GB1390232A - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
GB1390232A
GB1390232A GB1290572A GB1290572A GB1390232A GB 1390232 A GB1390232 A GB 1390232A GB 1290572 A GB1290572 A GB 1290572A GB 1290572 A GB1290572 A GB 1290572A GB 1390232 A GB1390232 A GB 1390232A
Authority
GB
United Kingdom
Prior art keywords
frequency synthesizer
division
frequency
coder
heading
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
GB1290572A
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.)
COMMUNICATION ASSOCIATES Inc
Original Assignee
COMMUNICATION ASSOCIATES 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 COMMUNICATION ASSOCIATES Inc filed Critical COMMUNICATION ASSOCIATES Inc
Priority to GB1290572A priority Critical patent/GB1390232A/en
Publication of GB1390232A publication Critical patent/GB1390232A/en
Expired 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
    • H03L7/187—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 using means for coarse tuning the voltage controlled oscillator of the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
    • H03L2207/06—Phase locked loops with a controlled oscillator having at least two frequency control terminals

Landscapes

  • Numerical Control (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

1390232 Code conversions COMMUNICATION ASSOCIATES Inc 20 March 1972 12905/72 Heading G4H [Also in Division H3] In a frequency synthesizer (see also Division H3), a coder for converting the decade number of a frequency into its equivalent nines complement number in binary coded decimal form comprises a set of NAND gates such as 27-30 which may be in integrated circuit form.
GB1290572A 1972-03-20 1972-03-20 Frequency synthesizer Expired GB1390232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1290572A GB1390232A (en) 1972-03-20 1972-03-20 Frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1290572A GB1390232A (en) 1972-03-20 1972-03-20 Frequency synthesizer

Publications (1)

Publication Number Publication Date
GB1390232A true GB1390232A (en) 1975-04-09

Family

ID=10013291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290572A Expired GB1390232A (en) 1972-03-20 1972-03-20 Frequency synthesizer

Country Status (1)

Country Link
GB (1) GB1390232A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232155A1 (en) * 1981-09-01 1983-03-17 Tektronix, Inc., 97077 Beaverton, Oreg. PHASE DETECTING CIRCUIT
EP0319218A2 (en) * 1987-12-01 1989-06-07 Matsushita Electric Industrial Co., Ltd. Data reproducing apparatus
EP0395109A1 (en) * 1989-04-28 1990-10-31 Alcatel Telspace Arrangement for automatic tuning of a voltage controlled oscillator of a PLL

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232155A1 (en) * 1981-09-01 1983-03-17 Tektronix, Inc., 97077 Beaverton, Oreg. PHASE DETECTING CIRCUIT
EP0319218A2 (en) * 1987-12-01 1989-06-07 Matsushita Electric Industrial Co., Ltd. Data reproducing apparatus
EP0319218A3 (en) * 1987-12-01 1991-07-17 Matsushita Electric Industrial Co., Ltd. Data reproducing apparatus
EP0395109A1 (en) * 1989-04-28 1990-10-31 Alcatel Telspace Arrangement for automatic tuning of a voltage controlled oscillator of a PLL
FR2646573A1 (en) * 1989-04-28 1990-11-02 Alcatel Transmission AUTOMATIC OSCILLATOR TUNING DEVICE CONTROLLING VOLTAGE OF PHASE LOCK LOOP
AU625702B2 (en) * 1989-04-28 1992-07-16 Alcatel N.V. Automatic tuning device for voltage-controlled oscillator fitted to a phase-locked loop

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Legal Events

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