US Patent No: 7,349,821
Number of patents in Portfolio can not be more than 2000
Bi-directional signal converter
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Mar 25, 2008
Issued date -
Sep 3, 2004
filing date -
10/934,296
serial no -
In Force
status
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Abstract
A device and method for conversion of bi-directional signals using controlled dual value up/down counters uses a plurality of cascaded up/down counters chained together to alter the ratio of a maximum coefficient of N to N+1 for the first counter in the cascade of counters. The output count signal of each counter is connected to the clock signal input of the next counter. The signal to be converted is input to the first counter in the chain and each input pulse increments or decrements a count value for the counter until a maximum coefficient or zero is reached at which point a count pulse is output of the counter and it is then reset to zero or the maximum coefficient at the next input pulse depending on whether a direction input is high or low circuit.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,081,339 Method and apparatus for measuring the direction and position of rotating bodies | 26 | 1998 | |
| 6,411,376 Method and apparatus for measuring the direction and position of rotating bodies | 6 | 2000 | |
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| 5,426,457 Direction-independent encoder reading; position leading and delay, and uncertainty to improve bidirectional printing | 15 | 1993 | |
| 5,561,449 Position leading, delay and timing uncertainty to improve position & quality in bidirectional printing | 33 | 1995 | |
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| 4,831,510 Encoder and resolver signal processing circuit | 20 | 1987 | |
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| 4,555,793 Averaging non-integer frequency division apparatus | 10 | 1983 | |
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| 5,287,296 Clock generators having programmable fractional frequency division | 17 | 1992 | |
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| 6,355,927 Interpolation methods and circuits for increasing the resolution of optical encoders | 15 | 1999 | |
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| 5,127,035 Pulse counter circuit and displacement measuring device | 8 | 1990 | |
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| 6,577,985 Scalable code absolute logic function (SCALF) encoder | 10 | 2000 | |
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| 4,884,226 Method for detecting position | 6 | 1988 | |
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| 5,335,253 Non-integral frequency division using regulated digital divider circuits | 7 | 1992 | |
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| 5,905,538 System of switching video of two different standards | 5 | 1997 | |
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| 4,486,845 Resolver to incremental shaft encoder converter | 17 | 1982 | |
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| 5,059,924 Clock adapter using a phase locked loop configured as a frequency multiplier with a non-integer feedback divider | 81 | 1990 | |
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| 6,396,052 High precision analog encoder system | 9 | 2000 | |
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| 6,789,041 Bi-directional signal converter | 2 | 2002 | |
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| 6,097,782 Multi-modulus frequency divider | 8 | 1998 | |
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| 6,563,108 System for tracking angular and linear motion | 7 | 1999 | |
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| 4,975,931 High speed programmable divider | 21 | 1988 | |
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| 4,658,406 Digital frequency divider or synthesizer and applications thereof | 23 | 1985 | |
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| 5,237,521 High resolution position measurement system | 19 | 1992 | |
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| 4,482,972 Distance sensing apparatus and method | 12 | 1981 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 25, 2015 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 25, 2019 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |