JPS6489962A - Power circuit - Google Patents
Power circuitInfo
- Publication number
- JPS6489962A JPS6489962A JP62242546A JP24254687A JPS6489962A JP S6489962 A JPS6489962 A JP S6489962A JP 62242546 A JP62242546 A JP 62242546A JP 24254687 A JP24254687 A JP 24254687A JP S6489962 A JPS6489962 A JP S6489962A
- Authority
- JP
- Japan
- Prior art keywords
- section
- pwm controlling
- circuit section
- auxiliary discharge
- discharge 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.)
- Pending
Links
Landscapes
- Television Receiver Circuits (AREA)
- Dc-Dc Converters (AREA)
Abstract
PURPOSE:To prevent undesired noise from being generated, by providing a PWM controlling section with an auxiliary discharge circuit section, and by setting conditions for this properly. CONSTITUTION:By a power circuit, input voltage from an input side IN is applied to a rectifier circuit section 13 via a transformer TR, and also to a PWM controlling section 11 for pulse width modulation. The output side OUT of the rectifier circuit section 13 is provided with a compared voltage detecting section 14, and the output section is connected to the PWM controlling section 11. Besides, between the transformer TR and the PWM controlling section 11, a switch circuit section 12 is set. On the PWM controlling section 11, a resistor R1 and a capacitor C1 for controlling the oscillatory frequency are additionally arranged, and an auxiliary discharge circuit section 15 is set. Besides, to the base of a transistor Q, a condition setting section 16 is connected. Then, by setting conditions for the auxiliary discharge circuit section 15 properly, the oscillatory frequency can be regulated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242546A JPS6489962A (en) | 1987-09-29 | 1987-09-29 | Power circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242546A JPS6489962A (en) | 1987-09-29 | 1987-09-29 | Power circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489962A true JPS6489962A (en) | 1989-04-05 |
Family
ID=17090714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62242546A Pending JPS6489962A (en) | 1987-09-29 | 1987-09-29 | Power circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489962A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59129573A (en) * | 1983-01-14 | 1984-07-25 | Hitachi Metals Ltd | Dc/dc converter |
-
1987
- 1987-09-29 JP JP62242546A patent/JPS6489962A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59129573A (en) * | 1983-01-14 | 1984-07-25 | Hitachi Metals Ltd | Dc/dc converter |
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