US5689677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for enhancing performance of a computer for personal use
Assignee: Individual
•
Filing: 1995-06-05
•
Granted: 1997-11-18
•
Expires: 2015-06-05
Abstract
Abstract A circuit for modifying an instruction stream comprises a first logic circuit capable of issuing instructions and a second logic circuit means responding to the instructions. The circuit also includes a dynamic memory circuit which is responsive to the first logic and a dynamic memory means. The first logic circuit is capable of causing a refresh of the dynamic memory means by inserting a refresh instruction into a sequence of instructions.
Inventors
- 👤 David C. MacMillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:11
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F9/38; G06F9/3877; G06F9/3879; G06F15/00; G06F15/76; G06F15/78; G06F15/7807; G06F15/7821; G06F15/80; G06F15/8007; G06F15/8015; G06F9/3885; G06F9/3887
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A circuit comprising: a first logic circuit means capable of issuing instructions; a second logic circuit means responding to the instructions; and a dynamic memory means, the first logic circuit means capable of causing a refresh of the dynamic memory means by inserting a new refresh instruction into a sequence of instructions.
Claim 2
Dependent Claim
52 words
A circuit comprising: a first logic circuit means capable of issuing instructions; a second logic circuit means responding to the instructions; and a dynamic memory means, the first logic circuit means capable of causing a refresh of the dynamic memory means by inserting a new refresh instruction into a sequence of instructions.
Claim 3
Dependent Claim
42 words
The circuit of claim 1, further including a program counter means in the first logic circuit means, wherein the program counter's value is the same before and after the first logic circuit means inserts a refresh instruction into a sequence of instructions.
References Cited (Backward Citations)
US4172282A
Cited
US4924381A
Cited
US4961167A
Cited
US5280474A
Cited
US5313590A
Cited
US5345556A
Cited
US5345574A
Cited
US5229969A
Cited
US5243699A
Cited
US5475645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |