JPS58111525U - Filter characteristic switching circuit - Google Patents
Filter characteristic switching circuitInfo
- Publication number
- JPS58111525U JPS58111525U JP823382U JP823382U JPS58111525U JP S58111525 U JPS58111525 U JP S58111525U JP 823382 U JP823382 U JP 823382U JP 823382 U JP823382 U JP 823382U JP S58111525 U JPS58111525 U JP S58111525U
- Authority
- JP
- Japan
- Prior art keywords
- switching circuit
- field effect
- effect transistor
- mode
- filter characteristic
- 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
- Networks Using Active Elements (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (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図は従来のフィルタモード切換回路の回路図、第２
図は本考案になるフィルタモード切換回路の一実施例の
回路図、第３図Ａ、 Ｂは第２図の動作図である。
図中符号１はループフィルタ、７は時定数回路、−２８
はスイッチ回路、Ｑ２は電界効果トランジスタである。Figure 1 is a circuit diagram of a conventional filter mode switching circuit, Figure 2 is a circuit diagram of a conventional filter mode switching circuit.
The figure is a circuit diagram of one embodiment of the filter mode switching circuit according to the present invention, and FIGS. 3A and 3B are operation diagrams of FIG. 2. In the figure, 1 is a loop filter, 7 is a time constant circuit, -28
is a switch circuit, and Q2 is a field effect transistor.
Claims (1)
ルタにおいて、前記第１の抵抗の一端に接続された電界
効果トランジスタと、該電界効果トランジスタのゲート
に接続された時定数回路とを具備し、前記時定数回路を
介して前記電界効果トランジスタを制御し前記電界効果
トランジスタのドレイン電流を増減して前記第２のモー
ドから第１のモードに切換えるよう構成したことを特徴
とするフィルタモード切換回路。A filter that obtains a second mode number by changing the resistance value of a first resistor, comprising: a field effect transistor connected to one end of the first resistor; and a time constant circuit connected to the gate of the field effect transistor. A filter characterized in that the filter is configured to control the field effect transistor via the time constant circuit to increase or decrease the drain current of the field effect transistor to switch from the second mode to the first mode. Mode switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP823382U JPS58111525U (en) | 1982-01-26 | 1982-01-26 | Filter characteristic switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP823382U JPS58111525U (en) | 1982-01-26 | 1982-01-26 | Filter characteristic switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58111525U true JPS58111525U (en) | 1983-07-29 |
Family
ID=30020944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP823382U Pending JPS58111525U (en) | 1982-01-26 | 1982-01-26 | Filter characteristic switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58111525U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5221883A (en) * | 1975-08-12 | 1977-02-18 | Aichi Tokei Denki Co Ltd | Temperature measuring apparatus |
-
1982
- 1982-01-26 JP JP823382U patent/JPS58111525U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5221883A (en) * | 1975-08-12 | 1977-02-18 | Aichi Tokei Denki Co Ltd | Temperature measuring apparatus |
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