US5028888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage current-controlled oscillator
Assignee: Level One Communications Inc
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Filing: 1989-11-15
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Granted: 1991-07-02
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Expires: 2009-11-15
Abstract
Abstract A current-controlled oscillator includes a plurality of switches for generating a time delay signal, each switch including an MOS transistor operatively coupled to the next gate by means including a capacitor, the final MOS transistor being connected to the initial MOS transistor by a feedback conductor also operatively connected with a capacitor. The frequency of the oscillator is varied by varying current injected into the oscillator.
Inventors
- 👤 Daniel L. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/027; H03K3/03; H03K3/0315; H03K3/353; H03K3/354
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A current-controlled oscillator stage comprising: current source means; current sink means; capacitor means connected with the current source means; switch means switchably connecting the current source means and the capacitor means to the current sink means; wherein the current sink means substantially more current than the current supplied by the current source means.
Claim 2
Dependent Claim
53 words
A current-controlled oscillator stage comprising: current source means; current sink means; capacitor means connected with the current source means; switch means switchably connecting the current source means and the capacitor means to the current sink means; wherein the current sink means substantially more current than the current supplied by the current source means.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein the current sink means sinks substantially twice the current supplied by the current source means.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 wherein the capacitor has one terminal connected to the current source means and the other terminal connected to a voltage reference terminal.
Claim 5
Dependent Claim
20 words
The apparatus of claim 3 wherein the connection of the capacitor to the current source means provides an output signal.
Claim 6
Dependent Claim
37 words
The apparatus of claim 4 wherein the switch means comprise an N channel MOS transistor, having a first source/drain region connected to the current source means and a second source/drain region connected to the current sink means.
Claim 7
Dependent Claim
47 words
The apparatus of claim 5 wherein the current source means comprise a P channel MOS transistor with a first source/drain region connected to the capacitor means, and a second source/drain region connected to a voltage supply terminal, and the gate connected to a current source voltage reference.
Claim 8
Dependent Claim
52 words
The apparatus of claim 6 wherein the current sink means comprise an N channel MOS transistor with a first source/drain region connected to the second source/drain region of the first switch means, a second source/drain region connected to a voltage supply terminal, and a gate connected to a current sink voltage reference.
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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |