GB1378818A - Digital tone signal generator - Google Patents

Digital tone signal generator

Info

Publication number
GB1378818A
GB1378818A GB1396572A GB1396572A GB1378818A GB 1378818 A GB1378818 A GB 1378818A GB 1396572 A GB1396572 A GB 1396572A GB 1396572 A GB1396572 A GB 1396572A GB 1378818 A GB1378818 A GB 1378818A
Authority
GB
United Kingdom
Prior art keywords
registers
stage
signal generator
field effect
ones
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
Application number
GB1396572A
Other languages
English (en)
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.)
Boeing North American Inc
Original Assignee
Rockwell International 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.)
Filing date
Publication date
Application filed by Rockwell International Corp filed Critical Rockwell International Corp
Publication of GB1378818A publication Critical patent/GB1378818A/en
Expired legal-status Critical Current

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
    • H04Q1/45—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)
  • Input From Keyboards Or The Like (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB1396572A 1971-08-27 1972-03-24 Digital tone signal generator Expired GB1378818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17552471A 1971-08-27 1971-08-27

Publications (1)

Publication Number Publication Date
GB1378818A true GB1378818A (en) 1974-12-27

Family

ID=22640563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1396572A Expired GB1378818A (en) 1971-08-27 1972-03-24 Digital tone signal generator

Country Status (4)

Country Link
JP (1) JPS535002B2 (enrdf_load_stackoverflow)
BE (1) BE782055A (enrdf_load_stackoverflow)
FR (1) FR2151815A5 (enrdf_load_stackoverflow)
GB (1) GB1378818A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941942A (en) * 1974-01-02 1976-03-02 Motorola, Inc. Two of eight tone encoder
FR2280141A1 (fr) * 1974-07-26 1976-02-20 Materiel Telephonique Systeme de signalisation entre centres de traitement d'informations
US4061886A (en) * 1975-09-29 1977-12-06 Mostek Corporation Dual tone multiple frequency generator
US4087638A (en) * 1976-10-01 1978-05-02 Telaris Telecommunications Inc. DTMF Communication system
JPS53145507A (en) * 1977-05-25 1978-12-18 Fujitsu Ltd Pb signal transmitting system

Also Published As

Publication number Publication date
FR2151815A5 (enrdf_load_stackoverflow) 1973-04-20
BE782055A (fr) 1972-07-31
JPS535002B2 (enrdf_load_stackoverflow) 1978-02-23
JPS4831808A (enrdf_load_stackoverflow) 1973-04-26

Similar Documents

Publication Publication Date Title
GB1414346A (en) Circuit arrangement employing insulated gate field effect transistors
GB1167272A (en) Improvement to Key Generators for Cryptographic Devices
US3046526A (en) scantlin
ES357212A1 (es) Un metodo de producir tonos de una escala temperada de pre-ferencia aproximadamente por igual.
GB1378818A (en) Digital tone signal generator
US4065915A (en) Binary counting system
GB1272687A (en) Counters
US3818441A (en) Key input circuit system for electronic apparatus
FR2282752B1 (enrdf_load_stackoverflow)
GB976995A (en) Control circuit
US4231024A (en) Device for a digital arithmetic processing apparatus
US3962701A (en) Coded counting sequence and logic implementation thereof to drive a display pattern
GB1483068A (en) Circuit comprised of insulated gate field effect transistors
US3970995A (en) Slaving calculator chips
GB1506234A (en) Complementary field effect transistor logic circuits
US3899691A (en) Driving circuits for electronic watches
GB1338983A (en) Electronic watches
JPS6130451B2 (enrdf_load_stackoverflow)
US4187670A (en) Time signal generator circuit for use in an electronic timepiece
US3716725A (en) Ring counter
GB991765A (en) Incremental integrator and differential analyser
US3921384A (en) Digital watch having dual purpose ring counter
US3922568A (en) Driving circuits for electronic watches
GB861509A (enrdf_load_stackoverflow)
US4366396A (en) Semiconductor circuit for transforming sequences of periodic a-c signals

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years