JPS57211891A - Tone detector - Google Patents
Tone detectorInfo
- Publication number
- JPS57211891A JPS57211891A JP9662381A JP9662381A JPS57211891A JP S57211891 A JPS57211891 A JP S57211891A JP 9662381 A JP9662381 A JP 9662381A JP 9662381 A JP9662381 A JP 9662381A JP S57211891 A JPS57211891 A JP S57211891A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- timing circuit
- level
- tone
- output
- 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
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9662381A JPS57211891A (en) | 1981-06-24 | 1981-06-24 | Tone detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9662381A JPS57211891A (en) | 1981-06-24 | 1981-06-24 | Tone detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57211891A true JPS57211891A (en) | 1982-12-25 |
Family
ID=14169963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9662381A Pending JPS57211891A (en) | 1981-06-24 | 1981-06-24 | Tone detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57211891A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63196146A (ja) * | 1987-02-10 | 1988-08-15 | Anritsu Corp | 信号受信装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5522406B2 (ja) * | 1972-11-24 | 1980-06-17 |
-
1981
- 1981-06-24 JP JP9662381A patent/JPS57211891A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5522406B2 (ja) * | 1972-11-24 | 1980-06-17 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63196146A (ja) * | 1987-02-10 | 1988-08-15 | Anritsu Corp | 信号受信装置 |
JPH0517736B2 (ja) * | 1987-02-10 | 1993-03-10 | Anritsu Corp |
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