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31. 发明申请

US20180167041A1 Bias Circuitry For Depletion Mode Amplifiers 审中-公开
公开(公告)号：US20180167041A1
公开(公告)日：2018-06-14
申请号：US15893269
申请日：2018-02-09
申请人： Raytheon Company
发明人： John P. Bettencourt , Alan J. Bielunis , Istvan Rodriguez , Zhaoyang C. Wang
IPC分类号： H03F3/195 , H03F1/30 , H03F3/193 , H03F3/213 , H03F3/72
CPC分类号： H03F3/195 , H03F1/301 , H03F1/303 , H03F3/193 , H03F3/213 , H03F3/72 , H03F2200/18 , H03F2200/258 , H03F2200/27 , H03F2200/451 , H03F2203/7203
摘要： A circuit having an amplifier, comprising: a depletion mode transistor having a source electrode coupled to a reference potential; a drain electrode coupled to a potential more positive than the reference potential; and a gate electrode for coupling to an input signal. The circuit includes a bias circuit, comprising: a current source; and biasing circuitry coupled to the current source and between the potential more positive than the reference potential and a potential more negative than the reference potential. A control circuit is connected to the current source for controlling the amount of current produced by the current source to the biasing circuitry.

32. 发明授权

US09991852B2 System and method for close-down pop reduction 有权
公开(公告)号：US09991852B2
公开(公告)日：2018-06-05
申请号：US15528934
申请日：2015-11-02
申请人： ICEpower a/s
发明人： Kennet Skov Andersen
IPC分类号： H03F1/14 , H03F1/30 , H03F3/183 , H03G3/30 , H03F3/217 , H03F1/02
CPC分类号： H03F1/305 , H03F1/02 , H03F3/183 , H03F3/187 , H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/129 , H03F2200/135 , H03F2200/144 , H03F2200/156 , H03F2200/258 , H03F2200/342 , H03F2200/426 , H03F2200/441 , H03F2200/444 , H03F2200/66 , H03F2200/78 , H03G3/301 , H03G3/348 , H03G2201/106
摘要： A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close-down of audio amplifier assemblies.

33. 发明授权

US09966907B1 Method and apparatus for high-speed clipping and recovery in amplifier circuit 有权
公开(公告)号：US09966907B1
公开(公告)日：2018-05-08
申请号：US15426111
申请日：2017-02-07
申请人： Apple Inc.
发明人： Vahid Majidzadeh Bafar , Ashkan Borna , Mansour Keramat
IPC分类号： H03F1/52 , H03F1/34 , H03F3/45 , H03F3/08
CPC分类号： H03F1/52 , H03F1/34 , H03F3/45475 , H03F2200/258 , H03F2200/411 , H03F2200/66
摘要： A method and apparatus for high-speed clipping and recovery in an amplifier circuit is disclosed. In one embodiment, a circuit includes an amplifier configured to amplify an incoming signal. The amplifier includes inverting and non-inverting inputs, and is configured to provide a differential output. An output limiting circuit is coupled across the differential output, and is configured to limit an amplitude of an output signal provided on the differential output responsive to an input signal exceeding a first amplitude threshold. An input limiting circuit is coupled between the inverting input and the non-inverting input of the amplifier. Responsive to the input signal exceeding a second amplitude threshold (greater than the first), the input limiting circuit is configured to limit the amplitude of the output signal.

34. 发明授权

US09960740B2 Bias circuitry for depletion mode amplifiers 有权
公开(公告)号：US09960740B2
公开(公告)日：2018-05-01
申请号：US15175610
申请日：2016-06-07
申请人： Raytheon Company
发明人： John P. Bettencourt , Alan J. Bielunis , Istvan Rodriguez , Zhaoyang C. Wang
IPC分类号： H03F3/04 , H03F3/195 , H03F3/193 , H03F3/72 , H03F3/213 , H03F1/30
CPC分类号： H03F3/195 , H03F1/301 , H03F1/303 , H03F3/193 , H03F3/213 , H03F3/72 , H03F2200/18 , H03F2200/258 , H03F2200/27 , H03F2200/451 , H03F2203/7203
摘要： A circuit having an amplifier, comprising: a depletion mode transistor having a source electrode coupled to a reference potential; a drain electrode coupled to a potential more positive than the reference potential; and a gate electrode for coupling to an input signal. The circuit includes a bias circuit, comprising: a current source; and biasing circuitry coupled to the current source and between the potential more positive than the reference potential and a potential more negative than the reference potential. A control circuit is connected to the current source for controlling the amount of current produced by the current source to the biasing circuitry.

35. 发明申请

US20170317651A1 A SYSTEM AND METHOD FOR CLOSE-DOWN POP REDUCTION 有权
公开(公告)号：US20170317651A1
公开(公告)日：2017-11-02
申请号：US15528934
申请日：2015-11-02
申请人： ICEpower a/s
发明人： Kennet Skov Andersen
IPC分类号： H03F1/30 , H03F1/02 , H03G3/30 , H03F3/183 , H03F3/217
CPC分类号： H03F1/305 , H03F1/02 , H03F3/183 , H03F3/187 , H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/129 , H03F2200/135 , H03F2200/144 , H03F2200/156 , H03F2200/258 , H03F2200/342 , H03F2200/426 , H03F2200/441 , H03F2200/444 , H03F2200/66 , H03F2200/78 , H03G3/301 , H03G3/348 , H03G2201/106
摘要： A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close-down of audio amplifier assemblies.

36. 发明授权

US09660586B2 Class D switching amplifier and method of controlling a loudspeaker 有权
公开(公告)号：US09660586B2
公开(公告)日：2017-05-23
申请号：US14797934
申请日：2015-07-13
申请人： STMICROELECTRONICS S.R.L.
发明人： Marco Raimondi , Edoardo Botti
IPC分类号： H03F3/217 , H03F1/02 , H03F3/183 , H03F3/21
CPC分类号： H03F3/45932 , H03F1/0205 , H03F3/183 , H03F3/185 , H03F3/211 , H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/129 , H03F2200/171 , H03F2200/258 , H03F2200/351 , H03F2200/78 , H03F2203/21106
摘要： A switching amplifier includes a first half-bridge PWM modulator, a second half-bridge PWM modulator, and at least one amplifier stage configured to receive input signals. The switching amplifier also includes a PWM control stage configured to control switching of the first PWM modulator and of the second PWM modulator as a function of the input signals, by respective first PWM control signals and second PWM control signals. The amplifier stage and the PWM control stage have a fully differential structure.

37. 发明申请

US20170019075A1 RF AMPLIFIER 有权
标题翻译：射频放大器
公开(公告)号：US20170019075A1
公开(公告)日：2017-01-19
申请号：US15209816
申请日：2016-07-14
申请人： NXP B.V.
发明人： Gian Hoogzaad
IPC分类号： H03F1/52 , H03F3/195
CPC分类号： H03F1/52 , H03F3/195 , H03F3/45475 , H03F2200/18 , H03F2200/258 , H03F2200/294 , H03F2200/426 , H03F2200/441 , H03F2200/444 , H03F2200/451 , H03F2200/462 , H03F2200/481 , H03F2200/489 , H03F2200/492 , H03F2200/78
摘要： An RF amplifier comprising an input-transistor having an input-transistor-base terminal, an input-transistor-collector terminal and an input-transistor-emitter terminal; a degeneration-component connected between the input-transistor-emitter terminal and a ground terminal; and a protection-transistor having a protection-transistor-base terminal, a protection-transistor-collector terminal and a protection-transistor-emitter terminal. The input-transistor-base terminal is connected to the protection-transistor-emitter terminal, and the protection-transistor-base terminal is connected to the input-transistor-emitter.
摘要翻译：一种RF放大器，包括具有输入晶体管基极端子的输入晶体管，输入晶体管集电极端子和输入晶体管 - 发射极端子; 连接在输入 - 晶体管 - 发射极端子和接地端子之间的退化分量; 以及具有保护晶体管基极端子的保护晶体管，保护晶体管集电极端子和保护晶体管 - 发射极端子。输入晶体管基极端子连接到保护晶体管 - 发射极端子，保护晶体管基极端子连接到输入晶体管 - 发射极。

38. 发明申请

US20160241200A1 RF AMPLIFICATION DEVICE WITH POWER PROTECTION DURING HIGH SUPPLY VOLTAGE CONDITIONS 有权
标题翻译：在高电压条件下具有电源保护功能的射频放大器件
公开(公告)号：US20160241200A1
公开(公告)日：2016-08-18
申请号：US15140605
申请日：2016-04-28
申请人： RF Micro Devices, Inc.
发明人： Praveen V. Nadimpalli , David Ngo
IPC分类号： H03F1/02 , G05F1/56 , H03K3/354 , H03F3/21 , H03F3/19
CPC分类号： H03F1/0222 , G05F1/561 , H03F1/523 , H03F3/19 , H03F3/21 , H03F2200/258 , H03F2200/408 , H03F2200/451 , H03F2203/21193
摘要： A radio frequency (RF) amplification device comprises an RF amplification circuit, and a dynamic level shifter (DLS) circuit coupled between a supply voltage and the RF amplification circuit. The DLS circuit is configured to provide a first shifted voltage to the RF amplification circuit via a first diode when the supply voltage is above a first threshold voltage level. The DLS circuit is further configured to provide a second shifted voltage to the RF amplification circuit via a first shunt transistor when the supply voltage is below the first threshold voltage level, wherein the supply voltage less the second shifted voltage is less than the supply voltage less the first shifted voltage.
摘要翻译：射频（RF）放大装置包括RF放大电路和耦合在电源电压和RF放大电路之间的动态电平移位器（DLS）电路。 DLS电路被配置为当电源电压高于第一阈值电压电平时，经由第一二极管向RF放大电路提供第一移位电压。 DLS电路还被配置为当电源电压低于第一阈值电压电平时，经由第一分流晶体管向RF放大电路提供第二移位电压，其中小于第二移位电压的电源电压小于电源电压第一个移位电压。

39. 发明申请

US20070001761A1 Differential amplifier and operational amplifier 有权
标题翻译：差分放大器和运算放大器
公开(公告)号：US20070001761A1
公开(公告)日：2007-01-04
申请号：US11518919
申请日：2006-09-12
申请人： Masayuki Ozasa , Akio Yokoyama
发明人： Masayuki Ozasa , Akio Yokoyama
IPC分类号： H03F3/45
CPC分类号： H03F3/211 , H03F3/45183 , H03F3/4521 , H03F3/45475 , H03F3/72 , H03F2200/258 , H03F2200/78 , H03F2203/45138 , H03F2203/45366 , H03F2203/45466 , H03F2203/45506 , H03F2203/45612 , H03F2203/7203 , H03F2203/7236 , H03G1/0088 , H03G3/301
摘要： In a differential amplifier and an operational amplifier each for amplifying a signal, a differential signal composed of first and second signals is inputted to a couple of input terminals (1, 2). When the voltage of the first signal is, e.g., less than the voltage value of a reference voltage source (15), a comparator (13) senses it and a switch circuit (12) switches to a first current source (6) and a current from a third current source (11) flows into the first current source (6) so that a current is inhibited from flowing in the first differential couple (4). As a result, the inputted differential signal is amplified and outputted only through a second differential couple (5). In a situation in which the voltage of the first signal exceeds the voltage of the reference voltage source (15), on the other hand, the switch circuit (12) switches to a current source (7) so that the inputted differential signal is amplified and outputted only through the first differential couple (4). As a result, a gain is equal over the entire range of input operating voltage and a high-speed operation is performed.
摘要翻译：在用于放大信号的差分放大器和运算放大器中，由第一和第二信号组成的差分信号被输入到一对输入端子（1,2）。当第一信号的电压例如小于参考电压源（15）的电压值时，比较器（13）感测它，并且开关电路（12）切换到第一电流源（6）和来自第三电流源（11）的电流流入第一电流源（6），使得电流被禁止在第一差分耦合（4）中流动。结果，输入的差分信号仅通过第二差分耦合（5）被放大和输出。另一方面，在第一信号的电压超过参考电压源（15）的电压的情况下，开关电路（12）切换到电流源（7），使得输入的差分信号被放大并且仅通过第一差分耦合（4）输出。结果，在整个输入工作电压范围内的增益相等，并且执行高速操作。

40. 发明申请

US20060258319A1 Integrated wide bandwidth attenuating-and-amplifying circuit 审中-公开
标题翻译：集成宽带衰减放大电路
公开(公告)号：US20060258319A1
公开(公告)日：2006-11-16
申请号：US11125926
申请日：2005-05-10
申请人： Bernd Wuppermann
发明人： Bernd Wuppermann
IPC分类号： H04B1/28
CPC分类号： H03G1/0088 , H03F3/45085 , H03F3/45183 , H03F3/72 , H03F2200/258 , H03F2200/261 , H03F2200/78 , H03F2203/45504 , H03F2203/45506 , H03K17/60
摘要： An attenuating-and-amplifying circuit and method for producing a voltage-adjusted output signal of an input signal uses a voltage divider and a number of switchable amplifier units connected to the voltage divider to adjust the gain or attenuation of the input signal. The voltage divider includes a number of tapping nodes, which are connected to the switchable amplifier units. The voltage divider is configured to provide different voltage attenuated signals of the input signal. The switchable amplifier units can be selectively activated to adjust with respect to voltage at least one of the different voltage attenuated signals to produce the voltage-adjusted output signal.
摘要翻译：用于产生输入信号的电压调节输出信号的衰减放大电路和方法使用连接到分压器的分压器和多个可切换放大器单元来调节输入信号的增益或衰减。分压器包括多个分接节点，其连接到可切换放大器单元。分压器配置为提供输入信号的不同电压衰减信号。可切换的放大器单元可被选择性地激活，以相对于至少一个不同的电压衰减信号的电压进行调节，以产生经电压调节的输出信号。

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