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Patent US4967165A successfully refreshed from Google Patents.
US4967165A
Expired / Lapsed
US
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Crystal reference for use in oscillator circuit
Assignee: CTS Corp
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Filing: 1989-02-14
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Granted: 1990-10-30
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Expires: 2009-02-14
Abstract
Abstract Operational characteristics of a crystal reference element (10) are measured during a testing and grading process. Once determined, information representing these operational characteristics are stored in a memory means (16) within the crystal reference element. In this way, the operational characteristics particular to each crystal reference element may be readily retrieved and used to compensate an oscillator circuit (32).
Inventors
- 👤 King F. Lee
- 👤 Frederick L. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:46
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/02; H03B5/04; H03L; H03L1/00; H03L1/02; H03L1/022; H03L1/026; H03B2200/00; H03B2200/0014; H03B2200/0018; H03L1/028
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
33 words
A reference element for use in an oscillator, comprising: a resonant circuit positioned in a housing; and means for permanently storing information within said housing representing predetermined operational characteristics of said resonant circuit.
Claim 2
Dependent Claim
33 words
A reference element for use in an oscillator, comprising: a resonant circuit positioned in a housing; and means for permanently storing information within said housing representing predetermined operational characteristics of said resonant circuit.
Claim 3
Dependent Claim
12 words
The device of claim 1, wherein said resonant circuit comprises a crystal.
Claim 4
Dependent Claim
12 words
The device of claim 2, wherein said crystal comprises a AT-cut crystal.
Claim 5
Dependent Claim
36 words
A reference element for use in an oscillator, comprising: a resonant circuit; and means for storing information representing operational characteristics of said resonant circuit, wherein said means for storing information comprises at least a fusible link.
Claim 6
Dependent Claim
36 words
A reference element for use in an oscillator, comprising: a resonant circuit; and means for storing information representing operational characteristics of said resonant circuit, wherein said means for storing information comprises at least a fusible link.
Claim 7
Dependent Claim
11 words
The device of claim 4, wherein said fusible links are fuses.
Claim 8
Dependent Claim
18 words
The device of claim 1, wherein said means for storing information comprises at least one semiconductor storage means.
Claim 9
Dependent Claim
16 words
The device of claim 6, wherein said semiconductor storage mean is a programmable read only memory.
Claim 10
Independent Claim
41 words
A device for providing a reference signal, comprising: a resonant circuit positioned in a housing having a predetermined resonant frequency range over a predetermined temperature range; and means for permanently storing information within said housing representing said predetermined resonant frequency range.
Claim 11
Independent Claim
41 words
A device for providing a reference signal, comprising: a resonant circuit positioned in a housing having a predetermined resonant frequency range over a predetermined temperature range; and means for permanently storing information within said housing representing said predetermined resonant frequency range.
Claim 12
Dependent Claim
12 words
The device of claim 8, wherein said resonant circuit comprises a crystal.
Claim 13
Independent Claim
45 words
A device for providing a reference signal, comprising: a resonant circuit having a predetermined resonant frequency range over a predetermined temperature range; and means for storing information representing said predetermined resonant frequency range, wherein said means for storing information comprises at least two fusible links.
Claim 14
Independent Claim
45 words
A device for providing a reference signal, comprising: a resonant circuit having a predetermined resonant frequency range over a predetermined temperature range; and means for storing information representing said predetermined resonant frequency range, wherein said means for storing information comprises at least two fusible links.
Claim 15
Dependent Claim
16 words
The device of claim 8, wherein said memory means comprises at least one semiconductor storage means.
Claim 16
Dependent Claim
79 words
An oscillator circuit for providing an output signal, comprising: a reference element, comprising: a crystal element; means for storing information representing operational characteristics of said crystal element; oscillating means, coupled to said reference element, for providing said output signal; compensation means, coupled to said oscillating means, for maintaining said output signal under varying operational conditions; controller means coupled to said storage means for examining said information representing said operational characteristics and for controlling said compensation means in response thereto.
Claim 17
Dependent Claim
79 words
An oscillator circuit for providing an output signal, comprising: a reference element, comprising: a crystal element; means for storing information representing operational characteristics of said crystal element; oscillating means, coupled to said reference element, for providing said output signal; compensation means, coupled to said oscillating means, for maintaining said output signal under varying operational conditions; controller means coupled to said storage means for examining said information representing said operational characteristics and for controlling said compensation means in response thereto.
Claim 18
Dependent Claim
17 words
The oscillator of claim 12, wherein said means for storing information comprise at least two fusible links.
Claim 19
Dependent Claim
16 words
The oscillator of claim 12, wherein said memory means comprises at least one semiconductor storage means.
Claim 20
Dependent Claim
12 words
The oscillator of claim 12, wherein said controller mean comprise a microprocessor.
Claim 21
Dependent Claim
15 words
The oscillator of claim 12, wherein said oscillating means comprise a voltage controlled crystal oscillator.
Claim 22
Dependent Claim
102 words
An oscillator circuit for providing an output signal over a predetermined temperature range, comprising: a reference element, comprising: a crystal element having a predetermined resonant frequency range over a predetermined temperature range; means for storing information representing said predetermined resonant frequency range; oscillating means, coupled to said reference element, for providing said output signal; compensation means, coupled to said oscillating means, for maintaining said output signal within a predetermined frequency range over the predetermined temperature range; controller means coupled to said storage means for examining said information representing said predetermined resonant frequency range and for controlling said compensation means in response thereto.
Claim 23
Dependent Claim
102 words
An oscillator circuit for providing an output signal over a predetermined temperature range, comprising: a reference element, comprising: a crystal element having a predetermined resonant frequency range over a predetermined temperature range; means for storing information representing said predetermined resonant frequency range; oscillating means, coupled to said reference element, for providing said output signal; compensation means, coupled to said oscillating means, for maintaining said output signal within a predetermined frequency range over the predetermined temperature range; controller means coupled to said storage means for examining said information representing said predetermined resonant frequency range and for controlling said compensation means in response thereto.
Claim 24
Dependent Claim
17 words
The oscillator of claim 17, wherein said means for storing information comprise at least two fusible links.
Claim 25
Dependent Claim
16 words
The oscillator of claim 17, wherein said memory means comprises at least one semiconductor storage means.
Claim 26
Dependent Claim
12 words
The oscillator of claim 18, wherein said controller mean comprises a microprocessor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-10-29 | 1994-04-30 | 1994-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-29 | 1998-04-30 | 1998-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-29 | 2002-04-30 | 2002-10-30 | $7700.00 | Window Closed / Lapsed |