GB1325621A - Frequency band converter - Google Patents

Frequency band converter

Info

Publication number
GB1325621A
GB1325621A GB1056171A GB1056171A GB1325621A GB 1325621 A GB1325621 A GB 1325621A GB 1056171 A GB1056171 A GB 1056171A GB 1056171 A GB1056171 A GB 1056171A GB 1325621 A GB1325621 A GB 1325621A
Authority
GB
United Kingdom
Prior art keywords
frequency
output
signals
input
feedback
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
GB1056171A
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of GB1325621A publication Critical patent/GB1325621A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing ultrasonic, sonic or infrasonic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
GB1056171A 1970-05-07 1971-04-21 Frequency band converter Expired GB1325621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3537570A 1970-05-07 1970-05-07

Publications (1)

Publication Number Publication Date
GB1325621A true GB1325621A (en) 1973-08-08

Family

ID=21882295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1056171A Expired GB1325621A (en) 1970-05-07 1971-04-21 Frequency band converter

Country Status (7)

Country Link
BE (1) BE766768A (https=)
CA (1) CA961978A (https=)
CH (1) CH546457A (https=)
DE (1) DE2122261B2 (https=)
FR (1) FR2091111A5 (https=)
GB (1) GB1325621A (https=)
NL (1) NL7106153A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2219658C2 (ru) * 2001-02-12 2003-12-20 Поволжская государственная академия телекоммуникаций и информатики Устройство сжатия и восстановления ширины спектра информационных электрических сигналов с ограниченной полосой частот

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342104A (en) * 1979-11-02 1982-07-27 University Court Of The University Of Edinburgh Helium-speech communication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2219658C2 (ru) * 2001-02-12 2003-12-20 Поволжская государственная академия телекоммуникаций и информатики Устройство сжатия и восстановления ширины спектра информационных электрических сигналов с ограниченной полосой частот

Also Published As

Publication number Publication date
FR2091111A5 (https=) 1972-01-14
DE2122261B2 (de) 1975-03-13
CA961978A (en) 1975-01-28
BE766768A (fr) 1971-10-01
DE2122261A1 (de) 1971-11-18
CH546457A (de) 1974-02-28
NL7106153A (https=) 1971-11-09

Similar Documents

Publication Publication Date Title
EP0143539A3 (en) Digital demodulator arrangement for quadrature signals
IE43475L (en) Digital signal generator
JPS5632638B2 (https=)
US4034295A (en) Radio communication system for simultaneous telecommunication between radio stations
GB1325621A (en) Frequency band converter
CA1025127A (en) Pcm tone receiver using optimum statistical technique
CA1022681A (en) Digital arrangement for converting compressed delta-modulated signals into pcm signals
EP0398590A3 (en) Modulator
ES441943A1 (es) Un modem digital que utiliza modulacion delta continuamente variable.
JPS54145415A (en) Hybrid terminal equipment
US4864626A (en) Voice modifier
EP0165014A3 (en) Sampling rate converter for delta modulated signals
JPS527603A (en) Narrow-band transmission system and storing system of audio signal
GB1489367A (en) Apparatus for converting an analogue signal into a pcm signal
JPS56120300A (en) 4 channel pcm recording playback system
JPS5329059A (en) Digital-to-analogue converter circuit
FR2309101A1 (fr) Dispositif de reconnaissance de numerotation dans un reseau telephonique
ES8104683A1 (es) Perfeccionamientos en circuitos de conversion para interfa- sar senales digitales y de modulacion de amplitud de impul- sos (pam) y para modificar de una forma selectiva la senal digital
JPS5776956A (en) Signal system for digital interface
JPS537375A (en) Digital signal conversion circuit
JPS5765016A (en) Station name display device
JPS5342610A (en) Talkie transmission system on digital telephone exchange
JPS56107308A (en) Video recorder
JPS51132801A (en) Sound reproducing method
FR2314618A1 (fr) Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee