JPS57115005A - Load driving circuit - Google Patents
Load driving circuitInfo
- Publication number
- JPS57115005A JPS57115005A JP56001473A JP147381A JPS57115005A JP S57115005 A JPS57115005 A JP S57115005A JP 56001473 A JP56001473 A JP 56001473A JP 147381 A JP147381 A JP 147381A JP S57115005 A JPS57115005 A JP S57115005A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- voltage
- ripple
- transistors
- signal
- 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
Abstract
PURPOSE: To increase the power conversion efficiency and to make less beat interference, by turning on/off a switching element through the use of a PWM signal having a repetitive frequency 2n times the frequency of an AC voltage.
CONSTITUTION: A clock pulse (h) from a clock generator 13 becomes a rectangular wave pulse (i) frequency-divided to 1/2 at a frequency divider 15 and is supplied to a control circuit 4 via an isolator 16, transistors Q1, Q2 are turned on/off alternately and a rectangular AC voltage is outputted on the secondary winding L2 of a transformer T. Power supply voltages +Vcc, -Vcc obtained through full-wave rectification of the AC voltage include ripple. On the other hand, a PWM amplifier 6 is so constituted that an input signal vi is sampled with a saw-tooth wave signal (a) generated in synchronizing with the clock pulse (h) to obtain a PWM signal, then the above-mentioned ripple and the transit point of transistors Q3, Q4 are overlapped, allowing to neglect the effect of ripple at a push-pull output (f).
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56001473A JPS57115005A (en) | 1981-01-08 | 1981-01-08 | Load driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56001473A JPS57115005A (en) | 1981-01-08 | 1981-01-08 | Load driving circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57115005A true JPS57115005A (en) | 1982-07-17 |
JPH027521B2 JPH027521B2 (en) | 1990-02-19 |
Family
ID=11502422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56001473A Granted JPS57115005A (en) | 1981-01-08 | 1981-01-08 | Load driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57115005A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8054053B2 (en) | 2008-02-27 | 2011-11-08 | Onkyo Corporation | Audio apparatus, switching power supply, and switching control method |
-
1981
- 1981-01-08 JP JP56001473A patent/JPS57115005A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8054053B2 (en) | 2008-02-27 | 2011-11-08 | Onkyo Corporation | Audio apparatus, switching power supply, and switching control method |
Also Published As
Publication number | Publication date |
---|---|
JPH027521B2 (en) | 1990-02-19 |
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