【摘要】 本文提出了通过电路技术大幅度提高JFFT输入阻抗及降低栅流的原理和方法。所给高效能JFET组合及其各种组态,除可使Z_in提高2～3个数量级、I_in降低2个数量级外,尚有近50db的电源干扰抑制比及强化了栅极自保护能力。为微弱讯号放大器提供了理想的输入电路。现已成功的应用于生物微电极放大器及红外TGS探头。更多还原

【Abstract】 The principle and method of circuit design that can rise up theinput impedence and decrease the input leakage current of a JFET by two or-der of magnitude are presented in this paper. Besides the anti-inteference abi-lify, stablity and the self-protecting ability can also be improved by thistechnique.更多还原