| 摘要 |
PROBLEM TO BE SOLVED: To provide an impedance measuring circuit of a fine conductive region capable of separating high frequency input terminal and output terminal and obtaining output signals proportional to the admittance of a single electron transistor without increasing the number of circuit components. SOLUTION: In the fine conductive region 7 where the charge energy of a single electron is almost the same as or more than heat energy at an operation temperature, a tunnel barrier 5 and a tunnel barrier 6 are provided. The tunnel barrier 5 is connected to a first terminal (high frequency input terminal) 1, and the tunnel barrier 6 is grounded through a capacitor 9 and also connected to a second terminal (high frequency output terminal) 3 through an inductor 8. The high frequency signals of a resonance frequency determined by the capacitor 9 and the inductance of the inductor 8 are input to the first terminal 1, and the time dependency of charges in the fine conductive region 7 is measured by the transmission characteristics of the high frequency signals output from the second terminal 3. COPYRIGHT: (C)2009,JPO&INPIT
|
