HK1001483A1 - Digital frequency synthesizer having afc and modulation applied to frequency divider - Google Patents

Digital frequency synthesizer having afc and modulation applied to frequency divider Download PDF

Info

Publication number
HK1001483A1
HK1001483A1 HK98100183A HK98100183A HK1001483A1 HK 1001483 A1 HK1001483 A1 HK 1001483A1 HK 98100183 A HK98100183 A HK 98100183A HK 98100183 A HK98100183 A HK 98100183A HK 1001483 A1 HK1001483 A1 HK 1001483A1
Authority
HK
Hong Kong
Prior art keywords
afc
modulation applied
frequency divider
frequency
digital
Prior art date
Application number
HK98100183A
Other languages
English (en)
Chinese (zh)
Other versions
HK1001483B (en
Inventor
Wayne Hietala Alexander
J Marry Patrick
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of HK1001483A1 publication Critical patent/HK1001483A1/xx
Publication of HK1001483B publication Critical patent/HK1001483B/xx

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0933—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop using fractional frequency division in the feedback loop of the phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0925—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop applying frequency modulation at the divider in the feedback loop
    • 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
    • H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
    • 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H03L7/1976—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
HK98100183.0A 1991-05-03 1998-01-09 Digital frequency synthesizer having afc and modulation applied to frequency divider HK1001483B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/695,120 US5111162A (en) 1991-05-03 1991-05-03 Digital frequency synthesizer having AFC and modulation applied to frequency divider
US695120 1991-05-03

Publications (2)

Publication Number Publication Date
HK1001483A1 true HK1001483A1 (en) 1998-06-19
HK1001483B HK1001483B (en) 1998-06-19

Family

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Also Published As

Publication number Publication date
DE4291263C2 (de) 1996-11-21
GB2261780A (en) 1993-05-26
GB9225942D0 (en) 1993-02-24
WO1992020144A1 (en) 1992-11-12
CA2083372C (en) 1998-06-16
GB2261780B (en) 1995-06-28
US5111162A (en) 1992-05-05
CA2083372A1 (en) 1992-11-04
DE4291263T1 (OSRAM) 1993-06-03

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Effective date: 20120405