GB2248353B - Frequency reference circuit - Google Patents

Frequency reference circuit

Info

Publication number
GB2248353B
GB2248353B GB9021259A GB9021259A GB2248353B GB 2248353 B GB2248353 B GB 2248353B GB 9021259 A GB9021259 A GB 9021259A GB 9021259 A GB9021259 A GB 9021259A GB 2248353 B GB2248353 B GB 2248353B
Authority
GB
United Kingdom
Prior art keywords
reference circuit
frequency reference
frequency
circuit
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 - Fee Related
Application number
GB9021259A
Other versions
GB9021259D0 (en
GB2248353A (en
Inventor
Roger James Williamson
Andrew Llewellyn Miles
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.)
Nortel Networks Ltd
STC PLC
Alcatel Submarine Networks UK Ltd
Nortel Networks Optical Components Ltd
Original Assignee
Northern Telecom Ltd
STC PLC
Northern Telecom Europe Ltd
STC Submarine Systems Ltd
STC Ltd
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 Northern Telecom Ltd, STC PLC, Northern Telecom Europe Ltd, STC Submarine Systems Ltd, STC Ltd filed Critical Northern Telecom Ltd
Priority to GB9021259A priority Critical patent/GB2248353B/en
Publication of GB9021259D0 publication Critical patent/GB9021259D0/en
Publication of GB2248353A publication Critical patent/GB2248353A/en
Application granted granted Critical
Publication of GB2248353B publication Critical patent/GB2248353B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • 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
    • H03L7/07—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop using several loops, e.g. for redundant clock signal generation
    • 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
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
    • H03B19/06—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes
    • H03B19/14—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a semiconductor device
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/007—Generation of oscillations based on harmonic frequencies, e.g. overtone oscillators
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0078—Functional aspects of oscillators generating or using signals in quadrature
GB9021259A 1990-09-29 1990-09-29 Frequency reference circuit Expired - Fee Related GB2248353B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9021259A GB2248353B (en) 1990-09-29 1990-09-29 Frequency reference circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9021259A GB2248353B (en) 1990-09-29 1990-09-29 Frequency reference circuit

Publications (3)

Publication Number Publication Date
GB9021259D0 GB9021259D0 (en) 1991-04-03
GB2248353A GB2248353A (en) 1992-04-01
GB2248353B true GB2248353B (en) 1994-04-27

Family

ID=10683005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9021259A Expired - Fee Related GB2248353B (en) 1990-09-29 1990-09-29 Frequency reference circuit

Country Status (1)

Country Link
GB (1) GB2248353B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07235874A (en) * 1994-02-24 1995-09-05 Sony Corp Oscillator, and synthesizer tuner circuit using and am synchronous detection circuit using the oscillator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136627A2 (en) * 1983-10-03 1985-04-10 Quartztronics, Inc. Resonator transducer system with temperature compensation
US4872765A (en) * 1983-04-20 1989-10-10 The United States Of America As Represented By The Secretary Of The Army Dual mode quartz thermometric sensing device
EP0346664A1 (en) * 1988-06-16 1989-12-20 Deutsche Thomson-Brandt GmbH Phase-controlling loop

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872765A (en) * 1983-04-20 1989-10-10 The United States Of America As Represented By The Secretary Of The Army Dual mode quartz thermometric sensing device
EP0136627A2 (en) * 1983-10-03 1985-04-10 Quartztronics, Inc. Resonator transducer system with temperature compensation
EP0346664A1 (en) * 1988-06-16 1989-12-20 Deutsche Thomson-Brandt GmbH Phase-controlling loop

Also Published As

Publication number Publication date
GB9021259D0 (en) 1991-04-03
GB2248353A (en) 1992-04-01

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030929