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31. 发明公开

EP3813254A1 VERSTÄRKERSCHALTUNG MIT VARIABLER STROMQUELLE 有权转让
公开(公告)号：EP3813254A1
公开(公告)日：2021-04-28
申请号：EP20000378.8
申请日：2020-10-20
申请人： Avantgarde Acoustic
发明人： Ruff, Matthias
IPC分类号： H03F1/32 , H03F3/183 , H03F3/45
摘要： Die Erfindung betrifft eine Verstärkerschaltung (1) zum Betreiben eines Lautsprechers (16), umfassend zwei Eintaktverstärkerschaltungen (2a, 2b), die jeweils einen Eingang (4a, 4b) und einen Ausgang (13a, 13b) sowie ein Verstärkerelement (6a, 6b) und eine Konstantstromquelle (15a, 15b) aufweisen, wobei vorgesehen ist, dass an mindestens einem Eingang (4a, 4b) ein Wechselspannungssignale angelegt wird, und dass der Lautsprecher (16) zwischen den Ausgängen (13a, 13b) angeordnet wird. Um eine solche Verstärkerschaltung gegenüber dem bekannten Stand der Technik zu verbessern, wobei insbesondere für den Betrieb von hocheffizienten Hornlautsprechern auf den Einsatz von Gegenkopplungen verzichtet werden soll, wird vorgeschlagen, dass die Verstärkerelemente (6a, 6b) jeweils eine variable Stromquelle (10a, 10b) steuern, so dass das eingehende Wechselspannungssignal in ein Stromsignal übersetzt wird, wobei an den Ausgängen (13a, 13b) ein Ausgangsstrom erzeugt wird. Ferner betrifft die Erfindung auch einen Audioverstärker (26) mit einer erfindungsgemäßen Verstärkerschaltung (1).

32. 发明授权

EP3506498B1 INCREASED AUDIO POWER OUTPUT AMPLIFIER CONFIGURATION INCLUDING FAULT TOLERANCE SUITABLE FOR USE IN ALARM SYSTEM 有权
公开(公告)号：EP3506498B1
公开(公告)日：2021-03-17
申请号：EP17211207.0
申请日：2017-12-29
发明人： RATCLIFFE, Ashley Phillip
IPC分类号： H03F1/52 , H03F3/183 , H03F3/217

33. 发明公开

EP3698470A1 CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM 有权
公开(公告)号：EP3698470A1
公开(公告)日：2020-08-26
申请号：EP18792774.4
申请日：2018-10-03
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： DAS, Tejasvi , MORTON, Alan Mark , ZHAO, Xin , ZHU, Lei , FEI, Xiaofan , GABORIAU, Johann G. , MELANSON, John L. , VELLANKI, Amar
IPC分类号： H03F3/183 , H03F3/217

35. 发明授权

EP3110004B1 AUDIO SIGNAL AMPLIFICATION APPARATUS 有权
公开(公告)号：EP3110004B1
公开(公告)日：2018-06-27
申请号：EP14883059.9
申请日：2014-11-26
申请人： Panasonic Intellectual Property Management Co., Ltd.
发明人： IWATA, Kazuya
IPC分类号： H03F3/217 , H03F1/32 , G10L21/0208 , H03F1/34 , H03F3/181 , H04R3/04 , H03F3/183
CPC分类号： H04R3/04 , G10L21/0208 , H03F1/34 , H03F3/183 , H03F3/217 , H03F3/2171 , H03F3/2173 , H03F3/2175 , H03F2200/03 , H03F2200/171 , H03F2200/331 , H03F2200/351 , H03F2200/432
摘要： An audio signal amplification device of the disclosure includes: a delta-sigma modulation part configured to resample an input digital audio signal with a quantization number smaller than a quantization number of the digital audio signal; a pulse-width modulation part configured to convert an output signal from the delta-sigma modulation part into a pulse-width modulation signal which sets a gradation of the output signal in an amplitude direction at a gradation of a pulse width; a power amplification part configured to perform power amplification on an output signal from the pulse-width modulation part; a low-pass filter configured to diminish a component higher than a predetermined cutoff frequency, in an output signal from the power amplification part, and to output the resultant signal; and a correction processing part configured to generate a correction signal for correcting the digital audio signal. The correction processing part includes a switch configured to control coupling of the correction processing part to the low-pass filter. When the switch is on, the correction processing part couples a loudspeaker to the low-pass filter, and generates the correction signal.

36. 发明授权

EP3143776B1 MICROPHONE ASSEMBLY AND METHOD OF MANUFACTURING A MICROPHONE ASSEMBLY 有权转让
标题翻译：麦克风组件和制造麦克风组件的方法
公开(公告)号：EP3143776B1
公开(公告)日：2018-03-07
申请号：EP14724069.1
申请日：2014-05-12
申请人： TDK Corporation
发明人： ROCCA, Gino
IPC分类号： H04R19/00 , H04R19/01 , H04R1/04 , H03G3/30 , H04R19/04 , H03F3/183 , H03F3/45
CPC分类号： H04R1/04 , H03F3/183 , H03F3/45071 , H03F2200/03 , H03F2200/267 , H03G3/3005 , H04R19/005 , H04R19/04 , H04R2201/003
摘要： A microphone assembly and a method for manufacturing a microphone assembly are disclosed. In an embodiment, the microphone assembly includes a MEMS dual backplate microphone configured to provide a differential output signal, an ASIC including a differential amplifier configured to receive the differential output signal and a control element configured to adjust at least one of a setting of the MEMS dual backplate microphone and a setting of the ASIC.

37. 发明公开

EP2541765A1 Low-noise microphone pre-amplifier with active load element 审中-公开
标题翻译： Mikrofon-Vorverstärkermit geringem Rauschen und aktivem Lastelement
公开(公告)号：EP2541765A1
公开(公告)日：2013-01-02
申请号：EP11172287.2
申请日：2011-06-30
申请人： Research In Motion Limited
发明人： Poulsen, Jens Kristian
IPC分类号： H03F3/183 , H03F1/30 , H03F1/32 , H04R3/00 , H04R19/01
CPC分类号： H03F1/304 , H03F1/301 , H03F1/3205 , H03F3/183 , H03F2200/03 , H03F2200/15 , H03F2200/321 , H03F2200/78
摘要： A low-noise pre-amplifier with an active load element is integrated into a microphone. The microphone has an acoustic sensor (252) coupled to the intrinsic pre-amplifier (254). A controllable current source (302) is coupled to the intrinsic pre-amplifier (254) and supplies a pre-amplifier bias current (262). A current source controller (304) is coupled to the current source (302) and controls the amplitude of the pre-amplifier bias current (262) to maintain the intrinsic pre-amplifier (254) at a bias point at which the intrinsic pre-amplifier (254) amplifies microphone signals (258) produced by the acoustic sensor (252). The intrinsic pre-amplifier (254) may be actively regulated at the pre-determined bias point using negative feedback (308). Alternatively, the intrinsic pre-amplifier may be set to the pre-determined bias point by sweeping the pre-amplifier bias current for the intrinsic pre-amplifier over a range of currents. Use of an active load element with the intrinsic pre-amplifier results in lower noise, lower supply current, increased power supply suppression ratio and reduced signal post-processing.
摘要翻译：具有有源负载元件的低噪声前置放大器集成到麦克风中。麦克风具有耦合到本征前置放大器（254）的声学传感器（252）。可控电流源（302）耦合到本征前置放大器（254）并提供前置放大器偏置电流（262）。电流源控制器（304）耦合到电流源（302）并且控制前置放大器偏置电流（262）的振幅，以将本征前置放大器（254）保持在偏置点处，在该偏置点处，放大器（254）放大由声学传感器（252）产生的麦克风信号（258）。内部前置放大器（254）可以使用负反馈（308）在预定的偏置点处被主动地调节。或者，通过在一定范围的电流上扫过本征前置放大器的前置放大器偏置电流，可以将本征前置放大器设置为预定的偏置点。使用内置前置放大器的有源负载元件可以降低噪声，降低电源电流，提高电源抑制比和降低信号后处理。

38. 发明公开

EP2532090A1 METHOD AND ARRANGEMENT FOR DRIVING A MICROPHONE 有权
标题翻译：方法和一种控制麦克风
公开(公告)号：EP2532090A1
公开(公告)日：2012-12-12
申请号：EP10845362.2
申请日：2010-09-13
申请人： Research Electronics Leksand AB
发明人： ERIKSSON, Sven-Äke
IPC分类号： H03F3/183 , H03F3/45 , H03F1/56 , H04R19/04
CPC分类号： H03F3/183 , H03F3/45076 , H03F2200/534 , H03F2203/45228
摘要： Disclosed is a differential microphone pre-amplifier circuit (120) for providing an amplified differential signal at a first (A) and a second (B) output terminal of the microphone pre- amplifier (120), including a first voltage controlled current generator (101), a second voltage controlled current generator (102) and a third voltage controlled current generator (103) all being configured to receive, amplify and convert a voltage signal generated by an associated microphone (110) to a current signal output.

39. 发明公开

EP0425745A1 Signal conditioner system for musical instruments 失效
标题翻译： SignalaufmachungssystemfürMusikinstrumente。
公开(公告)号：EP0425745A1
公开(公告)日：1991-05-08
申请号：EP89311434.8
申请日：1989-11-03
申请人： Tracy, Daniel L.
发明人： Tracy, Daniel L.
IPC分类号： G10H3/18 , G10H1/12 , H03F3/183
CPC分类号： H03G9/025 , G10H1/12 , G10H3/186 , H03F3/183 , H03G3/348 , H03G5/22
摘要： An audio signal conditioning system is described comprising a power supply (30) for providing a direct current having a predetermined voltage; an input gain control device (36) for receiving the audio sound output signals and for controlling gain; a first transistor amplifier (32) connected to the input gain control (36), the first transistor (32) providing a first amplified output signal from the collector thereof; a second transistor amplifier (34) connected to the first transistor amplifier (32) for receiving amplified signals from the first transistor amplifier (32) and providing a second amplified output signal from the collector thereof; a negative feedback circuit (38) between the first transistor amplifier (32) and the second transistor amplifier (34) for transmitting negative feedback signals from the emitter of the second transistor amplifier (34) to the base of the first transistor amplifier (32); and a regenerative feedback circuit (40) and an associated tone control circuit (42) between the first transistor amplifier (32) and the second transistor amplifier (34) for transmitting regenerative feedback signals from the collector of the second transistor amplifier (34) to the base of the first transistor amplifier (32).
摘要翻译：描述了一种音频信号调理系统，其包括用于提供具有预定电压的直流电的电源（30）输入增益控制装置（36），用于接收音频声音输出信号并用于控制增益; 连接到输入增益控制（36）的第一晶体管放大器（32），第一晶体管（32）从其集电极提供第一放大的输出信号; 连接到第一晶体管放大器（32）的第二晶体管放大器（34），用于接收来自第一晶体管放大器（32）的放大信号，并从其集电极提供第二放大输出信号; 在第一晶体管放大器（32）和第二晶体管放大器（34）之间的负反馈电路（38）用于将负反馈信号从第二晶体管放大器（34）的发射极传送到第一晶体管放大器（32）的基极， ; 以及在第一晶体管放大器（32）和第二晶体管放大器（34）之间的再生反馈电路（40）和相关联的音调控制电路（42），用于将来自第二晶体管放大器（34）的集电极的再生反馈信号传输到第一晶体管放大器（32）的基极。

40. 发明公开

EP0362219A4 ASYMMETRICAL DUAL INPUT AMPLIFIER. 失效
标题翻译：带双输入的不对称放大器。
公开(公告)号：EP0362219A4
公开(公告)日：1990-06-26
申请号：EP88903718
申请日：1988-04-08
申请人： JOHNSON WILLIAM A
发明人： JOHNSON WILLIAM A
IPC分类号： H03F1/30 , H03F3/183 , H04R25/00
CPC分类号： H03F1/302 , H03F3/183 , H04R25/00

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