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128 条记录 (耗时 0.02 秒)

    DYNAMIC CONTROL OF OUTPUT DRIVER IN A SWITCHING AMPLIFIER
    1.
    发明公开
    DYNAMIC CONTROL OF OUTPUT DRIVER IN A SWITCHING AMPLIFIER 审中-公开

    公开(公告)号：EP4290767A1

    公开(公告)日：2023-12-13

    申请号：EP23174610.8

    申请日：2023-05-22

    申请人： Diodes Incorporated

    发明人： ARORA, Rohit ,  KADAM, Dharma R.

    IPC分类号： H03F1/32 ,  H03F3/183 ,  H03F3/217

    摘要： An output driver with slew rate control includes an output transistor that includes a control terminal coupled to a switching input signal, a drain node coupled to the output node for coupling to a load device, and a source node coupled to a reference voltage. The output driver also has a slew control circuit including a current source coupled in series at a connection node with parallelly connected first switch transistor and second switch transistor. The connection node is coupled to the control terminal of the output transistor. The first switch transistor has a control terminal coupled to the switching input signal. The second switch transistor has a control terminal that is coupled to either the switching input signal or a dynamically modulated switching input signal, depending on a current direction at the output node.

    SINGLE-ENDED DIFFERENTIAL TRANSIMPEDANCE AMPLIFIER
    4.
    发明公开
    SINGLE-ENDED DIFFERENTIAL TRANSIMPEDANCE AMPLIFIER 审中-公开

    公开(公告)号：EP3979494A1

    公开(公告)日：2022-04-06

    申请号：EP21200446.9

    申请日：2021-10-01

    申请人： Harman International Industries, Incorporated

    发明人： DANYUK, Dimitri ,  EICHENBAUM, Todd A.

    IPC分类号： H03F3/183 ,  H03F3/45

    摘要： In at least one embodiment, a differential amplifier including first and second current transfer systems, a current difference producing system, and a feedback network circuit is provided. The first current transfer system generates a first differential current signal. The second current transfer system generates a second differential current signal. The current difference producing system receives the first differential current signal and the second differential current signal and generates a voltage difference signal that is indicative of a difference between a first current signal and a second current signal. The feedback network circuit converts the voltage difference signal into at least two converted current signals and provides the at least two converted current signals to one of the first and second current transfer systems or the current difference producing system to minimize the difference between the first current signal and the second current signal.

    CLASS D AMPLIFIER WITH CURRENT MODE CONTROL
    5.
    发明公开
    CLASS D AMPLIFIER WITH CURRENT MODE CONTROL 审中-公开

    公开(公告)号：EP3961921A1

    公开(公告)日：2022-03-02

    申请号：EP21192551.6

    申请日：2021-08-23

    申请人： RGB Systems, Inc.

    发明人： Mendenhall, Eric

    IPC分类号： H03F3/183 ,  H03F3/217

    摘要： An audio amplifier that implements current mode control without the use of an explicit or separate current mode sensor is disclosed. The audio amplifier may include a pair of feedback loops that provide current from a node located before an inductor of an output filter and current from a node located after the inductor of the output filter to an integrator circuit. The integrator circuit may be formed from existing circuitry of the audio amplifier controller. Thus, current mode control can be implemented without a separate current mode sensor.

    METHOD FOR SUPPRESSING HIGH FREQUENCY NOISE IN OUTPUT BY A CLASS D AMPLIFIER AND CLASS D AMPLIFIER
    9.
    发明公开
    METHOD FOR SUPPRESSING HIGH FREQUENCY NOISE IN OUTPUT BY A CLASS D AMPLIFIER AND CLASS D AMPLIFIER 审中-公开

    公开(公告)号：EP3531555A1

    公开(公告)日：2019-08-28

    申请号：EP18158165.3

    申请日：2018-02-22

    申请人： Vestel Elektronik Sanayi ve Ticaret A.S.

    发明人： YILMAZLARl, Ismail

    IPC分类号： H03F1/26 ,  H03F1/34 ,  H03F3/183 ,  H03F3/217

    摘要： There is provided a method for suppressing high frequency noise in signals (65) output by a class-D amplifier (50), the amplifier (50) having a switching circuit (55), and a low-pass filter (60) to filter signals (95) output by the switching circuit (55). The method comprises: passing signals (65) output by the low-pass filter (60) through a high-pass filter (70) configured to pass a high frequency noise signal (80); attenuating and inverting (75) the high frequency noise signal (80) according to a gain of the amplifier (50); and mixing the attenuated and inverted noise signal with a received audio signal, thereby to input a mixed signal (90) to the amplifier (50). The amplifier (50) amplifies the mixed signal (90) such that the amplified inverted noise signal combines with a high frequency noise signal generated by the switching circuit (55) to result in an output of the switching circuit (55) with reduced high frequency noise.