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US5541532A
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All MOS single-ended to differential level converter
Assignee: STMicroelectronics NV
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Filing: 1995-08-17
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Granted: 1996-07-30
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Expires: 2015-08-17
Abstract
Abstract An all MOS single-ended to differential level converter including: first and second source follower circuits each including first and second PMOS semiconductors each having a drain, a source and a gate electrode; a current source commonly connected to the drain electrodes of the first and second PMOS semiconductors; an input circuit for providing to one of the gate electrodes a single-ended input signal and to the other an inverted single-ended input signal; and first and second load impedances connected to the source electrodes of the first and second PMOS semiconductors, respectively, for providing output analog differential signals at a level which is a function of the load impedances and current source magnitude.
Inventors
- 👤 Kevin J. McCall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:37
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/0175; H03K19/0185; H03K19/018507; H03K19/018521; H03K19/018528; H03K19/003; H03K19/00369; H03K19/00384
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
An all MOS single-ended to differential level converter comprising: first and second source follower circuits each including first and second PMOS semiconductors each having a drain, a source and a gate electrode; a current source commonly connected to said drain electrodes of said first and second PMOS semiconductors; an input circuit for providing to one of said gate electrodes a single-ended input signal and to the other an inverted said single-ended input signal; first and second load impedences connected to said source electrodes of said first and second PMOS semiconductors, respectively; and first and second output terminals for providing output analog differential signals at a level which is a function of said load impedances and current source magnitude; said first output terminal connector to said first load impedance and to said first PMOS semiconductor and said second output terminal connected to said second load impedance and to said second PMOS semiconductor.
Claim 2
Dependent Claim
151 words
An all MOS single-ended to differential level converter comprising: first and second source follower circuits each including first and second PMOS semiconductors each having a drain, a source and a gate electrode; a current source commonly connected to said drain electrodes of said first and second PMOS semiconductors; an input circuit for providing to one of said gate electrodes a single-ended input signal and to the other an inverted said single-ended input signal; first and second load impedences connected to said source electrodes of said first and second PMOS semiconductors, respectively; and first and second output terminals for providing output analog differential signals at a level which is a function of said load impedances and current source magnitude; said first output terminal connector to said first load impedance and to said first PMOS semiconductor and said second output terminal connected to said second load impedance and to said second PMOS semiconductor.
Claim 3
Dependent Claim
35 words
The all MOS single-ended to differential level converter of claim 1 in which said current source is an NMOS semiconductor with its drain electrode connected to said drain electrodes of said first and second semiconductors.
Claim 4
Dependent Claim
52 words
The all MOS single-ended to differential level converter of claim 1 in which said input includes two channels one connected to each of said gate electrodes of said first and second PMOS semiconductors one of said channels including an inverter and the other including a non-inverting transmission gate for propagation delay equalization.
Claim 5
Dependent Claim
26 words
The all MOS single-ended to differential level converter of claim 1 in which said first and second load impedances include third and fourth PMOS semiconductors, respectively.
Claim 6
Dependent Claim
25 words
The all MOS single-ended to differential level converter of claim 4 further including a replica bias circuit for biasing said third and fourth PMOS semiconductors.
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) | 1999-07-30 | 2000-01-29 | 2000-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-30 | 2004-01-29 | 2004-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-30 | 2008-01-29 | 2008-07-30 | $7700.00 | Window Closed / Lapsed |