JPS512305A - - Google Patents

Info

Publication number: JPS512305A
Authority: JP; Japan
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

Application number

JP50004189A

Inventor

Gaasu Natsushu Harorudo

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Motorola Solutions Inc

Original Assignee

Motorola Inc

Priority date (The priority date 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 date listed.)

1974-01-02

Filing date

1974-12-28

Publication date

1976-01-09

1974-12-28 Application filed by Motorola Inc filed Critical Motorola Inc

1976-01-09 Publication of JPS512305A publication Critical patent/JPS512305A/ja

Status Pending legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
- H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Telephone Function (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Mobile Radio Communication Systems (AREA)
Complex Calculations (AREA)

JP50004189A 1974-01-02 1974-12-28 Pending JPS512305A (ja)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/430,377 US3941942A (en)	1974-01-02	1974-01-02	Two of eight tone encoder

Publications (1)

Publication Number	Publication Date
JPS512305A true JPS512305A (ja)	1976-01-09

Family

ID=23707302

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
JP50004189A Pending JPS512305A (ja)	1974-01-02	1974-12-28
JP1980053270U Pending JPS55152747U (ja)	1974-01-02	1980-04-21

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
JP1980053270U Pending JPS55152747U (ja)	1974-01-02	1980-04-21

Country Status (5)

Country	Link
US (1)	US3941942A (ja)
JP (2)	JPS512305A (ja)
DE (1)	DE2500059C3 (ja)
FR (1)	FR2256609B1 (ja)
GB (1)	GB1433586A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS57127513A (en) *	1981-01-30	1982-08-07	Nippon Kokan Kk <Nkk>	Zero point adjusting method for roll gap of steel shapes rolling mill
JPS5981957A (ja) *	1982-11-02	1984-05-11	Nippon Telegr & Teleph Corp <Ntt>	デイジタル式電話端末装置用２周波信号発振器
JPS61258553A (ja) *	1985-05-13	1986-11-15	Ricoh Co Ltd	周波数信号発生装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4061886A (en) *	1975-09-29	1977-12-06	Mostek Corporation	Dual tone multiple frequency generator
DE2924752C2 (de) *	1979-06-20	1984-02-02	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Tongenerator zur Erzeugung von Signalisierungsfrequenzen in einem MFV-Fernsprechapparat
US4270028A (en) *	1979-09-24	1981-05-26	Gte Automatic Electric Laboratories Incorporated	Digitally activated ringing circuit for generation of AC voltages
DE3114062A1 (de) *	1981-04-07	1982-10-28	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Schaltungsanordnung zur taktumsetzung
US4472601A (en) *	1982-07-14	1984-09-18	Rca Corporation	Control circuit for telephone receiver and transmitter
FR2534756A1 (fr) *	1982-10-13	1984-04-20	Telephonie Ind Commerciale	Circuit generateur de signalisation multifrequence en association avec un microprocesseur, notamment pour poste telephonique
GB2177862B (en) *	1985-07-09	1989-07-19	Motorola Inc	Waveform generators
US5802112A (en) *	1996-01-16	1998-09-01	Transcendat Inc.	Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission
US6038262A (en) *	1998-06-09	2000-03-14	Transcendata, Inc.	Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4831808A (ja) *	1971-08-27	1973-04-26

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1496141A (fr) *	1966-06-03	1967-09-29	Cit Alcatel	Générateur d'ondes modulées en fréquence
FR1569618A (ja) *	1967-12-08	1969-06-06
US3778556A (en) *	1971-07-02	1973-12-11	Telecommunications Techn Inc	Telephone signaling and testing apparatus with provisions for either pulse or multifrequency dialing
US3778557A (en) *	1972-03-22	1973-12-11	Post Corp	Encoder
US3787836A (en) *	1972-06-15	1974-01-22	Bell Telephone Labor Inc	Multitone telephone dialing circuit employing digital-to-analog tone synthesis

1974
- 1974-01-02 US US05/430,377 patent/US3941942A/en not_active Expired - Lifetime
- 1974-12-18 GB GB5474574A patent/GB1433586A/en not_active Expired
- 1974-12-28 JP JP50004189A patent/JPS512305A/ja active Pending
1975
- 1975-01-02 FR FR7500055A patent/FR2256609B1/fr not_active Expired
- 1975-01-02 DE DE2500059A patent/DE2500059C3/de not_active Expired
1980
- 1980-04-21 JP JP1980053270U patent/JPS55152747U/ja active Pending

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4831808A (ja) *	1971-08-27	1973-04-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS57127513A (en) *	1981-01-30	1982-08-07	Nippon Kokan Kk <Nkk>	Zero point adjusting method for roll gap of steel shapes rolling mill
JPS6349567B2 (ja) *	1981-01-30	1988-10-05	Nippon Kokan Kk
JPS5981957A (ja) *	1982-11-02	1984-05-11	Nippon Telegr & Teleph Corp <Ntt>	デイジタル式電話端末装置用２周波信号発振器
JPS61258553A (ja) *	1985-05-13	1986-11-15	Ricoh Co Ltd	周波数信号発生装置

Also Published As

Publication number	Publication date
DE2500059B2 (de)	1979-01-04
FR2256609B1 (ja)	1979-10-12
DE2500059A1 (de)	1975-09-18
US3941942A (en)	1976-03-02
JPS55152747U (ja)	1980-11-04
GB1433586A (en)	1976-04-28
DE2500059C3 (de)	1981-08-13
FR2256609A1 (ja)	1975-07-25

Publication	Publication Date	Title
JPS55152747U (ja)	1980-11-04
AU7462274A (ja)	1976-04-29
AR199810A1 (ja)	1974-09-30
AU7465674A (ja)	1976-04-29
AR198841Q (ja)	1974-07-24
BG20444A1 (ja)	1975-12-20
BG19702A1 (ja)	1975-10-10
AU479870A (ja)	1975-11-20
AU480660A (ja)	1975-12-18
AU480723A (ja)	1975-11-27
AU481024A (ja)	1976-05-13
AU481375A (ja)	1975-10-16
AU481479A (ja)	1975-09-25
AU481898A (ja)	1974-08-15
AU481934A (ja)	1975-12-18
AU482369A (ja)	1975-12-11
BE829575A (ja)	1975-11-28
BE830202A (ja)	1975-10-01
BG20851A1 (ja)	1976-01-20
BG19643A1 (ja)	1975-10-10
BG20744A1 (ja)	1975-12-20
BG20054A1 (ja)	1975-10-30
BG20162A1 (ja)	1975-11-05
BG20221A1 (ja)	1975-11-05
BG21508A1 (ja)	1976-07-20