JPS5658317A - Radio receiver - Google Patents
Radio receiverInfo
- Publication number
- JPS5658317A JPS5658317A JP13468279A JP13468279A JPS5658317A JP S5658317 A JPS5658317 A JP S5658317A JP 13468279 A JP13468279 A JP 13468279A JP 13468279 A JP13468279 A JP 13468279A JP S5658317 A JPS5658317 A JP S5658317A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- tuning
- charge
- detection circuit
- discharge
- 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
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
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
- H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
- H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
Landscapes
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To make easy the tuning operation, by setting the reception frequency through charge/discharge of a capacitor based on the channel selection command and performing the charge/discharge of the capacitor with the output of a tuning shift detection circuit after that. CONSTITUTION:When a push button is depressed, a reception frequency set circuit 48 charges up a capacitor 37. Further, the oscillating frequency fo starts increasing according to the time constant determined with the capacitor 37. If a specific broadcast station is received, a tuning detection circuit detects this state to stop the increase in the tuning frequency fr. After that, the charging of the capacitor 37 is controlled with the output signal of the tuning shift detection circuit 20 via a charge/ discharge control circuit 43.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13468279A JPS6030449B2 (en) | 1979-10-18 | 1979-10-18 | Receiving machine |
US06/195,474 US4344187A (en) | 1979-10-18 | 1980-10-09 | Radio receiver with system for maintaining optimum tuning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13468279A JPS6030449B2 (en) | 1979-10-18 | 1979-10-18 | Receiving machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5658317A true JPS5658317A (en) | 1981-05-21 |
JPS6030449B2 JPS6030449B2 (en) | 1985-07-16 |
Family
ID=15134099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13468279A Expired JPS6030449B2 (en) | 1979-10-18 | 1979-10-18 | Receiving machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6030449B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62135162U (en) * | 1986-02-18 | 1987-08-25 |
-
1979
- 1979-10-18 JP JP13468279A patent/JPS6030449B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6030449B2 (en) | 1985-07-16 |
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