JPS5494857A - Load protection circuit - Google Patents
Load protection circuitInfo
- Publication number
- JPS5494857A JPS5494857A JP118478A JP118478A JPS5494857A JP S5494857 A JPS5494857 A JP S5494857A JP 118478 A JP118478 A JP 118478A JP 118478 A JP118478 A JP 118478A JP S5494857 A JPS5494857 A JP S5494857A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- shift
- load
- collector
- middle point
- 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
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To avoid the damage of load (speakers etc.) due to the middle point DC voltage shift, by enabling to set freely the shift in the push pull output circuit.
CONSTITUTION: The collector of transistor Q1 taking the base and collector common, is connected to the output point of the push pull output circuit 4 via the Zener diode D and resistor Ro constituting the level shift circuit 3. Further, Q2 taking common the base of Q1 is provided, forming the current Miller circuit. The resistor R3 placed on the collector of Q2 adjusts the threshold voltage of the amplifying circuit 1, that is, matches the input signal of the amplifying circuit 1 required to turn on the switching means 5 such as relays with the detected middle point. Thus, the switching means 5 placed to load protection can be set depending on the shift of arbitrary middle point potential and the protection according to the permissible value of load can be made.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53001184A JPS6046848B2 (en) | 1978-01-11 | 1978-01-11 | load protection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53001184A JPS6046848B2 (en) | 1978-01-11 | 1978-01-11 | load protection circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5494857A true JPS5494857A (en) | 1979-07-26 |
JPS6046848B2 JPS6046848B2 (en) | 1985-10-18 |
Family
ID=11494356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53001184A Expired JPS6046848B2 (en) | 1978-01-11 | 1978-01-11 | load protection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6046848B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007088921A (en) * | 2005-09-22 | 2007-04-05 | Matsushita Electric Ind Co Ltd | Speaker protecting circuit |
-
1978
- 1978-01-11 JP JP53001184A patent/JPS6046848B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007088921A (en) * | 2005-09-22 | 2007-04-05 | Matsushita Electric Ind Co Ltd | Speaker protecting circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6046848B2 (en) | 1985-10-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5657316A (en) | Electric power amplifier | |
JPS57111116A (en) | Comparator having hysteresis | |
JPS5753112A (en) | Sepp power amplifier | |
JPS5421102A (en) | Semiconductor device circuit | |
JPS57173220A (en) | Comparator circuit | |
JPS52112261A (en) | Power amplifier circuit | |
JPS5494857A (en) | Load protection circuit | |
JPS5592006A (en) | Amplifier | |
JPS5761336A (en) | Output protection circuit of integrated injection logical circuit | |
JPS5544238A (en) | Signal switching circuit | |
JPS53131457A (en) | Constant voltage circuit | |
JPS5239156A (en) | High voltage generating circuit | |
JPS54161305A (en) | Ac amplifying device | |
JPS54161304A (en) | Amplifying device | |
JPS54156143A (en) | Power source system | |
JPS57107618A (en) | Power amplifier | |
JPS54136619A (en) | Dc voltage stabilized power unit | |
JPS55163461A (en) | Absolute value detection circuit | |
JPS5797227A (en) | Electronic switching amplifying circuit | |
JPS5676686A (en) | Horizontal oscillation circuit | |
JPS5366266A (en) | Semiconductive type shunt circuit | |
JPS57168511A (en) | Transient darlington transistor circuit of high current amplification factor | |
JPS57142012A (en) | Transistor circuit | |
JPS51111036A (en) | Transistor circuit | |
JPS548922A (en) | Gain control circuit for chroma signal |