GB2285353A - A transmit reference oscillator for satellite communications - Google Patents

A transmit reference oscillator for satellite communications Download PDF

Info

Publication number
GB2285353A
GB2285353A GB9425738A GB9425738A GB2285353A GB 2285353 A GB2285353 A GB 2285353A GB 9425738 A GB9425738 A GB 9425738A GB 9425738 A GB9425738 A GB 9425738A GB 2285353 A GB2285353 A GB 2285353A
Authority
GB
United Kingdom
Prior art keywords
divider
mhz
divide
signals
output
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.)
Withdrawn
Application number
GB9425738A
Other languages
English (en)
Other versions
GB9425738D0 (en
Inventor
Dae Ig Chang
Jeong Ho Kim
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.)
Electronics and Telecommunications Research Institute ETRI
KT Corp
Original Assignee
Electronics and Telecommunications Research Institute ETRI
KT 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 Electronics and Telecommunications Research Institute ETRI, KT Corp filed Critical Electronics and Telecommunications Research Institute ETRI
Publication of GB9425738D0 publication Critical patent/GB9425738D0/en
Publication of GB2285353A publication Critical patent/GB2285353A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/19—Earth-synchronous stations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Radio Relay Systems (AREA)
GB9425738A 1993-12-29 1994-12-20 A transmit reference oscillator for satellite communications Withdrawn GB2285353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930030901A KR960014676B1 (ko) 1993-12-29 1993-12-29 위성통신용 저속 데이타 전용 단말 지구국의 송신 기준주파수 발진기(tro)

Publications (2)

Publication Number Publication Date
GB9425738D0 GB9425738D0 (en) 1995-02-22
GB2285353A true GB2285353A (en) 1995-07-05

Family

ID=19373890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9425738A Withdrawn GB2285353A (en) 1993-12-29 1994-12-20 A transmit reference oscillator for satellite communications

Country Status (5)

Country Link
JP (1) JPH07273644A (ko)
KR (1) KR960014676B1 (ko)
CA (1) CA2139191A1 (ko)
DE (1) DE4447142A1 (ko)
GB (1) GB2285353A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7796024B2 (en) 2007-02-07 2010-09-14 Db Systems, Llc Automated multi-purpose alert system with sensory interrupts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932821A (en) * 1974-11-08 1976-01-13 Narco Scientific Industries, Inc. Out of lock detector for phase lock loop synthesizer
GB2003300A (en) * 1977-08-22 1979-03-07 Rca Corp Time interval control apparatus
GB2118382A (en) * 1981-12-22 1983-10-26 Sony Corp Tuning apparatus of phase-locked loop type
EP0186854A2 (en) * 1984-12-28 1986-07-09 Fujitsu Limited Frequency synthesizer having means for suppressing frequency instability caused by intermittent PLL operation
GB2258096A (en) * 1991-07-24 1993-01-27 Matsushita Electric Ind Co Ltd Clock changeover apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107920A (ja) * 1983-11-16 1985-06-13 Toshiba Corp 位相同期回路を用いた通信機器
JPH01256224A (ja) * 1988-04-05 1989-10-12 Fujitsu Ltd シンセチャンネル検出回路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932821A (en) * 1974-11-08 1976-01-13 Narco Scientific Industries, Inc. Out of lock detector for phase lock loop synthesizer
GB2003300A (en) * 1977-08-22 1979-03-07 Rca Corp Time interval control apparatus
GB2118382A (en) * 1981-12-22 1983-10-26 Sony Corp Tuning apparatus of phase-locked loop type
EP0186854A2 (en) * 1984-12-28 1986-07-09 Fujitsu Limited Frequency synthesizer having means for suppressing frequency instability caused by intermittent PLL operation
GB2258096A (en) * 1991-07-24 1993-01-27 Matsushita Electric Ind Co Ltd Clock changeover apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7796024B2 (en) 2007-02-07 2010-09-14 Db Systems, Llc Automated multi-purpose alert system with sensory interrupts

Also Published As

Publication number Publication date
DE4447142A1 (de) 1995-07-06
KR960014676B1 (ko) 1996-10-19
CA2139191A1 (en) 1995-06-30
GB9425738D0 (en) 1995-02-22
JPH07273644A (ja) 1995-10-20
KR950022254A (ko) 1995-07-28

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)