JPS57136825A - Super-regenerative receiving system - Google Patents
Super-regenerative receiving systemInfo
- Publication number
- JPS57136825A JPS57136825A JP2345481A JP2345481A JPS57136825A JP S57136825 A JPS57136825 A JP S57136825A JP 2345481 A JP2345481 A JP 2345481A JP 2345481 A JP2345481 A JP 2345481A JP S57136825 A JPS57136825 A JP S57136825A
- Authority
- JP
- Japan
- Prior art keywords
- quenching
- oscillating circuit
- super
- oscillation stop
- converted
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE:To prevent the lowering of receiving sensitivity which is caused by the noise, etc., by detecting the oscillation stop conditions of a quenching oscillating circuit included in a super-regenerative system front end and then controlling the quenching oscillating circuit based on the detection of the oscillation stop condition. CONSTITUTION:The input signal supplied through an antenna 1 is applied to a super-regenerative system front end 2 to be converted into a low frequency signal. This output is sent to a signal level discriminating circuit 5 via a low frequency amplifying circuit 3 and a band pass filter 4 to be converted into the DC voltage according to the amplitude. If the level of this DC voltage is higher than a prescribed value, a normal signal is decided to be delivered through a speaker 6 functioning as a display device. When some fault arises to the working of the front end 2, the frequency of a quenching oscillating circuit included in the front end 2 increases. Based on this oscillation stop conditions, the quenching oscillating circuit is controlled to obtain the optimum receiving sensitivity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2345481A JPS57136825A (en) | 1981-02-18 | 1981-02-18 | Super-regenerative receiving system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2345481A JPS57136825A (en) | 1981-02-18 | 1981-02-18 | Super-regenerative receiving system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57136825A true JPS57136825A (en) | 1982-08-24 |
JPS632177B2 JPS632177B2 (en) | 1988-01-18 |
Family
ID=12110942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2345481A Granted JPS57136825A (en) | 1981-02-18 | 1981-02-18 | Super-regenerative receiving system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57136825A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5696507A (en) * | 1979-12-15 | 1981-08-04 | Matsushita Electric Works Ltd | Superregenerative receiver |
JPS56126331A (en) * | 1980-03-10 | 1981-10-03 | Matsushita Electric Works Ltd | Super-regenerative front end of wireless receiver |
-
1981
- 1981-02-18 JP JP2345481A patent/JPS57136825A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5696507A (en) * | 1979-12-15 | 1981-08-04 | Matsushita Electric Works Ltd | Superregenerative receiver |
JPS56126331A (en) * | 1980-03-10 | 1981-10-03 | Matsushita Electric Works Ltd | Super-regenerative front end of wireless receiver |
Also Published As
Publication number | Publication date |
---|---|
JPS632177B2 (en) | 1988-01-18 |
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