【摘要】 本文简单介绍为RF-SQUID测量系统设计的二个单元电路。在高频头中的射频电平调节电路中使用了双栅极场效应管;在控制仪中的相敏解调电路用放大器、电子开关和加法器组成。文章最后简单介绍了该系统的性能测量记录.更多还原

【Abstract】 The paper presents two circuits designed for RF-SQUID measuring system.Employing a bigrid EFT,the modulator circuit in the rf head is designed for rf level control.The phase-sensitive demodulator circuit in the control unit consist of amplifiers,switchers and adder.The performance test summary record of the RF-SQUID measuring system is briefed in the end.更多还原