JPS5469906A - Analog-to-digital converter circuit - Google Patents
Analog-to-digital converter circuitInfo
- Publication number
- JPS5469906A JPS5469906A JP13715777A JP13715777A JPS5469906A JP S5469906 A JPS5469906 A JP S5469906A JP 13715777 A JP13715777 A JP 13715777A JP 13715777 A JP13715777 A JP 13715777A JP S5469906 A JPS5469906 A JP S5469906A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- wire
- analog
- subscriber
- converter
- 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
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
PURPOSE:To obtain a converter circuit including two wire-four wire conversion used for a time-division switching unit which can prevent the generation of a ringing tone, by stopping the clock of an analog-to-digital modem circuit interlocking with the DC loop disconnection at the two-wire side. CONSTITUTION:Signals sent from telephone set 1 are supplied, by way of two wire-four wire converter circuit 42 with subscriber's circuit 3 and balancing connection network 41 and level converter circuit 42, to modulator circuit 43, where they are converted into digital signals before transmitted to time-division channel 5 via register 44. The received signals, on the other hand, are supplied via register 44' to demodulator 45, where they are converted into analog signals, and they are supplied to converter 40 via level converter 42'. Subscriber DC loop detection circuit 30 in subscriber's circuit 3 controls clock stop circuit 46 through the disconnection of the DC loop, thereby stopping the supply of clock 47 to modulator 43 and demodulator 45.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13715777A JPS5469906A (en) | 1977-11-15 | 1977-11-15 | Analog-to-digital converter circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13715777A JPS5469906A (en) | 1977-11-15 | 1977-11-15 | Analog-to-digital converter circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5469906A true JPS5469906A (en) | 1979-06-05 |
JPS5722506B2 JPS5722506B2 (en) | 1982-05-13 |
Family
ID=15192143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13715777A Granted JPS5469906A (en) | 1977-11-15 | 1977-11-15 | Analog-to-digital converter circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5469906A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111394A (en) * | 1979-12-13 | 1981-09-03 | Standard Telephones Cables Ltd | Subscriber channel interface |
JPS59183593A (en) * | 1983-04-01 | 1984-10-18 | Iwatsu Electric Co Ltd | Subscriber circuit of exchange |
JPS60247394A (en) * | 1984-05-23 | 1985-12-07 | Nec Corp | Subscriber's circuit |
JPS61101191A (en) * | 1984-10-24 | 1986-05-20 | Oki Electric Ind Co Ltd | Line interface circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0320323Y2 (en) * | 1986-03-26 | 1991-05-01 |
-
1977
- 1977-11-15 JP JP13715777A patent/JPS5469906A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56111394A (en) * | 1979-12-13 | 1981-09-03 | Standard Telephones Cables Ltd | Subscriber channel interface |
JPS59183593A (en) * | 1983-04-01 | 1984-10-18 | Iwatsu Electric Co Ltd | Subscriber circuit of exchange |
JPH0218798B2 (en) * | 1983-04-01 | 1990-04-26 | Iwatsu Electric Co Ltd | |
JPS60247394A (en) * | 1984-05-23 | 1985-12-07 | Nec Corp | Subscriber's circuit |
JPS61101191A (en) * | 1984-10-24 | 1986-05-20 | Oki Electric Ind Co Ltd | Line interface circuit |
JPH0697794B2 (en) * | 1984-10-24 | 1994-11-30 | 沖電気工業株式会社 | Line interface circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS5722506B2 (en) | 1982-05-13 |
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