JPS5516534A - Fm receiver - Google Patents
Fm receiverInfo
- Publication number
- JPS5516534A JPS5516534A JP8879578A JP8879578A JPS5516534A JP S5516534 A JPS5516534 A JP S5516534A JP 8879578 A JP8879578 A JP 8879578A JP 8879578 A JP8879578 A JP 8879578A JP S5516534 A JPS5516534 A JP S5516534A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- loop filter
- loop
- signal
- 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
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Abstract
PURPOSE: To perform high-sensitivity reception by automatically improving a threshold level by automatically narrowing the band of the loop filter of a FM demodulator equipped with a phase synchronous loop when an input FM signal becomes weak.
CONSTITUTION: When the PLL loop of phase detector 41, loop filter 42 and VCO43 is locked, phase shifter 8 shifts the phase of the output frequency of VCO43 by an angle of 90°, so that the output frequency of phase shifter 8 will be in phase with the output signal of intermediate-frequency amplifier 2. Therefore, an analog voltage in proportion to the output of intermediate-frequency amplifier 2, i.e. the amplitude of an input FM signal is developed at the output of phase detector 7 and the band of the loop filter is controlled by this voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8879578A JPS5516534A (en) | 1978-07-20 | 1978-07-20 | Fm receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8879578A JPS5516534A (en) | 1978-07-20 | 1978-07-20 | Fm receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5516534A true JPS5516534A (en) | 1980-02-05 |
Family
ID=13952782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8879578A Pending JPS5516534A (en) | 1978-07-20 | 1978-07-20 | Fm receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5516534A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61292933A (en) * | 1985-06-20 | 1986-12-23 | Rohm Co Ltd | Method and apparatus for picking up pellet |
JPH09186181A (en) * | 1997-01-27 | 1997-07-15 | Rohm Co Ltd | Method and device for picking up pellet |
-
1978
- 1978-07-20 JP JP8879578A patent/JPS5516534A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61292933A (en) * | 1985-06-20 | 1986-12-23 | Rohm Co Ltd | Method and apparatus for picking up pellet |
JPH09186181A (en) * | 1997-01-27 | 1997-07-15 | Rohm Co Ltd | Method and device for picking up pellet |
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