GB2290184B - A low-frequency synthesizer - Google Patents

A low-frequency synthesizer

Info

Publication number
GB2290184B
GB2290184B GB9515008A GB9515008A GB2290184B GB 2290184 B GB2290184 B GB 2290184B GB 9515008 A GB9515008 A GB 9515008A GB 9515008 A GB9515008 A GB 9515008A GB 2290184 B GB2290184 B GB 2290184B
Authority
GB
United Kingdom
Prior art keywords
low
frequency synthesizer
synthesizer
frequency
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
GB9515008A
Other versions
GB2290184A (en
GB9515008D0 (en
Inventor
Stanley E Jaffe
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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
Priority claimed from US07/739,592 external-priority patent/US5130670A/en
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB9515008D0 publication Critical patent/GB9515008D0/en
Publication of GB2290184A publication Critical patent/GB2290184A/en
Application granted granted Critical
Publication of GB2290184B publication Critical patent/GB2290184B/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
    • H03B23/00—Generation of oscillations periodically swept over a predetermined frequency range
    • 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
    • H03B2200/0092—Measures to linearise or reduce distortion of oscillator characteristics
    • 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
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/0225—Varying the frequency of the oscillations by electronic means the means being associated with an element comprising distributed inductances and capacitances
    • H03B2201/0241—Varying the frequency of the oscillations by electronic means the means being associated with an element comprising distributed inductances and capacitances the element being a magnetically variable element, e.g. an Yttrium Iron Garnet
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/18—Angle modulation by means of variable impedance by means of a variable reactive element the element being a current-dependent inductor
GB9515008A 1991-08-01 1992-07-21 A low-frequency synthesizer Expired - Fee Related GB2290184B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/739,592 US5130670A (en) 1991-08-01 1991-08-01 Phase-locking circuit for swept synthesized source preferably having stability enhancement circuit
GB9215508A GB2258354B (en) 1991-08-01 1992-07-21 Phase-locking circuit for swept synthesized source preferably having stability enhancement circuit

Publications (3)

Publication Number Publication Date
GB9515008D0 GB9515008D0 (en) 1995-09-20
GB2290184A GB2290184A (en) 1995-12-13
GB2290184B true GB2290184B (en) 1996-03-06

Family

ID=26301294

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9515008A Expired - Fee Related GB2290184B (en) 1991-08-01 1992-07-21 A low-frequency synthesizer
GB9515009A Expired - Fee Related GB2290185B (en) 1991-08-01 1992-07-21 A pretune calibration method used in a frequency synthesizer

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9515009A Expired - Fee Related GB2290185B (en) 1991-08-01 1992-07-21 A pretune calibration method used in a frequency synthesizer

Country Status (1)

Country Link
GB (2) GB2290184B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701306A1 (en) * 1997-01-16 1998-07-23 Daimler Benz Aerospace Ag Method for frequency stabilization of a YIG oscillator
DE19716776A1 (en) * 1997-04-22 1998-10-29 Daimler Benz Aerospace Ag Method and arrangement for locking a YIG oscillator

Also Published As

Publication number Publication date
GB9515009D0 (en) 1995-09-20
GB2290184A (en) 1995-12-13
GB9515008D0 (en) 1995-09-20
GB2290185B (en) 1996-03-06
GB2290185A (en) 1995-12-13

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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)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070721