JPS6381461U - - Google Patents
Info
- Publication number
- JPS6381461U JPS6381461U JP17382886U JP17382886U JPS6381461U JP S6381461 U JPS6381461 U JP S6381461U JP 17382886 U JP17382886 U JP 17382886U JP 17382886 U JP17382886 U JP 17382886U JP S6381461 U JPS6381461 U JP S6381461U
- Authority
- JP
- Japan
- Prior art keywords
- field effect
- effect transistor
- time constant
- gate
- horizontal oscillation
- 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
- 230000010355 oscillation Effects 0.000 claims description 14
- 230000005669 field effect Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図乃至第３図は本考案の水平発振周波数切
換回路の各異なる実施例のブロツク回路図、第４
図乃至第６図は従来例の水平発振周波数切換回路
のブロツク回路図である。
１……水平発振周波数を決定するための時定数
回路の時定数の切換えに応じて水平発振周波数が
切換えられる水平発振回路、２，３，４……発振
時定数抵抗、５……発振時定数決定用コンデンサ
、６……電界効果トランジスタ、７……電界効果
トランジスタ６のゲート抵抗、Ｓ……スイツチ、
８……電界効果トランジスタ、９，１４，２３…
…ノイズ吸収コンデンサ、１０，１１……抵抗、
１２……端子、１３……トランジスタ、１５，１
６……抵抗、１７，１８……端子、２２……電界
効果トランジスタ、２４，２５……抵抗、２６…
…ツエナダイオード。
1 to 3 are block circuit diagrams of different embodiments of the horizontal oscillation frequency switching circuit of the present invention, and FIG.
6 through 6 are block circuit diagrams of conventional horizontal oscillation frequency switching circuits. 1...Horizontal oscillation circuit whose horizontal oscillation frequency is switched according to switching of the time constant of the time constant circuit for determining the horizontal oscillation frequency, 2, 3, 4...Oscillation time constant resistance, 5...Oscillation time constant Determining capacitor, 6... Field effect transistor, 7... Gate resistance of field effect transistor 6, S... Switch,
8... Field effect transistor, 9, 14, 23...
...Noise absorption capacitor, 10, 11...Resistor,
12...terminal, 13...transistor, 15,1
6... Resistor, 17, 18... Terminal, 22... Field effect transistor, 24, 25... Resistor, 26...
...Tsena diode.
Claims (1)
時定数の切換えにより水平発振周波数を切換える
ようにした水平発振周波数切換回路において、直
流電源と接地との間に設けた第１の周波数調整用
抵抗と発振時定数決定用コンデンサとの直列接続
回路における前記した第１の周波数調整用抵抗と
発振時定数決定用コンデンサとの接続点に水平発
振回路を接続し、また、前記した第１の周波数調
整用抵抗の電源側の端部にソースが接続されてい
る電界効果トランジスタにおけるドレインに一端
が接続された第２の周波数調整用抵抗の他端を前
記した第１の周波数調整用抵抗の他端部側に接続
し、さらに、前記した電界効果トランジスタにお
けるソースとゲート間にゲート抵抗を接続し、さ
らにまた、前記した電界効果トランジスタのゲー
トと接地間に、前記した電界効果トランジスタの
ゲートをスイツチによつて選択的に接地する手段
を設けてなる水平発振周波数切換回路。 In a horizontal oscillation frequency switching circuit that switches the horizontal oscillation frequency by switching the time constant of a time constant circuit for determining the horizontal oscillation frequency, a first frequency adjustment resistor provided between a DC power supply and ground; A horizontal oscillation circuit is connected to the connection point between the first frequency adjustment resistor and the oscillation time constant determination capacitor in the series connection circuit with the oscillation time constant determination capacitor, and the first frequency adjustment The other end side of the first frequency adjustment resistor, the other end of which is connected to the drain of a field effect transistor whose source is connected to the power supply side end of the resistor. furthermore, a gate resistor is connected between the source and gate of the field effect transistor described above, and furthermore, the gate of the field effect transistor described above is connected between the gate of the field effect transistor described above and the ground by a switch. A horizontal oscillation frequency switching circuit provided with means for selectively grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17382886U JPS6381461U (en) | 1986-11-12 | 1986-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17382886U JPS6381461U (en) | 1986-11-12 | 1986-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6381461U true JPS6381461U (en) | 1988-05-28 |
Family
ID=31111657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17382886U Pending JPS6381461U (en) | 1986-11-12 | 1986-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6381461U (en) |
-
1986
- 1986-11-12 JP JP17382886U patent/JPS6381461U/ja active Pending