JPS57131135A - Power line carrier type interphone device - Google Patents
Power line carrier type interphone deviceInfo
- Publication number
- JPS57131135A JPS57131135A JP1669281A JP1669281A JPS57131135A JP S57131135 A JPS57131135 A JP S57131135A JP 1669281 A JP1669281 A JP 1669281A JP 1669281 A JP1669281 A JP 1669281A JP S57131135 A JPS57131135 A JP S57131135A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmitting
- circuit
- receiving
- discriminating
- 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
- 230000005236 sound signal Effects 0.000 abstract 3
- 230000007257 malfunction Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/005—Control by a pilot signal
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1669281A JPS57131135A (en) | 1981-02-06 | 1981-02-06 | Power line carrier type interphone device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1669281A JPS57131135A (en) | 1981-02-06 | 1981-02-06 | Power line carrier type interphone device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57131135A true JPS57131135A (en) | 1982-08-13 |
Family
ID=11923348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1669281A Pending JPS57131135A (en) | 1981-02-06 | 1981-02-06 | Power line carrier type interphone device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57131135A (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01162962U (ja) * | 1989-05-06 | 1989-11-14 | ||
CN105763227A (zh) * | 2016-04-15 | 2016-07-13 | 贵州大学 | 用于测控系统的电力载波装置的发送接收滤波及耦合电路 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS42341Y1 (ja) * | 1966-04-22 | 1967-01-11 | ||
JPS4929505A (ja) * | 1972-07-14 | 1974-03-16 |
-
1981
- 1981-02-06 JP JP1669281A patent/JPS57131135A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS42341Y1 (ja) * | 1966-04-22 | 1967-01-11 | ||
JPS4929505A (ja) * | 1972-07-14 | 1974-03-16 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01162962U (ja) * | 1989-05-06 | 1989-11-14 | ||
CN105763227A (zh) * | 2016-04-15 | 2016-07-13 | 贵州大学 | 用于测控系统的电力载波装置的发送接收滤波及耦合电路 |
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