US Patent No: 6,573,747
Number of patents in Portfolio can not be more than 2000
Digital update scheme for adaptive impedance control of on-die input/output circuits
Stats
-
Jun 3, 2003
Issued date -
Sep 28, 2001
filing date -
09/965,627
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
An adaptive impedance matching arrangement has an adaptive impedance circuit and a control circuit. The adaptive impedance circuit matches the impedance of a bus and is controlled according to control bits supplied by the control circuit. The control bits are updated according to a signal indicating the state of a queue maintaining transactions for the bus.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 4,719,369 Output circuit having transistor monitor for matching output impedance to load impedance | 172 | 1986 | |
| 6,049,221 Semiconductor integrated circuit system having function of automatically adjusting output resistance value | 21 | 1998 | |
|
|
|||
| 6,114,898 Method of signal transmission between semiconductor integrated circuits and output drive circuit for use therewith | 24 | 1998 | |
|
|
|||
| 5,095,231 Automatic system for adjusting the output impedance of fast CMOS drivers | 52 | 1990 | |
|
|
|||
| 5,559,447 Output buffer with variable output impedance | 43 | 1994 | |
|
|
|||
| 5,134,311 Self-adjusting impedance matching driver | 292 | 1990 | |
|
|
|||
| 5,677,639 Autonomous selection of output buffer characteristics as determined by load matching | 14 | 1994 | |
|
|
|||
| 5,955,894 Method for controlling the impedance of a driver circuit | 44 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 3, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |