Patent US3761791A successfully refreshed from Google Patents.
US4298971A
Expired / Lapsed
US
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Electronic timpiece
Assignee: Citizen Watch Co Ltd
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Filing: 1979-01-05
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Granted: 1981-11-03
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Expires: 1999-01-05
Abstract
Abstract An electronic timepiece having voltage regulation, temperature detection and battery voltage detection means provided on the same integrated circuit as is used for timekeeping circuitry, and having external terminals for stepwise weighted adjustment of timekeeping gain/loss.
Inventors
- 👤 Shigeru Morokawa
- 👤 Keiichiro Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
G; G04; G04C; G04C10/00; G04C10/04; G04G; G04G3/00; G04G3/02; G04G3/022; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0047; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/24; G05F3/242; G05F3/245; G05F3/247; Y; Y10; Y10S; Y10S331/00; Y10S331/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
In an electronic timepiece powered by a battery and having an integrated circuit chip including a standard frequency signal source for providing a signal of relatively high frequency, frequency divider means responsive to said relatively high frequency signal for producing a relatively low frequency signal, drive signal generator means responsive to said relatively low frequency signal for producing drive signals, and display means responsive to said drive signals for providing a time information, the improvement comprising: a voltage stabilizer circuit formed on said integrated circuit chip for producing a stabilized voltage, said voltage stabilizer circuit including at least one combination of a non-linear element and a current mirror circuit, in which said at least one combination of said non-linear element and said current mirror circuit provides a basic voltage to cause said stabilized voltage to be produced by said voltage stabilizer circuit; and a temperature sensor formed on said integrated circuit chip and driven by said stabilized voltage.
Claim 2
Dependent Claim
158 words
In an electronic timepiece powered by a battery and having an integrated circuit chip including a standard frequency signal source for providing a signal of relatively high frequency, frequency divider means responsive to said relatively high frequency signal for producing a relatively low frequency signal, drive signal generator means responsive to said relatively low frequency signal for producing drive signals, and display means responsive to said drive signals for providing a time information, the improvement comprising: a voltage stabilizer circuit formed on said integrated circuit chip for producing a stabilized voltage, said voltage stabilizer circuit including at least one combination of a non-linear element and a current mirror circuit, in which said at least one combination of said non-linear element and said current mirror circuit provides a basic voltage to cause said stabilized voltage to be produced by said voltage stabilizer circuit; and a temperature sensor formed on said integrated circuit chip and driven by said stabilized voltage.
Claim 3
Dependent Claim
27 words
The improvement according to claim 1, in which said voltage stabilizer circuit further includes a differential amplifier responsive to said basic voltage for producing said stabilized voltage.
Claim 4
Dependent Claim
25 words
The improvement according to claim 1, in which said non-linear element comprises at least one field effect transistor having gate and drain terminal connected together.
Claim 5
Dependent Claim
26 words
The improvement according to any one of claims 1 to 3, in which said current mirror circuit comprises at least a pair of field effect transistors.
Claim 6
Dependent Claim
30 words
The improvement according to claim 1, in which said frequency divider means further produces a control signal, and in which said temperature sensor is intermittently operated by said control signal.
Claim 7
Dependent Claim
138 words
In an electronic timepiece powered by a battery and having an integrated circuit chip including a standard frequency signal source for providing a signal of relatively high frequency, frequency divider means responsive to said relatively high frequency signal for producing a relatively low frequency signal, drive signal generator means responsive to said relatively high frequency signal for producing drive signals, and display means responsive to said drive signals for providing a time information, the improvement comprising: a voltage stabilizer circuit formed on said integrated circuit chip, said voltage stabilizer circuit including at least one combination of a non-linear element and a current mirror circuit providing a basic voltage and a differential amplifier responsive to said basic voltage for producing a stabilized voltage; and a temperature sensor formed on said integrated circuit chip and driven by said stabilized voltage.
Claim 8
Dependent Claim
138 words
In an electronic timepiece powered by a battery and having an integrated circuit chip including a standard frequency signal source for providing a signal of relatively high frequency, frequency divider means responsive to said relatively high frequency signal for producing a relatively low frequency signal, drive signal generator means responsive to said relatively high frequency signal for producing drive signals, and display means responsive to said drive signals for providing a time information, the improvement comprising: a voltage stabilizer circuit formed on said integrated circuit chip, said voltage stabilizer circuit including at least one combination of a non-linear element and a current mirror circuit providing a basic voltage and a differential amplifier responsive to said basic voltage for producing a stabilized voltage; and a temperature sensor formed on said integrated circuit chip and driven by said stabilized voltage.
Claim 9
Dependent Claim
25 words
The improvement according to claim 6, in which said non-linear element comprises at least one field effect transistor having gate and drain terminal connected together.
Claim 10
Dependent Claim
21 words
The improvement according to claim 6, in which said current mirror circuit comprises at least a pair of field effect transistors.
Claim 11
Dependent Claim
30 words
The improvement according to claim 6, in which said frequency divider means further produces a control signal, and in which said temperature sensor is intermittently operated by said control signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |