DE3814727C2 - - Google Patents
Info
- Publication number
- DE3814727C2 DE3814727C2 DE19883814727 DE3814727A DE3814727C2 DE 3814727 C2 DE3814727 C2 DE 3814727C2 DE 19883814727 DE19883814727 DE 19883814727 DE 3814727 A DE3814727 A DE 3814727A DE 3814727 C2 DE3814727 C2 DE 3814727C2
- Authority
- DE
- Germany
- Prior art keywords
- multiplier
- integrator
- mfc
- pcm
- memory
- 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.)
- Expired
Links
- 230000010354 integration Effects 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 230000011664 signaling Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Time-Division Multiplex Systems (AREA)
- Complex Calculations (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD30404987A DD266253A3 (de) | 1987-06-22 | 1987-06-22 | Universeller digitaler mfc-empfaenger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3814727A1 DE3814727A1 (de) | 1989-01-05 |
| DE3814727C2 true DE3814727C2 (enrdf_load_stackoverflow) | 1989-08-10 |
Family
ID=5590012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19883814727 Granted DE3814727A1 (de) | 1987-06-22 | 1988-04-30 | Universeller digitaler mfc-empfaenger |
Country Status (4)
| Country | Link |
|---|---|
| CS (1) | CS372688A1 (enrdf_load_stackoverflow) |
| DD (1) | DD266253A3 (enrdf_load_stackoverflow) |
| DE (1) | DE3814727A1 (enrdf_load_stackoverflow) |
| HU (1) | HUT49975A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1289281C (en) * | 1988-05-05 | 1991-09-17 | Jerry Stroobach | Digital dtmf tone detector |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2295665A1 (fr) * | 1974-12-18 | 1976-07-16 | Labo Cent Telecommunicat | Recepteur numerique de signaux multifrequences |
| CH601954A5 (enrdf_load_stackoverflow) * | 1975-06-27 | 1978-07-14 | Siemens Ag Albis | |
| DE2712831B2 (de) * | 1977-03-23 | 1980-01-24 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Sprachgeschützter frequenzselektiver Zeichenempfänger |
| DE2712847C3 (de) * | 1977-03-23 | 1979-12-06 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Sprachgeschützter frequenzselektiver Zeichenempfänger |
| DE2719248C2 (de) * | 1977-04-29 | 1983-04-07 | Siemens AG, 1000 Berlin und 8000 München | Frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen |
-
1987
- 1987-06-22 DD DD30404987A patent/DD266253A3/de not_active IP Right Cessation
-
1988
- 1988-04-30 DE DE19883814727 patent/DE3814727A1/de active Granted
- 1988-05-27 HU HU270488A patent/HUT49975A/hu unknown
- 1988-05-31 CS CS883726A patent/CS372688A1/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DD266253A3 (de) | 1989-03-29 |
| CS372688A1 (en) | 1990-06-13 |
| HUT49975A (en) | 1989-11-28 |
| DE3814727A1 (de) | 1989-01-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |