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Class Information
Number: 323/349
Name: Electricity: power supply or regulation systems > External or operator controlled > Using a three or more terminal semiconductive device as the final control device
Description: Subject matter wherein the device which ultimately controls the level of the output is a transistor or SCR.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7541787 |
Transistor drive circuit, constant voltage circuit, and method thereof using a plurality of error amplifying circuits to effectively drive a power transistor |
Jun. 2, 2009 |
| 7538453 |
Fan power supply system |
May. 26, 2009 |
| 7531995 |
Electronic device |
May. 12, 2009 |
| 7391200 |
P-channel power chip |
Jun. 24, 2008 |
| 7388356 |
System and method for providing voltage regulation in a multi-voltage power system |
Jun. 17, 2008 |
| 7378829 |
Method and system for providing voltage |
May. 27, 2008 |
| 7245465 |
Voltage regulator |
Jul. 17, 2007 |
| 7071672 |
Method and circuit arrangement for generating an output voltage |
Jul. 4, 2006 |
| 7068000 |
Torque control device for electrical tools |
Jun. 27, 2006 |
| 7023717 |
Switching power supply apparatus |
Apr. 4, 2006 |
| 6972975 |
Voltage converter with selectable output voltage levels |
Dec. 6, 2005 |
| 6900621 |
Digitally controlled modular power supply for automated test equipment |
May. 31, 2005 |
| 6724196 |
Temperature controlled high voltage regulator |
Apr. 20, 2004 |
| 6548996 |
Optimized on/off control circuit |
Apr. 15, 2003 |
| 6414855 |
Power converter with power converter element and controller formed on different semiconductor substrates |
Jul. 2, 2002 |
| 6366072 |
Optimized power supply system for an electronic circuit |
Apr. 2, 2002 |
| 6218823 |
Differential voltage regulator |
Apr. 17, 2001 |
| 6215289 |
Switchable D.C. voltage regulation circuit |
Apr. 10, 2001 |
| 6208127 |
Methods and apparatus to predictably change the output voltage of regulators |
Mar. 27, 2001 |
| 6184663 |
Apparatus for driving electric load |
Feb. 6, 2001 |
| 6177785 |
Programmable voltage regulator circuit with low power consumption feature |
Jan. 23, 2001 |
| 6018236 |
Differential voltage regulator |
Jan. 25, 2000 |
| 5907238 |
Power source monitoring arrangement and method having low power consumption |
May. 25, 1999 |
| 5838150 |
Differential voltage regulator |
Nov. 17, 1998 |
| 5828209 |
Voltage reference arrangement, a voltameter, a battery voltage detection arrangement, and a wireless communication device |
Oct. 27, 1998 |
| 5747979 |
Multiple value voltage output circuit and liquid crystal display driving circuit |
May. 5, 1998 |
| 5698972 |
Voltage regulator circuit |
Dec. 16, 1997 |
| 5694035 |
Voltage regulator circuit |
Dec. 2, 1997 |
| 5682054 |
Rectifying transfer gate device |
Oct. 28, 1997 |
| 5650924 |
Electric power supply device for a monitor |
Jul. 22, 1997 |
| 5604429 |
Rectifying transfer gate circuit |
Feb. 18, 1997 |
| 5489840 |
Control circuit for controlling voltage supply to electric devices |
Feb. 6, 1996 |
| 5426334 |
Micropower gate charge pump for power MOSFETS |
Jun. 20, 1995 |
| 5424629 |
Power circuit for a semiconductor apparatus |
Jun. 13, 1995 |
| 5408172 |
Step-down circuit for power supply voltage capable of making a quick response to an increase in load current |
Apr. 18, 1995 |
| 5347211 |
Selectable output power converter |
Sep. 13, 1994 |
| 5345167 |
Automatically adjusting drive circuit for light emitting diode |
Sep. 6, 1994 |
| 5278490 |
One-cycle controlled switching circuit |
Jan. 11, 1994 |
| 5260646 |
Low power regulator for a voltage generator circuit |
Nov. 9, 1993 |
| 5258662 |
Micropower gate charge pump for power MOSFETS |
Nov. 2, 1993 |
| 5254878 |
Voltage regulated power supply providing a constant output voltage |
Oct. 19, 1993 |
| 5254937 |
Power supply control device having memory tables for providing a stabilized output |
Oct. 19, 1993 |
| 5245272 |
Electronic control for series circuits |
Sep. 14, 1993 |
| 5245218 |
Electric circuit for stabilizing the transfer impedance of an integrated circuit |
Sep. 14, 1993 |
| 5202619 |
Control circuit for a switching transistor |
Apr. 13, 1993 |
| 5194802 |
Transconductance current regulator using precisely sampled charges for current control |
Mar. 16, 1993 |
| 5177431 |
Linear programming circuit for adjustable output voltage power converters |
Jan. 5, 1993 |
| 5177429 |
DC power source circuit |
Jan. 5, 1993 |
| 5164657 |
Synchronous switching power supply comprising buck converter |
Nov. 17, 1992 |
| 5138205 |
Synchronized thyristor firing control |
Aug. 11, 1992 |
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