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81. 发明授权

US4536616A Microphone or mouthpiece signal suppression circuit 失效
标题翻译：麦克风或接口信号抑制电路
公开(公告)号：US4536616A
公开(公告)日：1985-08-20
申请号：US566434
申请日：1983-12-28
申请人： Jean C. Kaire
发明人： Jean C. Kaire
IPC分类号： H04M1/60 , H04M1/58 , H04M1/76
CPC分类号： H04M1/585 , H04M1/76
摘要： The invention relates to a circuit for a telephone set. In order to eliminate the mouthpiece signal between the receiver and the telephone set, there are provided a subtraction means receiving the mouthpiece signal and the composite signal present on the telephone line, one of the two being produced by different compensation impedances, and on the other hand a mixer controlled by a circuit as a function of the telephone line impedance. The two compensation impedances respectively correspond to the compensation of a long line and the compensation of a short line and the output of the mixer supplies a signal mixture, with variable proportions, which effectively suppresses the mouthpiece signal, no matter what the length of the telephone line.
摘要翻译：本发明涉及一种用于电话机的电路。为了消除接收机和电话机之间的接口信号，提供了一种减法装置，其接收接口信号和存在于电话线上的复合信号，其中一个由不同的补偿阻抗产生，另一个由另一个将由电路控制的混频器作为电话线阻抗的函数。两个补偿阻抗分别对应于长线的补偿和短线的补偿，并且混频器的输出提供可变比例的信号混合，这有效地抑制了接口信号，不管电话的长度是多少线。

82. 发明授权

US4515996A Telephone circuit 失效
标题翻译：电话电路
公开(公告)号：US4515996A
公开(公告)日：1985-05-07
申请号：US513941
申请日：1983-07-15
申请人： Kenneth N. Burgin
发明人： Kenneth N. Burgin
IPC分类号： H04M1/60 , H04M1/76
CPC分类号： H04M1/6025 , H04M1/76
摘要： A telephone speech circuit includes an integrated circuit (5) powered by the exchange battery via the subscriber's line. The speech circuit includes an earpiece amplifier (25) and a microphone amplifier (26) whose gains are controlled as a function of the length of the subscriber's line. The voltage on pin 7 which is dependent on the line current and hence the line length is compared with a reference voltage on pin 8 which is derived from the forward voltage drop of a diode connected to pin 8 (FIG. 1). A voltage representative of that on pin 7 is derived from a d.c. level shift circuit (27) and applied to the input of an amplifier (28). The reference voltage on pin 8 is applied to the input of an amplifier (29). The outputs of the amplifiers (28) and (29) are compared in a comparator (30) whose output is coupled to gain control inputs of the amplifier (28), the microphone amplifier (26) and the earpiece amplifier (25).FIG. 2.
摘要翻译：电话语音电路包括通过用户线由交换电池供电的集成电路（5）。语音电路包括耳机放大器（25）和麦克风放大器（26），其增益作为用户线路长度的函数被控制。引脚7上的电压取决于线路电流和线路长度，与引脚8上的参考电压进行比较，该参考电压源自连接到引脚8（图1）的二极管的正向压降。代表针脚7的电压源自直流电源。电平移位电路（27）并施加到放大器（28）的输入端。引脚8上的参考电压施加到放大器（29）的输入端。放大器（28）和（29）的输出在其输出耦合到放大器（28），麦克风放大器（26）和耳机放大器（25）的增益控制输入的比较器（30）中进行比较。图。 2。

83. 发明授权

US4502018A Gain regulation circuit for an amplifier circuit 失效
标题翻译：放大器电路的增益调节电路
公开(公告)号：US4502018A
公开(公告)日：1985-02-26
申请号：US491688
申请日：1983-05-05
申请人： Peter F. Blomley
发明人： Peter F. Blomley
IPC分类号： H04M1/60 , E06B7/10 , H03F3/45 , H03G3/30 , H03G11/00 , H04M1/76
CPC分类号： H03F3/45085 , H03G11/002 , H03G3/3005 , H04M1/76 , E06B2007/026 , H03F2203/45362
摘要： A gain regulation circuit e.g. for a telephone subscriber's instrument, includes a plurality (2n+1) of long tailed transistor pairs one of which has a significantly higher gain than the remainder (2n). The circuit may be adjusted to a composite gain value between limits defined by the high and low gain pairs by providing a suitably weighted combination of these pairs. Typically, this weighting is achieved by control currents fed into the tail circuits of the pairs.
摘要翻译： PCT No.PCT / GB82 / 00070 Sec。 371日期：1983年5月5日 102（e）日期1983年5月5日PCT提交1982年3月4日PCT公布。公开号WO83 / 03177 日期：1983年9月15日。对于电话用户的仪器，包括多个（2n + 1）长尾晶体管对，其中之一具有比余数（2n）显着更高的增益。可以通过提供这些对的适当加权的组合，将电路调整到由高和低增益对限定的极限之间的复合增益值。通常，该加权通过馈送到对的尾部电路中的控制电流来实现。

84. 发明授权

US4146753A Transmit/receive network for telephone-subscriber station 失效
标题翻译：电话用户站的发送/接收网络
公开(公告)号：US4146753A
公开(公告)日：1979-03-27
申请号：US856676
申请日：1977-12-01
申请人： Sebastiano D'Arrigo , Antonio Neri
发明人： Sebastiano D'Arrigo , Antonio Neri
IPC分类号： H04M1/76 , H04M1/58
CPC分类号： H04M1/585
摘要： A receiving amplifier AR and a transmitting amplifier AT at a telephone-subscriber station have operating circuits in respective diagonals A-D and B-C of a bridge circuit whose four impedance arms are formed by two fixed resistances Z.sub.1, Z.sub.2, a variable resistance Z.sub.3 and the resistance Z.sub.4 of a line linking the subscriber station with an associated central office. The variable bridge resistance Z.sub.3 includes a plurality of resistors selectively insertable under the control of a voltage sensor and stabilizer SL connected across the transmitting diagonal B-C which also biases a variable-gain input stage of each amplifier AR, AT to adapt it to the line resistance. A final stage of the transmitting amplifier AT has an input connected via a negative-feedback resistance ZA to one of its output terminals whereby the effective resistance of this amplifier is reduced to a small fraction of the two bridge resistances Z.sub.1, Z.sub.3 in parallel therewith. A microphone M and an earpiece RC, respectively connected to the input of the transmitting amplifier AT and to the output of the receiving amplifier AR, may be constituted by identical electro-acoustic transducers. A tone generator DS, serving for the emission of call-number digits, can be energized from the sensor SL and has an output which blocks the input stage of the transmitting amplifier during such emission.

85. 发明授权

US4085449A Digital modem 失效
标题翻译：数字调制解调器
公开(公告)号：US4085449A
公开(公告)日：1978-04-18
申请号：US744994
申请日：1976-11-26
申请人： Dale M. Walsh , Karl I. Nordling
发明人： Dale M. Walsh , Karl I. Nordling
IPC分类号： H04M11/06 , H04L27/00 , H04L27/36 , H04L27/38 , H04M11/00 , H04J3/12 , H04M1/76
CPC分类号： H04L27/3881 , H04L27/365
摘要： A digital modem comprising a discrete analog/digital converter and digital processor for high-speed digital data transmission by means of analog signals over analog transmission facilities. The analog/digital converter comprises a transmitter section including a digital-to-analog converter and an analog matching interface, and a receiver section including an analog matching interface and analog-to-digital converter. The digital processor comprises a signal processor set, a processor control set and a multiplier/memory set capable of digital manipulation and computation of digitized data signals to accomplish the required encoding, filtering, modulation, demodulation, equalization, decoding and control function.
摘要翻译：一种数字调制解调器，包括用于通过模拟传输设施的模拟信号进行高速数字数据传输的分立模拟/数字转换器和数字处理器。模拟/数字转换器包括包括数模转换器和模拟匹配接口的发射机部分，以及包括模拟匹配接口和模拟 - 数字转换器的接收机部分。数字处理器包括信号处理器组，处理器控制组和能够进行数字操作和计算数字化数据信号以实现所需编码，滤波，调制，解调，均衡，解码和控制功能的乘法器/存储器组。

86. 发明授权

US3916341A R-c feedback oscillator with plural frequency selecting switches producing output signal only when a single switch is closed 失效
标题翻译：具有多个频率选择开关的R-C反馈振荡器仅当单个开关闭合时才产生输出信号
公开(公告)号：US3916341A
公开(公告)日：1975-10-28
申请号：US39275373
申请日：1973-08-29
申请人： PHILIPS CORP
发明人： COOL HANS
IPC分类号： H04M1/76 , H03B1/00 , H03B5/24 , H03B5/26 , H04L27/26 , H04M1/50 , H04Q1/45 , H04Q7/14 , H03B3/04
CPC分类号： H03B5/24 , H03B2201/01 , H04M1/50
摘要： An arrangement for generating signals for selection, in particular for use in telephone subscribers sets. The device comprises a switchable RC- oscillator which is composed of an amplifier with negative feedback and a frequency-dependent voltage divider for positive feedback which comprises resistors, capacitors and switches. The frequency-dependent voltage divider has a configuration such that, if one switch is closed, the attenuation is smaller than the amplification of the amplifier and, if two switches are closed, the attenuation is larger than the amplification.
摘要翻译：用于产生用于选择的信号的装置，特别是用于电话用户组中。该器件包括一个可切换的RC振荡器，由一个负反馈的放大器和一个正向反馈的频率分压器组成，包括电阻，电容和开关。频率相关的分压器具有如下结构：如果一个开关闭合，则衰减小于放大器的放大，并且如果两个开关闭合，则衰减大于放大。

87. 发明授权

US3843844A Subscriber loop circuit apparatus 失效
标题翻译：订户环路电路设备
公开(公告)号：US3843844A
公开(公告)日：1974-10-22
申请号：US22539872
申请日：1972-02-11
申请人： INT STANDARD ELECTRIC CORP
发明人： SCHUMPERLI A
IPC分类号： H04M19/00 , H04Q3/00 , H04M1/76 , H04Q1/30
CPC分类号： H04M19/006 , H04Q3/00
摘要： Circuit apparatus is provided for extending the allowable distance between the subscriber''s loop and the central office. To provide this feature, the circuits sense a subscriber loop line closure to add an increased voltage for the conversation path and improved supervisory signalling. With the increased voltage, the current to the subscriber''s conversation path is maintained at a constant level. Further additional circuits such as a bidirectional voice frequency repeater, pulse correction circuits, and supervisory control circuits operative at the increased voltage may be connected into the conversation path. With reverse battery signalling, the polarity is sensed to activate the current regulation. On a call to the subscriber loop, the ringing signals are bypassed until the call is answered.

88. 发明授权

US3508008A Solid state signal lead extension circuit for telephony 失效
标题翻译：固态信号引线扩展电路
公开(公告)号：US3508008A
公开(公告)日：1970-04-21
申请号：US3508008D
申请日：1967-07-31
申请人： STROMBERG CARLSON CORP
发明人： GARDNER FREDERICK H , MUNN VAUGHN K
IPC分类号： H04Q1/32 , H04M1/76
CPC分类号： H04Q1/32

89. 发明授权

US3350510A Balancing network for telephone subscriber stations 失效
标题翻译：平衡电话用户站网络
公开(公告)号：US3350510A
公开(公告)日：1967-10-31
申请号：US37993764
申请日：1964-07-02
申请人： INT STANDARD ELECTRIC CORP
发明人： ULRICH KNAUER HANS , GERHARD SCHMIDT
IPC分类号： H04M1/74 , H04M1/76
CPC分类号： H04M1/76 , H04M1/74

90. 发明授权

US3056915A Circuit of high alternating current impedance for feeding a constant direct current to a circuit 失效
标题翻译：用于将恒定直流电流馈送到电路的高交流阻抗电路
公开(公告)号：US3056915A
公开(公告)日：1962-10-02
申请号：US75781358
申请日：1958-08-28
申请人： PHILIPS CORP
发明人： DOUWE MEEWEZEN WILLEM
IPC分类号： G05F1/563 , G05F3/20 , G05F3/22 , H04B3/44 , H04M1/76 , H04M19/00 , H04Q3/00
CPC分类号： H04Q3/00 , G05F1/563 , G05F3/20 , G05F3/22 , H04B3/44 , H04M1/76 , H04M19/001 , H04M19/003

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