IT1066489B - DUPLICATION CIRCUIT WITH ATTACHMENT OF FREQUENCY USING A FREQUENCY DIFFERENCE DETECTOR CONTROLLED BY DOOR - Google Patents

DUPLICATION CIRCUIT WITH ATTACHMENT OF FREQUENCY USING A FREQUENCY DIFFERENCE DETECTOR CONTROLLED BY DOOR

Info

Publication number
IT1066489B
IT1066489B IT49738/74A IT4973874A IT1066489B IT 1066489 B IT1066489 B IT 1066489B IT 49738/74 A IT49738/74 A IT 49738/74A IT 4973874 A IT4973874 A IT 4973874A IT 1066489 B IT1066489 B IT 1066489B
Authority
IT
Italy
Prior art keywords
frequency
door
attachment
difference detector
duplication circuit
Prior art date
Application number
IT49738/74A
Other languages
Italian (it)
Original Assignee
Int Standard Electric 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of IT1066489B publication Critical patent/IT1066489B/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
    • H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
    • 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
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
IT49738/74A 1973-03-21 1974-03-27 DUPLICATION CIRCUIT WITH ATTACHMENT OF FREQUENCY USING A FREQUENCY DIFFERENCE DETECTOR CONTROLLED BY DOOR IT1066489B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US342121A US3863156A (en) 1973-03-21 1973-03-21 Frequency lock loop employing a gated frequency difference detector

Publications (1)

Publication Number Publication Date
IT1066489B true IT1066489B (en) 1985-03-12

Family

ID=23340424

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49738/74A IT1066489B (en) 1973-03-21 1974-03-27 DUPLICATION CIRCUIT WITH ATTACHMENT OF FREQUENCY USING A FREQUENCY DIFFERENCE DETECTOR CONTROLLED BY DOOR

Country Status (3)

Country Link
US (1) US3863156A (en)
FR (1) FR2222792B3 (en)
IT (1) IT1066489B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944940A (en) * 1974-09-06 1976-03-16 Pertec Corporation Versatile phase-locked loop for read data recovery
US3934205A (en) * 1975-01-27 1976-01-20 International Telephone And Telegraph Corporation Frequency lock loop employing a gated frequency difference detector having positive, zero and negative threshold detectors
US4015083A (en) * 1975-08-25 1977-03-29 Bell Telephone Laboratories, Incorporated Timing recovery circuit for digital data
US4123716A (en) * 1976-08-12 1978-10-31 The Magnavox Company Automatic frequency control for digital tuning systems
GB2124840A (en) * 1982-07-02 1984-02-22 Philips Electronic Associated Data demodulator for digital signals
US5396521A (en) * 1992-10-19 1995-03-07 Nec Corporation Receiver capable of reducing power consumption in a PLL circuit
US5394444A (en) * 1993-07-12 1995-02-28 Motorola, Inc. Lock detect circuit for detecting a lock condition in a phase locked loop and method therefor
US6020765A (en) * 1997-05-30 2000-02-01 Sun Microsystems, Inc. Frequency difference detector for use with an NRZ signal
US7157942B2 (en) * 2004-12-08 2007-01-02 Seiko Epson Corporation Digital frequency difference detector with inherent low pass filtering and lock detection
US7346793B2 (en) * 2005-02-10 2008-03-18 Northrop Grumman Corporation Synchronization of multiple operational flight programs
FR3141253A1 (en) * 2022-10-24 2024-04-26 Stmicroelectronics Sa I and Q signal detection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403355A (en) * 1966-01-12 1968-09-24 Fujitsu Ltd Phase control circuit
US3646446A (en) * 1969-11-12 1972-02-29 Us Army Binary information receiver for detecting a phase modulated carrier signal
US3701948A (en) * 1970-09-17 1972-10-31 North American Rockwell System for phase locking on a virtual carrier
US3739081A (en) * 1970-12-28 1973-06-12 Tektronix Inc Method and apparatus for color subcarrier generation

Also Published As

Publication number Publication date
FR2222792A1 (en) 1974-10-18
FR2222792B3 (en) 1976-12-31
US3863156A (en) 1975-01-28

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