9/10/2023 0 Comments Audio overload side by side![]() The execution circuit module: namely, the voltage-limiting self-adaptive circuit, after the triode Q2 is conducted, the Vgs voltage of the field-effect tube Q25 is controlled, the field-effect tube Q25 is a 2SK208 field-effect tube, and the voltage-limiting self-adaptive circuit utilizes the characteristic that different Vgs conduction resistances of the field-effect tubes are different to realize voltage-limiting self-adaptation. The operational amplifier is an LM324 operational amplifier, and the triode is a BC856B triode. The waveform shaping module and the amplifying circuit module are respectively realized through a primary operational amplifier, and the control circuit module is realized through a triode. ![]() The maximum resistance of the potentiometer is 100k omega. The impedance matching module is realized by a first-stage operational amplifier, and the operational amplifier realizes an operational amplifier follower. The current-voltage signal conversion module is realized by a primary operational amplifier and is used for converting the induced current signal into a voltage signal. The execution circuit module is realized through a primary field effect transistor and is used for executing voltage limit self-adaption, and the current transformer is 2000:1, the primary side of the current transformer is used for sampling power amplifier current, and the secondary side of the current transformer is used for generating an induced current signal through mutual inductance and transmitting the induced current signal to a current-voltage signal conversion module, wherein a 2SK208 field effect transistor is adopted as an effect transistor. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Zhejiang Haoyuan Electronic Technology Co ltd filed Critical Zhejiang Haoyuan Electronic Technology Co ltd Priority to CN202222659686.8U priority Critical patent/CN218449459U/en Application granted granted Critical Publication of CN218449459U publication Critical patent/CN218449459U/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee Zhejiang Haoyuan Electronic Technology Co ltd Priority date (The priority date is an assumption and is not a legal conclusion. Zhejiang Haoyuan Electronic Technology Co ltd Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Inventor 刘寒冬 田春峰 邹卫中 周鑫妙 周武敏 Current Assignee (The listed assignees may be inaccurate. ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number CN202222659686.8U Other languages Chinese ( zh) Google Patents Secondary side audio overload protection circuit based on current transformerĭownload PDF Info Publication number CN218449459U CN218449459U CN202222659686.8U CN202222659686U CN218449459U CN 218449459 U CN218449459 U CN 218449459U CN 202222659686 U CN202222659686 U CN 202222659686U CN 218449459 U CN218449459 U CN 218449459U Authority CN China Prior art keywords module current transformer current secondary side protection circuit Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ![]() Google Patents CN218449459U - Secondary side audio overload protection circuit based on current transformer ![]() CN218449459U - Secondary side audio overload protection circuit based on current transformer ![]()
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