JPS6432778A - Cathode ray tube circuit - Google Patents
Cathode ray tube circuitInfo
- Publication number
- JPS6432778A JPS6432778A JP18769287A JP18769287A JPS6432778A JP S6432778 A JPS6432778 A JP S6432778A JP 18769287 A JP18769287 A JP 18769287A JP 18769287 A JP18769287 A JP 18769287A JP S6432778 A JPS6432778 A JP S6432778A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- feed
- ray tube
- cathode ray
- back circuit
- 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.)
- Granted
Links
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To realize the stabilization of bias voltage to the first grid or cathode of a cathode ray tube with simple constitution by providing a transistor to control a collector current at the time of fluctuating a voltage source to constitute a feed-back circuit to hold the bias voltage constant. CONSTITUTION:A negative voltage V0 obtained on the secondary side of a flyback transformer FBT is made into a negative voltage source, this is supplied to the first grid G1 of a cathode ray tube (CRT) through a diode D1 and a capacitor C1 and further, through a feed-back circuit FBC, and a prescribed bias voltage is obtained. The feed-back circuit FBC adjusts a voltage drop in an R1, offsets the rise of a V2, and always holds a value constant by a feed- back group formed among the base collector of a partial pressure resistor R1, a variable resistor VR1, and a transistor TR1 and by a reference voltage set by a Zener diode D2 in the emitter of the TR1, in accordance with the rise of the input voltage V2 of the G1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62187692A JPH0652940B2 (en) | 1987-07-29 | 1987-07-29 | Cathode ray tube circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62187692A JPH0652940B2 (en) | 1987-07-29 | 1987-07-29 | Cathode ray tube circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6432778A true JPS6432778A (en) | 1989-02-02 |
| JPH0652940B2 JPH0652940B2 (en) | 1994-07-06 |
Family
ID=16210478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62187692A Expired - Fee Related JPH0652940B2 (en) | 1987-07-29 | 1987-07-29 | Cathode ray tube circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652940B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6147565U (en) * | 1984-08-31 | 1986-03-29 | 日本電気ホームエレクトロニクス株式会社 | Brightness adjustment circuit for character display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177529A (en) * | 1978-08-18 | 1979-12-11 | Deere & Company | Filter wrench |
-
1987
- 1987-07-29 JP JP62187692A patent/JPH0652940B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6147565U (en) * | 1984-08-31 | 1986-03-29 | 日本電気ホームエレクトロニクス株式会社 | Brightness adjustment circuit for character display |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0652940B2 (en) | 1994-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |