JPS57104311A - Television signal receiving amplifier - Google Patents
Television signal receiving amplifierInfo
- Publication number
- JPS57104311A JPS57104311A JP55180748A JP18074880A JPS57104311A JP S57104311 A JPS57104311 A JP S57104311A JP 55180748 A JP55180748 A JP 55180748A JP 18074880 A JP18074880 A JP 18074880A JP S57104311 A JPS57104311 A JP S57104311A
- Authority
- JP
- Japan
- Prior art keywords
- current
- state
- region
- receiving amplifier
- distortion
- 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
- Details Of Television Systems (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE: To reduce the occurrence of distortion to receive high-quality pictures, by controlling the base bias of a transistor amplifier and the feedback quantity while interlocking them with each other.
CONSTITUTION: In case that this receiving amplifier is used in the region of a strong electric field, a variable resistance 23 of a field selecting means 15 is moved to the side of the first terminal 20. Under this state, since the base current of a transistor TR 4 is increased, the collector current is increased, and the amplification characteristic of the TR 4 is operated in a low-distortion state. Then, a current flowed to a diode 11 is reduced; and through the current is fed back negatively, it matters little in the region of a strong field. In case that this receiving amplifier is used in the region of a weak field, the variable resistance 23 is moved to the side of the second terminal 21. Under this state, the collector current of the TR 4 is reduced, and a current flowed to the diode 11 becoms a large value, and the amplifying function is executed under a good negative feedback state. Since the input signal level is small, the distortion rate of the TR 4 is not a large matter.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55180748A JPS57104311A (en) | 1980-12-19 | 1980-12-19 | Television signal receiving amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55180748A JPS57104311A (en) | 1980-12-19 | 1980-12-19 | Television signal receiving amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57104311A true JPS57104311A (en) | 1982-06-29 |
Family
ID=16088619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55180748A Pending JPS57104311A (en) | 1980-12-19 | 1980-12-19 | Television signal receiving amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57104311A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54105449A (en) * | 1978-02-06 | 1979-08-18 | Maspro Denko Kk | Community receiving amplifier |
JPS5513417B2 (en) * | 1973-03-07 | 1980-04-09 |
-
1980
- 1980-12-19 JP JP55180748A patent/JPS57104311A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5513417B2 (en) * | 1973-03-07 | 1980-04-09 | ||
JPS54105449A (en) * | 1978-02-06 | 1979-08-18 | Maspro Denko Kk | Community receiving amplifier |
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