US5093612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary voltage supply and voltage clamping circuit
Assignee: NXP USA Inc
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Filing: 1990-07-05
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Granted: 1992-03-03
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Expires: 2010-07-05
Abstract
Abstract A circuit (200) for generating a first (EL1) and second (EL2) drive signals and limiting a maximum voltage of each of the drive signals (EL1, EL2). The circuit (200) further samples the drive signals (EL1, EL2) to provide a voltage source (Vdd).
Inventors
- 👤 Barry W. Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:39
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/687; H03K17/693; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/06; H02M3/07; H03K17/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
A circuit, comprising: means for generating a first and second drive signals; means for limiting a maximum voltage of each of the drive signals; means for sampling the drive signals to provide a voltage source.
Claim 2
Dependent Claim
35 words
A circuit, comprising: means for generating a first and second drive signals; means for limiting a maximum voltage of each of the drive signals; means for sampling the drive signals to provide a voltage source.
Claim 3
Dependent Claim
16 words
The circuit according to claim 1 wherein the first and second drive signals comprise periodic signals.
Claim 4
Dependent Claim
28 words
The circuit according to claim 1 wherein the limiting means comprises a capacitive divider and a zener diode coupled with a transistor that route excess current to ground.
Claim 5
Independent Claim
41 words
A method for generating a secondary voltage supply, comprising the steps of: (a) generating a first and a second drive signals; (b) limiting a maximum voltage of the drive signals; (c) sampling the drive signals to provide a secondary voltage source.
Claim 6
Independent Claim
41 words
A method for generating a secondary voltage supply, comprising the steps of: (a) generating a first and a second drive signals; (b) limiting a maximum voltage of the drive signals; (c) sampling the drive signals to provide a secondary voltage source.
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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |