SE439717B - Tonavkodare - Google Patents

Tonavkodare

Info

Publication number: SE439717B
Authority: SE; Sweden
Prior art keywords: signals; signal; frequency; comparing; circuit
Prior art date: 1978-10-06

Application number

SE7902607A

Other languages

English (en)

Swedish (sv)

Other versions

SE7902607L (sv

Inventor

M C J Cowpland

P R Beirne

Original Assignee

Mitel Corp

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.)

1978-10-06

Filing date

1979-03-22

Publication date

1985-06-24

1979-03-22 Application filed by Mitel Corp filed Critical Mitel Corp

1980-04-07 Publication of SE7902607L publication Critical patent/SE7902607L/

1985-06-24 Publication of SE439717B publication Critical patent/SE439717B/sv

Links

238000005070 sampling Methods 0.000 claims description 9
230000011664 signaling Effects 0.000 claims description 4
239000004020 conductor Substances 0.000 description 23
239000003990 capacitor Substances 0.000 description 13
241001494479 Pecora Species 0.000 description 2
230000004913 activation Effects 0.000 description 2
238000006243 chemical reaction Methods 0.000 description 2
238000010586 diagram Methods 0.000 description 2
230000001105 regulatory effect Effects 0.000 description 2
GHIVDTCFLFLOBV-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-acetyloxybenzoate Chemical compound CCN(CC)CCOC(=O)C1=CC=CC=C1OC(C)=O GHIVDTCFLFLOBV-UHFFFAOYSA-N 0.000 description 1
241000428352 Amma Species 0.000 description 1
244000125300 Argania sideroxylon Species 0.000 description 1
241000796533 Arna Species 0.000 description 1
235000017274 Diospyros sandwicensis Nutrition 0.000 description 1
101150112373 LFNG gene Proteins 0.000 description 1
241000282838 Lama Species 0.000 description 1
101100452374 Mus musculus Ikbke gene Proteins 0.000 description 1
241001425800 Pipa Species 0.000 description 1
206010044565 Tremor Diseases 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
230000001174 ascending effect Effects 0.000 description 1
230000005540 biological transmission Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000005669 field effect Effects 0.000 description 1
230000006698 induction Effects 0.000 description 1
230000002045 lasting effect Effects 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
238000000034 method Methods 0.000 description 1
238000012986 modification Methods 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000012544 monitoring process Methods 0.000 description 1
VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
108090000623 proteins and genes Proteins 0.000 description 1
238000009966 trimming Methods 0.000 description 1
239000011701 zinc Substances 0.000 description 1
229910052725 zinc Inorganic materials 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
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Measurement Of Current Or Voltage (AREA)
Networks Using Active Elements (AREA)
Interface Circuits In Exchanges (AREA)
Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Electrophonic Musical Instruments (AREA)
Devices For Supply Of Signal Current (AREA)

SE7902607A 1978-10-06 1979-03-22 Tonavkodare SE439717B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA312,903A CA1112381A (en)	1978-10-06	1978-10-06	Tone decoding circuit

Publications (2)

Publication Number	Publication Date
SE7902607L SE7902607L (sv)	1980-04-07
SE439717B true SE439717B (sv)	1985-06-24

Family

ID=4112559

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7902607A SE439717B (sv)	1978-10-06	1979-03-22	Tonavkodare

Country Status (11)

Country	Link
US (1)	US4273965A (ja)
JP (1)	JPS5585183A (ja)
BE (1)	BE875698A (ja)
CA (1)	CA1112381A (ja)
DE (1)	DE2912566A1 (ja)
DK (1)	DK126479A (ja)
FR (1)	FR2438403B1 (ja)
GB (1)	GB2032151B (ja)
NL (1)	NL7902645A (ja)
NO (1)	NO154210C (ja)
SE (1)	SE439717B (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4604755A (en) *	1984-06-01	1986-08-05	International Business Machines Corp.	Feed forward dual channel automatic level control for dual tone multi-frequency receivers
US4653093A (en) *	1985-07-26	1987-03-24	Floyd Bell Associates, Inc.	Frequency selective ringer circuit
US5095504A (en) *	1987-10-01	1992-03-10	Canon Kabushiki Kaisha	Telephone and telephone system having temporary transfer and hold-release functions
US5699421A (en) *	1995-05-31	1997-12-16	Casio Phonemate, Inc.	Telephone answering device with low cost dual tone multi-frequency detector
JP3452430B2 (ja) *	1995-09-11	2003-09-29	富士通株式会社	情報信号検出装置および情報信号検出方法
CN109709383A (zh) *	2019-03-14	2019-05-03	贵州电网有限责任公司	一种过电压监测装置的触发单元结构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3806664A (en) *	1972-09-13	1974-04-23	Bell Telephone Labor Inc	Tone receiver with detection of each tone in a precise frequency band
US3780230A (en) *	1972-11-10	1973-12-18	Bell Telephone Labor Inc	Multifrequency tone receiver

1978
- 1978-10-06 CA CA312,903A patent/CA1112381A/en not_active Expired
1979
- 1979-02-09 GB GB7904727A patent/GB2032151B/en not_active Expired
- 1979-03-06 NO NO790745A patent/NO154210C/no unknown
- 1979-03-06 JP JP2661279A patent/JPS5585183A/ja active Pending
- 1979-03-22 SE SE7902607A patent/SE439717B/sv not_active IP Right Cessation
- 1979-03-26 US US06/023,999 patent/US4273965A/en not_active Expired - Lifetime
- 1979-03-28 DK DK126479A patent/DK126479A/da not_active Application Discontinuation
- 1979-03-29 DE DE19792912566 patent/DE2912566A1/de not_active Withdrawn
- 1979-04-04 NL NL7902645A patent/NL7902645A/nl not_active Application Discontinuation
- 1979-04-10 FR FR7909684A patent/FR2438403B1/fr not_active Expired
- 1979-04-19 BE BE0/194701A patent/BE875698A/xx not_active IP Right Cessation

Also Published As

Publication number	Publication date
DE2912566A1 (de)	1980-04-24
NL7902645A (nl)	1980-04-09
FR2438403A1 (fr)	1980-04-30
NO154210C (no)	1986-08-13
SE7902607L (sv)	1980-04-07
GB2032151A (en)	1980-04-30
CA1112381A (en)	1981-11-10
DK126479A (da)	1980-04-07
JPS5585183A (en)	1980-06-26
GB2032151B (en)	1983-03-23
US4273965A (en)	1981-06-16
NO790745L (no)	1980-04-09
NO154210B (no)	1986-04-28
FR2438403B1 (fr)	1986-12-12
BE875698A (nl)	1979-08-16

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Legal Events

Date

Code

Title

Description

1995-01-31

NUG

Patent has lapsed

Ref document number: 7902607-6

Effective date: 19890426

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