US Patent No: 8,207,722
Number of patents in Portfolio can not be more than 2000
DC/DC converter
Stats
-
Jun 26, 2012
Issued date -
Aug 25, 2009
filing date -
12/547,050
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A boost DC/DC converter has a voltage dividing circuit connected between the output terminal and the ground, that outputs a divided voltage obtained by dividing the output voltage; a reference voltage generating circuit that generates a reference voltage based on the input voltage; an error amplifier that outputs a first signal corresponding to the difference between the divided voltage and the reference voltage; a feedforward circuit that detects the input voltage and outputs a second signal corresponding to a current inversely proportional to the input voltage; a multiplier that multiples the first signal by the second signal and outputs a third signal obtained; and a control circuit that outputs, based on the third signal, a control signal for controlling on/off of the switching transistor so that the divided voltage is equal to the reference voltage.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 5,949,229 Power factor correction circuit having an error signal multiplied by a current signal | 43 | 1997 | |
|
|
|||
| 2008/0122,422 Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction | 4 | 2007 | |
|
|
|||
| 5,708,356 Apparatus for supplying stabilized power to a load having voltage-current characteristics exhibiting partial negative resistance | 6 | 1996 | |
|
|
|||
| 2006/0043,942 Power converter apparatus and methods using output current feedforward control | 5 | 2005 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Dec 26, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 26, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 26, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |