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11 条记录 (耗时 0.01 秒)

    VACUUM TUBE AMPLIFICATION SYSTEM CAPABLE OF REDUCING RESIDUAL NOISE AND A GROUNDING METHOD THEREOF
    6.
    发明公开
    VACUUM TUBE AMPLIFICATION SYSTEM CAPABLE OF REDUCING RESIDUAL NOISE AND A GROUNDING METHOD THEREOF 审中-公开

    公开(公告)号：EP3920415A1

    公开(公告)日：2021-12-08

    申请号：EP20202167.1

    申请日：2020-10-16

    申请人： Echowell Electronic Co., Ltd.

    发明人： Chen, Hsi-Hsien

    IPC分类号： H03F1/28 ,  H03F3/02 ,  H03F3/181 ,  H03F3/68

    摘要： A vacuum tube amplification system includes: a first power circuit electrically connected to utility power alternating voltage to transform it into a first DC voltage; a first vacuum tube amplification load circuit having a first grounding end, the first vacuum tube amplification load circuit using the first DC voltage as operating voltage; a second power circuit electrically connected to the utility power alternating voltage to transform it into a second DC voltage and output the second DC voltage; and a second vacuum tube amplification load circuit having a second grounding end, the second vacuum tube amplification load circuit using the second DC voltage as operating voltage. The first grounding end is not directly electrically connected to the second grounding end, the first grounding end and the second grounding end are each electrically connected to a compliance ground of the utility power alternating voltage through a jumper-wire zero-ohm resistor.

    Methods and apparatus for switching between class A and A/B operation in a power amplifier
    8.
    发明公开
    Methods and apparatus for switching between class A and A/B operation in a power amplifier 有权
    类之间切换的功率放大器的操作和A / B类操作的方法和装置

    公开(公告)号：EP1777814A2

    公开(公告)日：2007-04-25

    申请号：EP06076871.0

    申请日：2006-10-12

    申请人： Peavey Electronics Corporation

    发明人： Fields, John Calvin ,  Peavey, Hartley D.

    IPC分类号： H03F3/26 ,  H03F3/28 ,  H03F3/30 ,  H03F3/181 ,  H03F3/02 ,  H03F3/20

    CPC分类号： H03F3/26 ,  H03F1/0261 ,  H03F3/02 ,  H03F3/181 ,  H03F3/20 ,  H03F3/211 ,  H03F3/28 ,  H03F3/30 ,  H03F2200/27 ,  H03F2200/421 ,  H03F2200/541 ,  H03F2203/21145

    摘要： Method and apparatus contemplate: an output transformer (T108) having at least first (112A) and second (112B) separate primary windings and at least one secondary winding (114), each winding including a first (in phase) end and a second (out of phase) end; at least first and second active elements (104A,104B), each having at least a pair of power terminals and a control terminal, one power terminal of each active element being coupled to a common node; and a switching circuit (106) operable to change a circuit configuration of the first and second primary windings and the active elements between a class A mode and a class A/B mode.

    摘要翻译： 方法和装置，设想了：具有至少第一（112A）的输出变压器（T108）和第二（112B），单独的初级绕组和至少一个次级绕组（114），每个绕组包括第一（（同相）端部和第二 出相位）端的; 至少第一和第二有源元件（104A，104B），每一个具有至少一对电源端子和控制端子，被耦合到公共节点的每个有源元件的一个电源端子; 和开关电路（106），可操作以改变所述第一和第二初级绕组和一类A模式和A / B类模式之间的有源元件的电路结构。

    POWER SUPPLY APPARATUS AND METHOD FOR POWER AMPLIFIER
    9.
    发明公开
    POWER SUPPLY APPARATUS AND METHOD FOR POWER AMPLIFIER 审中-公开

    公开(公告)号：EP3826173A1

    公开(公告)日：2021-05-26

    申请号：EP19837408.4

    申请日：2019-07-19

    申请人： ZTE Corporation

    发明人： LI, Xiangfeng ,  LI, Changlang ,  ZENG, Jixiang ,  LIU, Zhong ,  SUN, Wenchang ,  XIAO, Huanqing ,  ZHANG, Jinchao

    IPC分类号： H03F3/02 ,  H03F3/20

    摘要： A power supply apparatus and method for a power amplifier are disclosed. The power supply apparatus includes: a redundant circuit configured to supply an input voltage to a power-off holding circuit after performing redundancy on an output voltage of a first power circuit and an output voltage of a second power circuit, and to supply an input voltage to a gate voltage circuit after performing redundancy on the output voltage of the first power circuit and an output voltage of the power-off holding circuit; a power-off holding circuit configured to provide power-off energy holding and power-off delay to a gate voltage output by the gate voltage circuit; a detection and control circuit configured to inspect the power-off holding circuit during a power-on process, to detect a voltage of the power-off holding circuit and a voltage of the gate voltage circuit during a normal operation and a power-off process, and to realize, by enable control of an enable circuit, where a detection result satisfies a judgment condition, that power-on of the gate voltage is earlier than power-on of a drain voltage and that power-off of the gate voltage is later than power-off of the drain voltage.