CA2139191A1 - Oscillateur de reference pour emetteur de station terminale a antenne a petite ouverture de systeme de communication a satellites - Google Patents

Oscillateur de reference pour emetteur de station terminale a antenne a petite ouverture de systeme de communication a satellites

Info

Publication number
CA2139191A1
CA2139191A1 CA002139191A CA2139191A CA2139191A1 CA 2139191 A1 CA2139191 A1 CA 2139191A1 CA 002139191 A CA002139191 A CA 002139191A CA 2139191 A CA2139191 A CA 2139191A CA 2139191 A1 CA2139191 A1 CA 2139191A1
Authority
CA
Canada
Prior art keywords
divider
signals
mhz
voltage controlled
controlled oscillator
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.)
Abandoned
Application number
CA002139191A
Other languages
English (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.)
KOREA TELECOMMMUNICATION AUTHORITY
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2139191A1 publication Critical patent/CA2139191A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)
CA002139191A 1993-12-29 1994-12-28 Oscillateur de reference pour emetteur de station terminale a antenne a petite ouverture de systeme de communication a satellites Abandoned CA2139191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1993-30901 1993-12-29
KR1019930030901A KR960014676B1 (ko) 1993-12-29 1993-12-29 위성통신용 저속 데이타 전용 단말 지구국의 송신 기준주파수 발진기(tro)

Publications (1)

Publication Number Publication Date
CA2139191A1 true CA2139191A1 (fr) 1995-06-30

Family

ID=19373890

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002139191A Abandoned CA2139191A1 (fr) 1993-12-29 1994-12-28 Oscillateur de reference pour emetteur de station terminale a antenne a petite ouverture de systeme de communication a satellites

Country Status (5)

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

Families Citing this family (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

Family Cites Families (7)

* 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
US4182994A (en) * 1977-08-22 1980-01-08 Rca Corporation Phase locked loop tuning system including stabilized time interval control circuit
JPS58107715A (ja) * 1981-12-22 1983-06-27 Sony Corp 選局装置
JPS60107920A (ja) * 1983-11-16 1985-06-13 Toshiba Corp 位相同期回路を用いた通信機器
JPS61157028A (ja) * 1984-12-28 1986-07-16 Fujitsu Ltd 周波数シンセサイザ
JPH01256224A (ja) * 1988-04-05 1989-10-12 Fujitsu Ltd シンセチャンネル検出回路
JPH0529932A (ja) * 1991-07-24 1993-02-05 Matsushita Electric Ind Co Ltd クロツク切り換え装置

Also Published As

Publication number Publication date
DE4447142A1 (de) 1995-07-06
GB9425738D0 (en) 1995-02-22
KR950022254A (ko) 1995-07-28
KR960014676B1 (ko) 1996-10-19
JPH07273644A (ja) 1995-10-20
GB2285353A (en) 1995-07-05

Similar Documents

Publication Publication Date Title
EP0717491B1 (fr) Synthétiseur haute précision et bruit de phase bas comprenant un modulateur vectoriel
US5301367A (en) Direct digital synthesizer for producing a modulated intermediate frequency in a radio apparatus
US5353311A (en) Radio transmitter
US4319358A (en) Information transmission
US5963100A (en) Frequency synthesizer having a speed-up circuit
US5610559A (en) Dual loop frequency synthesizer having fractional dividers
US6366620B1 (en) VSAT system
US6665523B1 (en) Receiver tuning system
EP0733280A1 (fr) Modulateur de phase/frequence
US7915935B1 (en) Communication systems w/counter-based frequency centering for mm-wave frequency bands
US5940457A (en) Millimeter-wave (MMW) synthesizer with FSK modulation transmitter
JPH0151100B2 (fr)
KR100997491B1 (ko) 오프셋 위상동기루프를 사용하는 통신 송신기
US5603099A (en) Transceiver for preventing the degradation of reception sensitivity and modulation accuracy of a transmitted signal when an external reference signal incorporates noise
US4162447A (en) Frequency synthesis method for an AM-SSB transmitter-receiver
CA2139191A1 (fr) Oscillateur de reference pour emetteur de station terminale a antenne a petite ouverture de systeme de communication a satellites
US4097816A (en) Tuning system
US4095190A (en) Tuning system
JPH09186587A (ja) Ｐｌｌ回路
JPH07327058A (ja) 衛星通信受信装置
US20050089119A1 (en) Receiver
WO1985002734A1 (fr) Emetteur-recepteur de communication duplex avec annulation de modulation
US6163229A (en) Frequency generator for generating two independent FSK signals
JP2929849B2 (ja) 送受信周波数変換器
JPH04245814A (ja) Ｆｍ送信回路

Legal Events

Date Code Title Description
FZDE Dead