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1. 发明专利

GB9101038D0 AUDIO AMPLIFIERS 未知
公开(公告)号：GB9101038D0
公开(公告)日：1991-02-27
申请号：GB9101038
申请日：1991-01-17
申请人： JIM MARSHALL PRODUCTS LIMITED
IPC分类号： G10H1/16 , H03F1/32 , H03G5/16 , H04R3/04
摘要： PCT No. PCT/GB92/00075 Sec. 371 Date Jan. 18, 1994 Sec. 102(e) Date Jan. 18, 1994 PCT Filed Jan. 14, 1992 PCT Pub. No. WO92/13388 PCT Pub. Date Aug. 6, 1992.A solid state audio amplifier for connection with a loudspeaker cabinet or emulation thereof to provide amplification characteristics emulating in frequency response those of a valve audio amplifier driving a loudspeaker cabinet. The loudspeaker cabinet comprises a loudspeaker drive and its enclosure. The frequency response of the audio amplifier exhibits a low frequency resonant peak in gain representing the fundamental resonance of the loudspeaker cabinet and a monotonic increase in gain at higher frequency associated with the impedance provided voice coil inductance of the loudspeaker cabinet. The audio amplifier comprises an amplifier and gain control circuitry associated therewith. The amplifier comprises a differential amplifier and the gain control circuitry comprises a impedance network connected in feedback. The impedance network comprises a tuned circuit connected to create the low frequency resonant peak in gain and a reactance providing the increase in gain at higher frequency. The tuned circuit comprises a capacitance and a gyrator circuit simulating an inductance and the reactance comprises a capacitance.

2. 发明申请

WO1992013388A1 SOLID STATE AUDIO AMPLIFIER EMULATING A TUBE AUDIO AMPLIFIER 审中-公开
标题翻译：固态音频放大器仿真管音频放大器
公开(公告)号：WO1992013388A1
公开(公告)日：1992-08-06
申请号：PCT/GB1992000075
申请日：1992-01-14
申请人： JIM MARSHALL (PRODUCTS) LIMITED , KEIR, Bruce
发明人： JIM MARSHALL (PRODUCTS) LIMITED
IPC分类号： H03G05/16
CPC分类号： H03F1/327 , G10H1/16 , H03G5/165 , H04R3/04
摘要： For the purposes of emulating the audio frequency response of a valve audio amplifier driving a loudspeaker cabinet, solid state audio amplifier means comprises an amplifier (IC1A) and gain control circuitry (Z1, Z2) adapted to exhibit a low frequency resonant peak in gain representing the fundamental resonance of the loudspeaker cabinet and a monotonic increase in gain at higher frequency associated with the voice coil inductance of the loudspeaker cabinet. The gain control circuitry may include a tune circuit creating the low frequency resonant peak and a reactance.
摘要翻译：为了模拟驱动扬声器柜的阀音频放大器的音频响应的目的，固态音频放大器装置包括放大器（IC1A）和增益控制电路（Z1，Z2），其适于在增益表现出低频谐振峰值扬声器机柜的基本共振和与扬声器机箱的音圈电感相关的较高频率的增益单调增加。增益控制电路可以包括产生低频谐振峰值和电抗的调谐电路。

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