JPH0175876U - - Google Patents
Info
- Publication number
- JPH0175876U JPH0175876U JP1987171797U JP17179787U JPH0175876U JP H0175876 U JPH0175876 U JP H0175876U JP 1987171797 U JP1987171797 U JP 1987171797U JP 17179787 U JP17179787 U JP 17179787U JP H0175876 U JPH0175876 U JP H0175876U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- frequency
- measuring device
- occurs
- junction element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
第１図はこの考案の一実施例による周波数測定
装置を示す機能ブロツク図、第２図は直流信号の
みを印加した時のジヨセフソン接合のＩ―Ｖ特性
図、第３図は直流と交流を同時に印加した時のＩ
―Ｖ特性図、第４図は第１図の各部の出力波形を
示す説明図、第５図はこの考案の他の実施例を示
す機能ブロツク図、第６図は従来の周波数測定装
置を示す機能ブロツク図である。
１はジヨセフソン接合素子、２は可変直流電源
、３は増幅器、４は抵抗、５は遅延回路、６は差
分増幅器、７は制御回路である。
Fig. 1 is a functional block diagram showing a frequency measuring device according to an embodiment of this invention, Fig. 2 is an IV characteristic diagram of a Josephson junction when only a DC signal is applied, and Fig. 3 is a diagram showing DC and AC signals simultaneously. I when applied
-V characteristic diagram, Fig. 4 is an explanatory diagram showing the output waveforms of each part of Fig. 1, Fig. 5 is a functional block diagram showing another embodiment of this invention, and Fig. 6 shows a conventional frequency measuring device. It is a functional block diagram. 1 is a Josephson junction element, 2 is a variable DC power supply, 3 is an amplifier, 4 is a resistor, 5 is a delay circuit, 6 is a differential amplifier, and 7 is a control circuit.
Claims (1)
印加する直流電源と、 上記ジヨセフソン接合素子に直流と同時に交流
信号が印加された時に、上記ジヨセフソン接合素
子に流れる直流電流階段状変化（シヤピロステツ
プ）が生じる印加電圧の間隔を測定し、上記交流
信号の周波数を得る手段を備えたことを特徴とす
る周波数測定装置。 (2) 上記印加電圧の間隔を、ジヨセフソン接合
素子と抵抗の両端に一定電圧を印加したときその
一方に生じる電圧と、これを遅延する電圧との差
の出力に生じるピーク値間の時間間隔から求める
ことを特徴とする特許請求の範囲第１項記載の周
波数測定装置。[Scope of Claim for Utility Model Registration] (1) A DC voltage source that applies a DC voltage to both ends of the DC voltage junction element; 1. A frequency measuring device comprising means for measuring the interval between applied voltages at which a step change (shapiro step) occurs in the direct current flowing through the junction element, and obtaining the frequency of the alternating current signal. (2) The interval between the above applied voltages is calculated from the time interval between the peak value that occurs in the output of the difference between the voltage that occurs on one side when a constant voltage is applied across the Josephson junction element and the resistor, and the voltage that delays this. The frequency measuring device according to claim 1, characterized in that the frequency measuring device calculates the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987171797U JPH0175876U (en) | 1987-11-10 | 1987-11-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987171797U JPH0175876U (en) | 1987-11-10 | 1987-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0175876U true JPH0175876U (en) | 1989-05-23 |
Family
ID=31463808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987171797U Pending JPH0175876U (en) | 1987-11-10 | 1987-11-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0175876U (en) |
-
1987
- 1987-11-10 JP JP1987171797U patent/JPH0175876U/ja active Pending
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