JPS5678239A - Tuner - Google Patents
TunerInfo
- Publication number
- JPS5678239A JPS5678239A JP15436679A JP15436679A JPS5678239A JP S5678239 A JPS5678239 A JP S5678239A JP 15436679 A JP15436679 A JP 15436679A JP 15436679 A JP15436679 A JP 15436679A JP S5678239 A JPS5678239 A JP S5678239A
- Authority
- JP
- Japan
- Prior art keywords
- isolator
- terminal
- input
- circuit
- broad
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To lessen the leakage of a local oscillation signal from an antenna terminal by making use of reverse attenuation, by providing the input circuit of the tuner of a TV receiver with an isolator. CONSTITUTION:The 1st and 2nd input terminals 1 and 2 receiving high frequency signals are provided and high frequency signals supplied to input terminals 1 and 2 are selected through the operation of switch circuit 16 and supplied to a VHF tuner part of UHF tuner part by way of branching filter 3. When a signal from a cable TV circuit is received at this input terminal 2, terminal 2 is provided with isolator 15 or a broad-band amplifier and the reverse attenuation of this isolator 15 or the broad-band amplifier is utilized to prevent the oscillation output of local oscillator 13 from leaking from input terminal 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15436679A JPS5678239A (en) | 1979-11-30 | 1979-11-30 | Tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15436679A JPS5678239A (en) | 1979-11-30 | 1979-11-30 | Tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5678239A true JPS5678239A (en) | 1981-06-27 |
Family
ID=15582579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15436679A Pending JPS5678239A (en) | 1979-11-30 | 1979-11-30 | Tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5678239A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60117927A (en) * | 1983-11-30 | 1985-06-25 | Clarion Co Ltd | Synthesizer receiver |
JPS6258929U (en) * | 1985-09-30 | 1987-04-11 |
-
1979
- 1979-11-30 JP JP15436679A patent/JPS5678239A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60117927A (en) * | 1983-11-30 | 1985-06-25 | Clarion Co Ltd | Synthesizer receiver |
JPS6258929U (en) * | 1985-09-30 | 1987-04-11 |
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