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61. 发明授权

US5915030A Electric muting circuit 失效
标题翻译：电静电电路
公开(公告)号：US5915030A
公开(公告)日：1999-06-22
申请号：US900324
申请日：1997-07-25
申请人： Michael Viebach
发明人： Michael Viebach
IPC分类号： H03G3/34 , H03H11/24 , H04H20/26 , H04H40/45 , H04B15/00
CPC分类号： H04H40/45 , H03G3/341 , H03H11/245 , H04H20/26 , H04H2201/13
摘要： An electric muting circuit for soft muting of an audio signal is shown. It comprises a digitally controllable attenuation circuit having an audio signal input, an audio signal output and a control signal input and also comprises an up/down counter having a clock pulse input fed with clock pulses to be counted, a counting control input fed with a counting control signal controlling counting start and counting stop, and a count signal output from which a digital count signal is available and which a digital count signal input of the attenuation circuit.
摘要翻译：示出了用于音频信号的软静音的电静音电路。它包括具有音频信号输入，音频信号输出和控制信号输入的数字可控衰减电路，并且还包括具有馈送有要计数的时钟脉冲的时钟脉冲输入的上/下计数器，馈送有计数控制信号控制计数开始和计数停止，以及数字计数信号可用的计数信号输出以及衰减电路的数字计数信号输入。

62. 发明授权

US5825251A Audio signal amplifying circuit 失效
标题翻译：音频信号放大电路
公开(公告)号：US5825251A
公开(公告)日：1998-10-20
申请号：US759952
申请日：1996-12-03
申请人： Eiji Nakagawa
发明人： Eiji Nakagawa
IPC分类号： H03F1/00 , H03F3/21 , H03F3/72 , H03G3/34 , H03F1/14 , H04B15/00
CPC分类号： H03F1/305 , H03F3/72 , H03G3/348
摘要： An audio signal amplifying circuit includes a switch circuit disposed between a first power source line and a second power source line for bootstrapping, and a capacitor for bootstrapping disposed between the second power source line and a line to which an output terminal is connected. The switch circuit is controlled from ON to OFF upon receiving a muting signal, and is provided with a first switch circuit constituted by Darlington connected transistors having an NPN type transistor as the output stage thereof and a second switch circuit constituted by a PNP type transistor disposed in parallel with the NPN type transistor. The sum of the rated current values of the NPN type transistor in the first switch circuit and the rated current value of the PNP type transistor in the second switch circuit is selected to be equal to or more than the maximum supply current value for the second power source line, and the rated current of the PNP type transistor in the second switch circuit is selected to be smaller than the rated current values of the transistors in the first switch circuit.
摘要翻译：音频信号放大电路包括设置在第一电源线和用于自举的第二电源线之间的开关电路，以及设置在第二电源线与输出端子连接的线路之间的自举电容器。开关电路在接收到静噪信号时由ON变为OFF，并且具有由具有NPN型晶体管作为其输出级的Darlington连接的晶体管构成的第一开关电路和由配置在PNP型晶体管上的PNP型晶体管构成的第二开关电路与NPN型晶体管并联。选择第一开关电路中的NPN型晶体管的额定电流值与第二开关电路中的PNP型晶体管的额定电流值之和等于或大于第二功率的最大供给电流值源极线，并且第二开关电路中的PNP型晶体管的额定电流被选择为小于第一开关电路中的晶体管的额定电流值。

63. 发明授权

US5798959A Method and device for soft-driving an array of logic gates and suppression of switching distortion 失效
标题翻译：用于软驱动逻辑门阵列和抑制开关失真的方法和装置
公开(公告)号：US5798959A
公开(公告)日：1998-08-25
申请号：US680393
申请日：1996-07-15
申请人： Andrea Mario Onetti , Sylvia Procurato
发明人： Andrea Mario Onetti , Sylvia Procurato
IPC分类号： H03M1/08 , H03G3/00 , H03G3/34 , H03K17/16 , H03K17/693 , H03K19/003 , H03K19/0175 , H03K19/173
CPC分类号： H03K17/16 , H03G3/001 , H03G3/348 , H03H7/25 , H03K17/163 , H03K19/00361
摘要： Switching distortion in a digitally controlled attenuator is effectively suppressed and soft-switching in passgate arrays, present at a certain point of a logic signal path, is implemented with a minimum number of additional components. The soft switching in passgate arrays is implemented by driving the control nodes of each passgate by an inverter, at least a current terminal of which is made switchable from the respective supply node to a node onto which an appropriate ramp signal toward the potential of the respective supply potential is produced by a suitable controlled ramp generator. The passgates for switching the current terminals of the inverters are controlled by the logic signal that preexisted the intervening switching on the respective signal line of the passgate, and by its inverse. The preexistent logic value is momentarily stored in a latch that is updated at the end of any new switching process. The switching distortion is suppressed by causing a fast turn-on of the selected switch and a slowed-down turn-off of the deselected switch and by connecting in parallel to the portion of the resistive voltage divider pertaining to the change of output tap a shunt resistance, deselected from the signal path downstream of the selected switch. The deselected switch is driven by a ramp of a preset slope. A circuit sensing the sign of the change of attenuation of the contingent command, configures a pair of switches that deselect the shunt resistance.
摘要翻译：数字控制的衰减器中的开关失真被有效地抑制，存在于逻辑信号路径的某一点处的通道阵列中的软开关以最小数量的附加组件来实现。通过门阵列中的软切换通过由逆变器驱动每个通道的控制节点来实现，该逆变器的至少当前端可从相应的电源节点切换到节点，在该节点上施加相应的斜坡信号供应电位由合适的受控斜坡发生器产生。用于切换逆变器的电流端子的通孔由预先通过闸门的相应信号线上的插入开关的逻辑信号及其相反来控制。预先存在的逻辑值被暂时存储在任何新的切换过程结束时被更新的锁存器中。通过使所选开关的快速接通和取消选择的开关的减速关断并且并联连接到电阻分压器的与输出抽头变化相关的部分分流来分流来抑制开关失真电阻，从选定开关下游的信号路径中取消选择。取消选择的开关由预设斜率的斜坡驱动。感测到偶然命令的衰减变化的符号的电路配置了一对取消选择分流电阻的开关。

64. 发明授权

US5794136A Noise blanker and a radio receiver and method employing same 失效
标题翻译：噪声抑制器和无线电接收机以及使用它的方法
公开(公告)号：US5794136A
公开(公告)日：1998-08-11
申请号：US710890
申请日：1996-09-24
申请人： Gregory J. Buchwald , Lawrence M. Ecklund , Roy H. Espe
发明人： Gregory J. Buchwald , Lawrence M. Ecklund , Roy H. Espe
IPC分类号： H03G3/34 , H04B1/16
CPC分类号： H03G3/345
摘要： A noise blanker (400) suitable for use with a radio receiver (500) having a track and hold unit (509) includes an impulse noise detector (401), a low pass filter (404) that is coupled to the impulse noise detector, and a first amplitude threshold detector (406) that is coupled to the output of the low pass filter and to the input of the track and hold unit. In one embodiment, this noise blanker is configured in conjunction with a radio receiver to yield a radio receiver that substantially minimizes the impact of noise impulses on resulting processed audio. In one embodiment, a second amplitude threshold detector (512) and a repetition rate threshold detector (513) are additionally utilized to allow gating of the internal signal processing paths of the radio receiver in conjunction with operation of the track and hold unit.
摘要翻译：适用于具有跟踪和保持单元（509）的无线电接收机（500）的噪声抑制器（400）包括脉冲噪声检测器（401），耦合到脉冲噪声检测器的低通滤波器（404）以及第一幅度阈值检测器（406），其耦合到所述低通滤波器的输出和所述轨道和保持单元的输入。在一个实施例中，该噪声消除器被配置为与无线电接收器结合，以产生基本上最小化噪声脉冲对所产生的处理音频的影响的无线电接收机。在一个实施例中，另外利用第二幅度阈值检测器（512）和重复率阈值检测器（513）来结合轨道和保持单元的操作来允许无线电接收机的内部信号处理路径的门控。

65. 发明授权

US5784241A Electromagnetic-noise protection circuit 失效
标题翻译：电磁噪声保护电路
公开(公告)号：US5784241A
公开(公告)日：1998-07-21
申请号：US705242
申请日：1996-08-30
申请人： Gaute Munch , Jimmi Hansen
发明人： Gaute Munch , Jimmi Hansen
IPC分类号： H03K19/003 , H03G3/32 , H03G3/34 , H03K17/955 , H03K19/00 , H04B15/00 , H02H3/22
CPC分类号： H03K17/955 , H03G3/32 , H03G3/345
摘要： An electromagnetic-noise protection circuit for protecting an electrical device, which processes wanted signals, comprises a sensor which senses the presence of ambient electromagnetic noise from which the electrical device is to be protected, and a filter coupled to the sensor and intermitting the operation of the electrical device in time periods during which the sensor senses the presence of the ambient electromagnetic noise. The sensor can include a discriminator which discriminates wanted signals affected by ambient electromagnetic noise from wanted signals not affected by ambient electromagnetic noise. The discriminator can be implemented as a window comparator comprising at least three triggers and a logical gate and producing a logic output signal indicating if the input signal is either below a certain lower threshold or beyond a certain upper threshold.
摘要翻译：用于保护处理有用信号的电气设备的电磁噪声保护电路包括一个传感器，该传感器检测电气设备将被保护的环境电磁噪声的存在，以及耦合到传感器的滤波器，电气设备在传感器感测环境电磁噪声的存在的时间段内。传感器可以包括鉴别器，其鉴别受环境电磁噪声影响的有用信号不受环境电磁噪声影响的有用信号。鉴别器可以被实现为包括至少三个触发器和逻辑门的窗口比较器，并且产生指示输入信号是低于某一下阈值还是超过某一上限阈值的逻辑输出信号。

66. 发明授权

US5675614A Digital squelch circuit 失效
标题翻译：数字静噪电路
公开(公告)号：US5675614A
公开(公告)日：1997-10-07
申请号：US522891
申请日：1995-09-01
申请人： John D. Wetters
发明人： John D. Wetters
IPC分类号： H03G3/34 , H04B1/10
CPC分类号： H03G3/344
摘要： A digital squelch system (100) includes a timing signal generator (102) for generating a reference window. An edge detector (106) detects edges in the input signal during this reference window. An accumulator (110) accumulates the number of coherencies. An overflow detector (112) coupled to the accumulator (110) detects overflow conditions therein. A latch coupled to the overflow detector (112) squelches and unsquelches the radio (200) when the overflow or underflow conditions have been detected, respectively.
摘要翻译：数字静噪系统（100）包括用于产生参考窗口的定时信号发生器（102）。边缘检测器（106）在该参考窗口期间检测输入信号中的边缘。累加器（110）累积货币数量。耦合到蓄电池（110）的溢流检测器（112）检测其中的溢流状况。耦合到溢出检测器（112）的锁存器分别在已经检测到溢出或下溢条件时，对无线电装置（200）进行静噪和取消锁定。

67. 发明授权

US5664022A Noise gate control circuitry for electronic systems 失效
标题翻译：用于电子系统的噪声门控制电路
公开(公告)号：US5664022A
公开(公告)日：1997-09-02
申请号：US178099
申请日：1994-01-06
申请人： David Fiori, Jr.
发明人： David Fiori, Jr.
IPC分类号： H03F1/30 , H03G3/34 , G01R31/02
CPC分类号： H03F1/305 , H03G3/345
摘要： Noise gate control circuitry eliminates in audio systems the effects of spurious signals on a transducer of a speaker. The noise gate control circuitry coordinates the electronic switching of the transducer to power sources in accordance with a remote turn on control signal, and coordinates this action with the application of power to power sources and signal processing circuitry via remote turn on provisions. The noise gate control circuitry senses and responds to the signals and rapidly connects and disconnects the transducer when the signal level drops to a level too low to be of any good effect. The effect of signal level on delays is removed to provide for suppressing undesirable changes in response.
摘要翻译：噪声门控制电路在音频系统中消除了杂散信号对扬声器传感器的影响。噪声门控制电路根据远程开启控制信号来协调传感器的电子切换到电源，并通过远程开启规定对电源和信号处理电路施加电力来协调此动作。噪声门控制电路检测并响应信号，当信号电平下降到不太好的效果时，可快速连接和断开换能器。信号电平对延迟的影响被消除以提供抑制不良响应的变化。

68. 发明授权

US5586192A Method of and device for detecting pulsatory interference signals in a sound signal 失效
标题翻译：用于检测声音信号中的脉动干扰信号的方法和装置
公开(公告)号：US5586192A
公开(公告)日：1996-12-17
申请号：US599283
申请日：1996-02-09
申请人： Mario J. De Bijl , Franciscus J. A. M. Sessink
发明人： Mario J. De Bijl , Franciscus J. A. M. Sessink
IPC分类号： H04B1/10 , H03G3/34 , H04B14/04 , H04H20/88 , H04B15/00
CPC分类号： H03G3/345
摘要： For detecting pulsatory interference in a sampled audio signal, the value of a given signal sample is compared with the values of previous as well as subsequent signal samples within a selected time window. If the given sample, multiplied by a selected attenuation factor, exceeds a certain percentage of all such samples, that identifies it as an interference pulse. It can then be replaced by an interpolated sample value derived from adjoining samples over a selected interval of the signal.
摘要翻译：为了检测采样音频信号中的脉动干扰，将给定信号样本的值与选定时间窗口内的先前值以及后续信号采样值进行比较。如果给定的采样乘以所选择的衰减因子，则超过所有这些采样的一定百分比，将其标识为干扰脉冲。然后可以在信号的选定间隔内由相邻采样导出的内插采样值替换。

69. 发明授权

US5583891A Noise attenuation circuit for amplitude modulated radio and method therefor 失效
标题翻译：用于调幅无线电的噪声衰减电路及其方法
公开(公告)号：US5583891A
公开(公告)日：1996-12-10
申请号：US332171
申请日：1994-10-31
申请人： Roy H. Espe , Richard Potyka
发明人： Roy H. Espe , Richard Potyka
IPC分类号： H03G3/34 , H04B1/10 , H03D1/06 , H04B7/10
CPC分类号： H04B1/1027 , H03G3/345
摘要： A noise attenuation circuit (43) is provided for reducing noise in an RF stage of an AM radio receiver. A RF amplifier (44) amplifies an RF signal with amplitude modulated audio information from the signal path of an AM receiver. An AM detector (46) receives the amplified RF signal and removes the audio information. A high-pass filter (47) filters out a majority of the audio information. A noise pulse couples through the hi-pass filter (47) which is detected by a pulse detector (48) when above a predetermined threshold voltage. The pulse detector (48) enables an RF timer (49) for generating a pulse of a predetermined width. The RF timer enables a RF attenuator (51) for attenuating the RF signal in the signal path of the AM receiver. The RF attenuator (51) attenuates an average noise pulse to a level approximately equal to the magnitude of an unmodulated RF signal.
摘要翻译：提供了一种用于降低AM无线电接收机的RF级中的噪声的噪声衰减电路（43）。 RF放大器（44）从AM接收机的信号路径放大具有调幅音频信息的RF信号。 AM检测器（46）接收放大的RF信号并去除音频信息。高通滤波器（47）滤除大部分音频信息。当高于预定阈值电压时，噪声脉冲通过脉冲检测器（48）检测的高通滤波器（47）耦合。脉冲检测器（48）使得RF定时器（49）能够产生预定宽度的脉冲。 RF定时器使得能够衰减AM接收机的信号路径中的RF信号的RF衰减器（51）。 RF衰减器（51）将平均噪声脉冲衰减到大致等于未调制的RF信号的幅度的电平。

70. 发明授权

US5575002A Method for muting a radio 失效
标题翻译：静音无线电的方法
公开(公告)号：US5575002A
公开(公告)日：1996-11-12
申请号：US332213
申请日：1994-10-31
申请人： Keith I. Mulford
发明人： Keith I. Mulford
IPC分类号： H03G3/34 , H04B1/16
CPC分类号： H03G3/34
摘要： When a portable radio (110) receives a transmission from a mobile radio (105), the portable radio (110) mutes a speaker volume of the portable radio (110) for a duration of the transmission from the mobile radio (105). In an arrangement of the mobile radio (105) and the portable radio (110) where both radios transmit and receive on a same communication resource channel and both radios are in close proximity, acoustic feedback may be avoided.
摘要翻译：当便携式无线电设备（110）从移动无线电设备（105）接收到传输时，便携式无线电设备（110）在便携式无线电设备（110）的扬声器音量的静止期间从移动无线电设备（105）发送的持续时间。在移动无线电（105）和便携式无线电（110）的布置中，其中两个无线电在相同的通信资源信道上发射和接收两个无线电接近，可以避免声反馈。

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