JPS5787218A - Load driving circuit - Google Patents
Load driving circuitInfo
- Publication number
- JPS5787218A JPS5787218A JP55162892A JP16289280A JPS5787218A JP S5787218 A JPS5787218 A JP S5787218A JP 55162892 A JP55162892 A JP 55162892A JP 16289280 A JP16289280 A JP 16289280A JP S5787218 A JPS5787218 A JP S5787218A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- voltage
- pulse width
- output
- input
- 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
- Amplifiers (AREA)
Abstract
PURPOSE: To reduce the power cunsumption and improve the power conversion efficiency, by subjecting and AC voltage of a square waveform to pulse width modulation in accordance with an input signal and by driving a load by a signal obtained by integrating this output.
CONSTITUTION: An AC voltage V3 of a square waveform which is the output of a square wave voltage generating circuit 1 is modulated by a pulse width corresponding to an input voltage vi in a pulse width modulating means 8, and the output passes through an integrating means 9 of an LPF constitution of drive a load RL such as a speaker. Voltages of positive and negative equal levels appear alternately in respect to the voltage V3, and a triangular signal is generated in a modulation signal generating circuit 11 of the means 8, and the input signal vi is sampled by this signal to generate a modulation signal of a pulse width corresponding to the signal vi, and a switching element 10 is controlled to subject the voltage V3 to pulse width modulation. The output of the circuit 11 has a frequency twice as high as the frequency of the voltage V3 when the signal vi is zero, and the width of positive pulses of the input of the means 9 becomes wider according as the signal vi becomes higher than zero, and the width of negative pulses becomes wider according as the signal vi becomes lower then zero. This signal becomes an analogue signal in the means 9 to drive the load R.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55162892A JPS5787218A (en) | 1980-11-19 | 1980-11-19 | Load driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55162892A JPS5787218A (en) | 1980-11-19 | 1980-11-19 | Load driving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5787218A true JPS5787218A (en) | 1982-05-31 |
Family
ID=15763228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55162892A Pending JPS5787218A (en) | 1980-11-19 | 1980-11-19 | Load driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5787218A (en) |
-
1980
- 1980-11-19 JP JP55162892A patent/JPS5787218A/en active Pending
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