JPS57171809A - Power amplifying circuit - Google Patents
Power amplifying circuitInfo
- Publication number
- JPS57171809A JPS57171809A JP18092880A JP18092880A JPS57171809A JP S57171809 A JPS57171809 A JP S57171809A JP 18092880 A JP18092880 A JP 18092880A JP 18092880 A JP18092880 A JP 18092880A JP S57171809 A JPS57171809 A JP S57171809A
- Authority
- JP
- Japan
- Prior art keywords
- amplifying circuit
- circuit
- power amplifying
- power
- terminal
- 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
Abstract
PURPOSE: To improve electric power efficiency and distortion factor characteristics by connecting a PWM type power amplifying circuit to a class "A" or "B" power amplifying circuit in parallel in an audio power amplifying circuit, and adding their outputs on an output side after passing them through an LPF and an HPF respectively.
CONSTITUTION: An input signal applied to an input terminal 10 is amplified by a PWM amplifying circuit 19 consisting of a pulse-width modulating circuit composed of a triangular-wave generating circuit 12 and a comparator 13, a pulse amplifier 14, a pulse-width modulating switching circuit 16 energized by a DC power source 15, and an LPF17, sending an acoustic output to a load 21 through an output terminal 20. The signal from the terminal 10, on the other hand, also appears at a terminal 20 through a class "A" or "B" power amplifying circuit 25 having a gain equal to that of the circuit 19 and an HPF26. The LPF17 and HPF26 are band split filters which have crossover at an about 1KHz relatively- low frequency, and their composite characteristics are flat over the entire range. Thus, the power amplifying circuit has superior power efficiency and superior acoustic characteristics such as power efficiency.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18092880A JPS57171809A (en) | 1980-12-19 | 1980-12-19 | Power amplifying circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18092880A JPS57171809A (en) | 1980-12-19 | 1980-12-19 | Power amplifying circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57171809A true JPS57171809A (en) | 1982-10-22 |
Family
ID=16091724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18092880A Pending JPS57171809A (en) | 1980-12-19 | 1980-12-19 | Power amplifying circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57171809A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3023089A1 (en) * | 2014-06-30 | 2016-01-01 | Devialet | AUDIO AMPLIFIER VERY HIGH FIDELITY |
-
1980
- 1980-12-19 JP JP18092880A patent/JPS57171809A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3023089A1 (en) * | 2014-06-30 | 2016-01-01 | Devialet | AUDIO AMPLIFIER VERY HIGH FIDELITY |
WO2016001253A1 (en) * | 2014-06-30 | 2016-01-07 | Devialet | Very high fidelity audio amplifier |
US10483914B2 (en) | 2014-06-30 | 2019-11-19 | Devialet | Very high fidelity audio amplifier |
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