明人： Dent P. Wilkinson
IPC分类号： H03G3/34 , H04K1/00 , H04B1/10
CPC分类号： H04K1/003 , H03G3/345
摘要： In radio communications receivers for use on frequency hopping radio communications networks, the received signal in each hop period is analyzed and assigned a quality value. If more than one signal is present during the hop period it is determined that more than one network has changed to the same frequency. Similarly if the received signal is out of synchronism it is determined that more than one network has changed to the same frequency. When more than one network has changed to the same frequency, the received signal is not output by the receiver but is replaced by an earlier (or later) received signal.
摘要翻译：在用于跳频无线电通信网络的无线电通信接收机中，分析每个跳跃周期中的接收信号并分配质量值。如果在跳跃期间存在多于一个信号，则确定多于一个网络已经改变为相同的频率。类似地，如果接收的信号不同步，则确定多于一个网络已经改变为相同的频率。当多个网络已经改变为相同的频率时，接收的信号不是由接收机输出的，而是被较早的（或更晚的）接收信号所替代。

100. 发明授权

US4521917A Noise blanking circuit and method 失效
标题翻译：噪声消隐电路及方法
公开(公告)号：US4521917A
公开(公告)日：1985-06-04
申请号：US551401
申请日：1983-11-14
申请人： John R. Holt, Jr.
发明人： John R. Holt, Jr.
IPC分类号： H03G3/34 , H04B1/10
CPC分类号： H03G3/345
摘要： Noise blanking is provided by amplifying, limiting and detecting received signals. The detected signals are compared with a threshold circuit. The leading edge of each detected signal that rises at a rate greater than a selected rate to exceed an amplitude threshold level produces a blanking pulse of selected time duration. Low as well as high level noise signals are blanked. Slow rising information signals are not blanked, and fast rising information signals of high level are blanked initially for the selected time duration, but are not blanked thereafter.
摘要翻译：通过放大，限制和检测接收到的信号来提供噪声消隐。将检测到的信号与阈值电路进行比较。以大于所选择的速率超过振幅阈值电平的速率上升的每个检测信号的前沿产生选定持续时间的消隐脉冲。低和高电平噪声信号都被消隐。缓慢上升的信息信号不被消隐，并且高电平的快速上升信息信号在所选择的持续时间内首先被消隐，但此后不消隐。

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