JPS5725730A - Detecting device of noise intensity - Google Patents
Detecting device of noise intensityInfo
- Publication number
- JPS5725730A JPS5725730A JP10072680A JP10072680A JPS5725730A JP S5725730 A JPS5725730 A JP S5725730A JP 10072680 A JP10072680 A JP 10072680A JP 10072680 A JP10072680 A JP 10072680A JP S5725730 A JPS5725730 A JP S5725730A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- voltage
- rectified
- comparator
- intensity
- 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
- 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
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To ensure an accurate detection of the noise intensity, by giving distinction between the higher harmonic component and the noise of an aural signal. CONSTITUTION:A receiving circuit 2 supplies a received signal (a) converted into an aural band to a filter 3 and also supplies the voltage proportional to the intensity of received electric field to a comparator 11 of an electric field intensity deciding circuit 10. For the signal (a), only the noise component (b) is extracted. Then the signal (a) is rectified through the 1st and 2nd wave detectors 5 and 8 respectively. The voltage rectified through the detector 5 is turned into the input of a switch 15 via a amplifier 6. The voltage rectified through the detector 8 is compared with the reference voltage V1, and the 1st decision signal (f) is delivered through a comparator 9 when the rectified voltage is higher than the voltage V1. On the other hand, a field intensity signal (d) is compared with the reference voltage V2, and 2nd decision signal (g) is delivered through a comparator 11 when the signal (d) is larger than the voltage V2. These two signals (f) and (g) are supplied to an AND circuit 12, and the switch 15 is opened with the AND output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10072680A JPS5725730A (en) | 1980-07-21 | 1980-07-21 | Detecting device of noise intensity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10072680A JPS5725730A (en) | 1980-07-21 | 1980-07-21 | Detecting device of noise intensity |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5725730A true JPS5725730A (en) | 1982-02-10 |
Family
ID=14281617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10072680A Pending JPS5725730A (en) | 1980-07-21 | 1980-07-21 | Detecting device of noise intensity |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5725730A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6181234U (en) * | 1984-10-31 | 1986-05-29 |
-
1980
- 1980-07-21 JP JP10072680A patent/JPS5725730A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6181234U (en) * | 1984-10-31 | 1986-05-29 |
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