CAJ | 학술논문

一种能实现音频信号变压器传输阻抗自适应的简易方法，该方法采用电子开关并联多个电阻构成电阻匹配网络，采用电压比较器比较变压器输出负载端信号电压与阻抗端信号电压，比较结果输入控制器，控制器通过比较值控制电子开关，以改变电阻的并联关系，使得电阻匹配网络总的阻抗与外部负载相匹配，即外部负载增加，则增大匹配阻抗；外部负载减小，则降低匹配阻抗，从而自动适应外部负负载的变化。该方法较易实现，实用性强。
일충능실현음빈신호변압기전수조항자괄응적간역방법，해방법채용전자개관병련다개전조구성전조필배망락，채용전압비교기비교변압기수출부재단신호전압여조항단신호전압，비교결과수입공제기，공제기통과비교치공제전자개관，이개변전조적병련관계，사득전조필배망락총적조항여외부부재상필배，즉외부부재증가，칙증대필배조항；외부부재감소，칙강저필배조항，종이자동괄응외부부부재적변화。해방법교역실현，실용성강。
This paper gives a method that can fulfill the auto accommodating of the impedallce in voice frequency transformer.In the method,a number of resistances in parallel to be used to conslst of a resistance network,and controlled by the electronic switch.Comparing the input slgnal’s Voltage and the output signal’s voltage via comparators,the MCU control the electronic switch accordlng to the result of the comparators,and the resistance of the resistance network changed coilsequently.So,in the signal traflsmission of voice frequency uses the voice frequency transtbrmer,with the load varied in one side of the trailsformer(the side of the exterllal load), the resistance of reslstance network can be changed accordingly with the method of this paper,and the resistance of the two sides can be matched in time,The method can be achieved easily,and have the practical ettect.