JPS5566122A - Automatic channel selector - Google Patents
Automatic channel selectorInfo
- Publication number
- JPS5566122A JPS5566122A JP13905778A JP13905778A JPS5566122A JP S5566122 A JPS5566122 A JP S5566122A JP 13905778 A JP13905778 A JP 13905778A JP 13905778 A JP13905778 A JP 13905778A JP S5566122 A JPS5566122 A JP S5566122A
- Authority
- JP
- Japan
- Prior art keywords
- reception
- frequency
- unpleasant
- secure
- picket fencing
- 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
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/18—Automatic scanning over a band of frequencies
- H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To secure an automatic switching of the reception to the station capable of receiving the good reception frequency in case the unpleasant picket fencing phenomenon by providing the detection circuit and the preset circuit to the automatic channel selector of the FM car radio. CONSTITUTION:Detection circuit 8 detects the occurrence of the picket fencing and consists of high-level detection part 9 and low-level detection part 10 which detect the degree of the strength change after giving a comparison between the level of intermediate frequency signal (a) of intermediate frequency amplifier part 4 and the fixed levels VH and VL, AND gate 11 and period decision part 12 each. Preset circuit 13 applies the voltage corresponding to the reception frequency to variable capacity diodes D1 and D2 to secure the reception state of the fixed frequency, and then switches the application voltage in sequence every time the application voltage is set in correspondence to the reception frequencies of plural stations and signal (b) of the output of part 12 is supplied. With addition of circuits 8 and 13, the reception state can be switched automatically to the broadcast station capable of receiving the good reception in case the unpleasant picket fencing phenomenon occurs, thus contributing to the safe driving.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13905778A JPS5566122A (en) | 1978-11-10 | 1978-11-10 | Automatic channel selector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13905778A JPS5566122A (en) | 1978-11-10 | 1978-11-10 | Automatic channel selector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566122A true JPS5566122A (en) | 1980-05-19 |
Family
ID=15236470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13905778A Pending JPS5566122A (en) | 1978-11-10 | 1978-11-10 | Automatic channel selector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566122A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0427629U (en) * | 1990-06-27 | 1992-03-05 |
-
1978
- 1978-11-10 JP JP13905778A patent/JPS5566122A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0427629U (en) * | 1990-06-27 | 1992-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4590394A (en) | Signal processing circuit with voltage clamped input | |
SE8107411L (en) | RADIORECEIVER | |
US3794925A (en) | Frequency-skipping system for a signal-seeking receiver | |
US4107614A (en) | Muting control circuit for FM receiver | |
JPS5566122A (en) | Automatic channel selector | |
JPS5555619A (en) | Radio receiver | |
US3801914A (en) | Priority-frequency system for a signal-seeking receiver | |
US3761822A (en) | Multiple receiver selection system | |
JPS5746523A (en) | Radio receiver | |
US4348770A (en) | Manual channel selection apparatus | |
JPS5732140A (en) | Receiver | |
US4147986A (en) | AM-FM receiver | |
JPS57112125A (en) | Broadcast receiver | |
JPS5745712A (en) | Channel selecting method for television and radio simultaneous broadcast | |
JPS55127741A (en) | Vehicle communication unit | |
GB1472223A (en) | Super-heterodyne receiver with a digitally adjustable tuning arrangement | |
JPS5610750A (en) | Radio receiver | |
JPS55140337A (en) | Intermodulation disturbance improving circuit of radio receiver | |
JPS56169925A (en) | Short wave receiver | |
JPS6427308A (en) | On-vehicle receiver | |
JPS56120214A (en) | Automatic channel selector | |
JPS6410734A (en) | Receiving device | |
JPS55134583A (en) | Automatic preset channel selector of television receiver | |
JPS5582543A (en) | Fm receiver | |
JPS57206121A (en) | Car radio |