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US5396195A
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Low-power-dissipation CMOS oscillator circuits
Assignee: Agere Systems LLC
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Filing: 1993-12-13
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Granted: 1995-03-07
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Expires: 2013-12-13
Abstract
Abstract Low-power-dissipation CMOS oscillator circuits include inductors and capacitors forming tank circuitry. Cross-connected MOS devices provide positive feedback to replenish losses in the tank circuitry and thereby sustain oscillations. Each such oscillator circuit simultaneously generates complementary output sine-wave signals.
Inventors
- 👤 Thaddeus J. Gabara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
H; H03; H03L; H03L3/00; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1206; H03B5/1212; H03B5/1228; H03B5/1237; H03B5/1271; H03B2200/00; H03B2200/006; H03B2200/0082; H03B2200/0094; H03B2200/0098; H03B5/18; H03B5/1841; H03B5/1847; H03B5/1852
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
An oscillator circuit comprising first and second MOS devices of one conductivity type, each of said devices including source, drain and gate electrodes, means directly connecting the drain electrode of said first device to the gate electrode of said second device and directly connecting the drain electrode of said second device to the gate electrode of said first device, and tank circuitry comprising at least one inductor and capacitors connected to said source and drain electrodes.
Claim 2
Dependent Claim
76 words
An oscillator circuit comprising first and second MOS devices of one conductivity type, each of said devices including source, drain and gate electrodes, means directly connecting the drain electrode of said first device to the gate electrode of said second device and directly connecting the drain electrode of said second device to the gate electrode of said first device, and tank circuitry comprising at least one inductor and capacitors connected to said source and drain electrodes.
Claim 3
Dependent Claim
22 words
An oscillator circuit as in claim 1 further including means for connecting said source and drain electrodes to a source of potential.
Claim 4
Dependent Claim
46 words
An oscillator as in claim 2 wherein said tank circuitry comprises a capacitor directly connected between said drain electrodes, capacitors respectively connected between the source and drain electrodes of each of said devices, and inductors respectively connected between said drain electrodes and said source of potential.
Claim 5
Dependent Claim
16 words
An oscillator circuit as in claim 3 further including start-up circuitry connected to said drain electrodes.
Claim 6
Dependent Claim
35 words
An oscillator circuit as in claim 2 wherein said tank circuit comprises an inductor directly connected between said drain electrodes, and capacitors respectively connected between the source and drain electrodes of each of said devices.
Claim 7
Dependent Claim
44 words
An oscillator circuit as in claim 5 wherein first and second MOS devices of the other conductivity type have their source-to-drain paths respectively connected between said source of potential and the drain electrodes of said first and second devices of said one conductivity type.
Claim 8
Dependent Claim
28 words
An oscillator circuit as in claim 6 further including a variable source of direct-current voltage connected to the gate electrodes of the devices of said other conductivity type.
Claim 9
Dependent Claim
27 words
An oscillator circuit as in claim 7 further including start-up circuitry connected to the drain electrodes of said first and second devices of said one conductivity type.
Claim 10
Dependent Claim
96 words
An oscillator circuit comprising first and second MOS devices of one conductivity type, each of said devices including source, drain and gate electrodes, means directly connecting the drain electrode of said first device to the gate electrode of said second device and directly connecting the drain electrode of said second device to the gate electrode of said first device, a reactive element connected between the drain electrodes of said first and second devices, and means including additional reactive elements for connecting the source and drain electrodes of said first and second devices to associated power sources.
Claim 11
Dependent Claim
96 words
An oscillator circuit comprising first and second MOS devices of one conductivity type, each of said devices including source, drain and gate electrodes, means directly connecting the drain electrode of said first device to the gate electrode of said second device and directly connecting the drain electrode of said second device to the gate electrode of said first device, a reactive element connected between the drain electrodes of said first and second devices, and means including additional reactive elements for connecting the source and drain electrodes of said first and second devices to associated power sources.
Claim 12
Dependent Claim
15 words
An oscillator circuit as in claim 9 wherein said first-mentioned reactive element comprises a capacitor.
Claim 13
Dependent Claim
64 words
An oscillator circuit as in claim 10 wherein said additional reactive elements comprise a capacitor and an inductor each connected to the drain electrode of said first device and adapted to be connected to said power sources, and an additional capacitor and an additional inductor each connected to the drain electrode of said second device and adapted to be connected to said power sources.
Claim 14
Dependent Claim
15 words
An oscillator circuit as in claim 9 wherein said first-mentioned reactive element comprises an inductor.
Claim 15
Dependent Claim
55 words
An oscillator circuit as in claim 12 wherein said additional reactive elements comprise a capacitor connected to the drain electrode of said first device and adapted to be connected to said power sources, and an additional capacitor connected to the drain electrode of said second device and adapted to be connected to said power sources.
References Cited (Backward Citations)
JPH0329504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |