GB2236616B - Crystal frequency adjustment - Google Patents

Crystal frequency adjustment

Info

Publication number
GB2236616B
GB2236616B GB8922310A GB8922310A GB2236616B GB 2236616 B GB2236616 B GB 2236616B GB 8922310 A GB8922310 A GB 8922310A GB 8922310 A GB8922310 A GB 8922310A GB 2236616 B GB2236616 B GB 2236616B
Authority
GB
United Kingdom
Prior art keywords
frequency adjustment
crystal frequency
crystal
adjustment
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
GB8922310A
Other versions
GB2236616A (en
GB8922310D0 (en
Inventor
Roger James Williamson
Stephen Rolt
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.)
STC PLC
Nortel Networks Optical Components Ltd
Original Assignee
STC PLC
Northern Telecom Europe 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 STC PLC, Northern Telecom Europe Ltd filed Critical STC PLC
Priority to GB8922310A priority Critical patent/GB2236616B/en
Publication of GB8922310D0 publication Critical patent/GB8922310D0/en
Publication of GB2236616A publication Critical patent/GB2236616A/en
Application granted granted Critical
Publication of GB2236616B publication Critical patent/GB2236616B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
    • H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
GB8922310A 1989-10-04 1989-10-04 Crystal frequency adjustment Expired - Fee Related GB2236616B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8922310A GB2236616B (en) 1989-10-04 1989-10-04 Crystal frequency adjustment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8922310A GB2236616B (en) 1989-10-04 1989-10-04 Crystal frequency adjustment

Publications (3)

Publication Number Publication Date
GB8922310D0 GB8922310D0 (en) 1989-11-22
GB2236616A GB2236616A (en) 1991-04-10
GB2236616B true GB2236616B (en) 1993-03-31

Family

ID=10664009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8922310A Expired - Fee Related GB2236616B (en) 1989-10-04 1989-10-04 Crystal frequency adjustment

Country Status (1)

Country Link
GB (1) GB2236616B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB914814A (en) * 1958-06-26 1963-01-02 Kristall Verarbeitung Neckarbi Improvements in or relating to the frequency trimming of piezo-electric resonator units
GB1218721A (en) * 1968-01-16 1971-01-13 Thomson Csf Improved method for adjusting a crystal oscillator
US4454639A (en) * 1982-06-03 1984-06-19 Motorola, Inc. Method for tuning piezoelectric resonators
GB2199985A (en) * 1986-12-22 1988-07-20 Raytheon Co Surface acoustic wave device
US5035202A (en) * 1989-04-13 1991-07-30 Matsushita Electric Industrial Co., Ltd. Frequency fine-adjusting apparatus for a piezo-electric oscillator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB914814A (en) * 1958-06-26 1963-01-02 Kristall Verarbeitung Neckarbi Improvements in or relating to the frequency trimming of piezo-electric resonator units
GB1218721A (en) * 1968-01-16 1971-01-13 Thomson Csf Improved method for adjusting a crystal oscillator
US4454639A (en) * 1982-06-03 1984-06-19 Motorola, Inc. Method for tuning piezoelectric resonators
GB2199985A (en) * 1986-12-22 1988-07-20 Raytheon Co Surface acoustic wave device
US5035202A (en) * 1989-04-13 1991-07-30 Matsushita Electric Industrial Co., Ltd. Frequency fine-adjusting apparatus for a piezo-electric oscillator

Also Published As

Publication number Publication date
GB2236616A (en) 1991-04-10
GB8922310D0 (en) 1989-11-22

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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)
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: 20041004