JPS5579510A - Amplifier - Google Patents
AmplifierInfo
- Publication number
- JPS5579510A JPS5579510A JP15445878A JP15445878A JPS5579510A JP S5579510 A JPS5579510 A JP S5579510A JP 15445878 A JP15445878 A JP 15445878A JP 15445878 A JP15445878 A JP 15445878A JP S5579510 A JPS5579510 A JP S5579510A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- bias
- constant
- capacitor
- trq12
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To obtain an amplifier of high efficiency with a low voltage power supply by connecting a bias circuit, which applies an AC bias with a constant current or DC bias with a constant voltage, to the base of complementary transistors Tr with collectors connected mutually for output terminals. CONSTITUTION:Transistors TrQ11 and TrQ12 are of the PNP type, and Trs Q13 and Q14 are of the NPN type; collectors of both Trs Q12 and Q14 are connected in common and then connected to speaker SP by way of capacitor C. A circuit composed of TrQ11, capacitor C1 and resistance R2 and that of TrQ13, capacitor C2 and resistance R4 are bias circuits which can be considered AC constant-current sources or DC constant power supplies. Those bias circuits equalize the largest output voltage to a value obtained by subtracting emitter-collector saturating voltage of TrQ12 and Q14 from the power voltage and a voltage use ratio is about 97%, so that efficient amplification can be attained even in case of a low-voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15445878A JPS5579510A (en) | 1978-12-13 | 1978-12-13 | Amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15445878A JPS5579510A (en) | 1978-12-13 | 1978-12-13 | Amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5579510A true JPS5579510A (en) | 1980-06-16 |
Family
ID=15584663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15445878A Pending JPS5579510A (en) | 1978-12-13 | 1978-12-13 | Amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5579510A (en) |
-
1978
- 1978-12-13 JP JP15445878A patent/JPS5579510A/en active Pending
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