JPS5888167U - frequency detection circuit - Google Patents
frequency detection circuitInfo
- Publication number
- JPS5888167U JPS5888167U JP18220581U JP18220581U JPS5888167U JP S5888167 U JPS5888167 U JP S5888167U JP 18220581 U JP18220581 U JP 18220581U JP 18220581 U JP18220581 U JP 18220581U JP S5888167 U JPS5888167 U JP S5888167U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- detection circuit
- frequency detection
- voltage
- field effect
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図及び第２図はそれぞれ従来の周波数検出□回路の
異なる例を示した接続図、第３図は本考案の一実施例を
示す接続図、第４図Ａ乃至りは第３図の各部の信号波形
を示す線図、第５図はＦＥＴの特性の一例を示す線図、
第６図は本考案の検出回路の応用例を示す接続図、第７
図乃至第９図はそれぞれ第６図の応用例で用いる電源の
異なる変形例を示す接続図である。
１・・・・・・信号源回路、２；・・・・・周波数検出
回路、３・・・・・・バッテリ、Ｃ１・・・・・・第１
のコンデンサ、Ｃ２・・・・・・第２のコンデンサ、Ｄ
１Ｄ２・・・・・・ダイオード、Ｒ１・・・・・・放電
抵抗、Ｆ□・・・・・・電界効果トランジスタ。1 and 2 are connection diagrams showing different examples of conventional frequency detection □ circuits, FIG. 3 is a connection diagram showing one embodiment of the present invention, and FIGS. A diagram showing the signal waveform of each part, Fig. 5 is a diagram showing an example of the characteristics of the FET,
Figure 6 is a connection diagram showing an application example of the detection circuit of the present invention;
9 to 9 are connection diagrams showing different modifications of the power supply used in the applied example of FIG. 6, respectively. 1: Signal source circuit, 2: Frequency detection circuit, 3: Battery, C1: 1st
capacitor, C2...Second capacitor, D
1D2...Diode, R1...Discharge resistor, F□...Field effect transistor.
Claims (1)
のコンデンサと、前記第１のコンデンサの電荷により一
方の極性に充電される第２のコンデンサと、前記第２の
コンデンサに対して並列に接続された放電抵抗と、前記
第２のコンデンサの両端の電圧がゲートソース間に印加
されドレインが抵抗を通して直流電源に接続された電界
効果トランジスタとを具備し、前記電界効果トランジス
タのゲートソース間に被検出周波数に比例した電圧を得
る周波数検出回路。The first one is charged to one polarity by the voltage of the detected frequency.
a second capacitor charged to one polarity by the electric charge of the first capacitor, a discharge resistor connected in parallel to the second capacitor, and a discharge resistor connected at both ends of the second capacitor. A frequency detection circuit comprising a field effect transistor to which a voltage is applied between the gate and the source and whose drain is connected to a DC power supply through a resistor, and obtains a voltage proportional to a detected frequency between the gate and the source of the field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18220581U JPS5888167U (en) | 1981-12-09 | 1981-12-09 | frequency detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18220581U JPS5888167U (en) | 1981-12-09 | 1981-12-09 | frequency detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5888167U true JPS5888167U (en) | 1983-06-15 |
Family
ID=29980364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18220581U Pending JPS5888167U (en) | 1981-12-09 | 1981-12-09 | frequency detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5888167U (en) |
-
1981
- 1981-12-09 JP JP18220581U patent/JPS5888167U/en active Pending
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