Patent US5136186A successfully refreshed from Google Patents.
US5136186A
Expired / Lapsed
US
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Glitch free power-up for a programmable array
Assignee: STMicroelectronics lnc USA
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Filing: 1991-08-30
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Granted: 1992-08-04
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Expires: 2011-08-30
Abstract
Abstract Dummy circuitry, including a dummy input buffer, associated lines, and an additional row in the PLD array, provides an additional input to the PLD to keep the voltage on the bit line low until the correct input signal has fully propagated through the working input buffer and associated lines, thereby preventing a voltage glitch.
Inventors
- 👤 Cuong Trinh
- 👤 Alex Shubat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:23
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/003; H03K19/00346; H03K19/00361; H03K19/02; H03K19/173; H03K19/177; H03K19/17704; H03K19/17708; H03K19/17712
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
78 words
Structure comprising: a signal line connected to a circuit for driving said circuit; a first plurality of storage elements connected to said signal line; means for clamping said signal line at a first specified signal level for a selected time during power-down of said structure; and means for maintaining said signal line at a predetermined signal range for a selected time during power-up of said structure to prevent said signal line from developing a voltage glitch during power-up.
Claim 2
Dependent Claim
78 words
Structure comprising: a signal line connected to a circuit for driving said circuit; a first plurality of storage elements connected to said signal line; means for clamping said signal line at a first specified signal level for a selected time during power-down of said structure; and means for maintaining said signal line at a predetermined signal range for a selected time during power-up of said structure to prevent said signal line from developing a voltage glitch during power-up.
Claim 3
Dependent Claim
27 words
Structure as in claim 1 wherein said means for maintaining said signal line at said predetermined signal range comprises a dummy circuit connected to said signal line.
Claim 4
Dependent Claim
24 words
Structure as in claim 2 wherein said dummy circuit is deactivated after all said first plurality of storage elements have been activated during power-up.
Claim 5
Dependent Claim
70 words
Structure as in claim 2 wherein each of said first plurality of storage elements comprises an input line; wherein said dummy circuit comprises an input line; wherein said input line of said dummy circuit is positioned relative to one of said input lines of said first plurality of storage elements such that said dummy circuit is deactivated after all said first plurality of storage elements have been activated during power-up.
Claim 6
Dependent Claim
29 words
Structure as in claim 2 wherein said predetermined signal range is achieved by said dummy circuit overriding said first plurality of storage elements to provide said specified signal level.
Claim 7
Dependent Claim
23 words
Structure as in claim 5 wherein said predetermined signal range is between said first specified signal level and a second specified signal level.
Claim 8
Dependent Claim
23 words
Structure as in claim 6 wherein said second specified signal level is a maximum value which is a trip point of said circuit.
Claim 9
Dependent Claim
12 words
Structure as in claim 7 wherein said circuit is a sense amplifier.
Claim 10
Dependent Claim
35 words
Structure of claim 7 wherein said dummy circuit comprises a second plurality of storage elements, each of said second plurality of storage elements having a substantially similar configuration to said first plurality of storage elements.
Claim 11
Dependent Claim
40 words
Structure as in claim 1 wherein said means for maintaining is positioned relative to said first plurality of storage elements such that said means for maintaining is deactivated after all said plurality of storage elements have been activated during power-up.
Claim 12
Dependent Claim
84 words
Structure comprising: a signal line connected to a circuit for driving said circuit; a first plurality of storage elements connected to said signal line; means for clamping said signal line at a first specified signal level for a selected time during power down of said structure: and a second plurality of storage elements for maintaining said signal line at a predetermined signal range for a selected time during power-up of said structure to prevent said signal line from developing a voltage glitch during power-up.
Claim 13
Dependent Claim
84 words
Structure comprising: a signal line connected to a circuit for driving said circuit; a first plurality of storage elements connected to said signal line; means for clamping said signal line at a first specified signal level for a selected time during power down of said structure: and a second plurality of storage elements for maintaining said signal line at a predetermined signal range for a selected time during power-up of said structure to prevent said signal line from developing a voltage glitch during power-up.
Claim 14
Dependent Claim
18 words
Structure as in claim 11 wherein said second plurality of storage elements are connected to said signal line.
Claim 15
Dependent Claim
27 words
Structure as in claim 12 wherein said second plurality of storage elements are deactivated after all said first plurality of storage elements have been activated during power-up.
Claim 16
Dependent Claim
79 words
Structure as in claim 12 wherein each of said first plurality of storage elements comprises an input line; wherein each of said second plurality of storage elements comprises an input line; wherein said input lines of said second plurality of storage elements are positioned relative to said input lines of said first plurality of storage elements such that said second plurality of storage elements are activated after all said first plurality of storage elements have been activated during power-up.
Claim 17
Dependent Claim
32 words
Structure as in claim 12 wherein said predetermined signal range is achieved by said second plurality of storage elements overriding said first plurality of storage elements to provide said predetermined signal range.
Claim 18
Dependent Claim
23 words
Structure as in claim 15 wherein said predetermined signal range is between said first specified signal level and a second specified signal level.
Claim 19
Dependent Claim
23 words
Structure as in claim 16 wherein said second specified signal level is a maximum value which is a trip point of said circuit.
Claim 20
Dependent Claim
12 words
Structure as in claim 17 wherein said circuit is a sense amplifier.
Claim 21
Dependent Claim
23 words
Structure of claim 17 wherein said second plurality of storage elements have a substantially similarly configuration to said first plurality of storage elements.
References Cited (Backward Citations)
US3560765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |