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03/06/2014
Still online, we are. The code for this website is getting old, but still works well as far as I've seen. I may update it with new code and new features eventually, one day when I have both free time and focus. Until then, the content is still useful, I'm keeping it online. Comments and donations are welcome, but include your email address if you want a reply.


09/04/2010
Ideas for the future of the site -
Here are some ideas I've been brainstorming. I don't think to much of the site should change, because it has been successful all these years with very little change. still nearly 1000 visitors a day to the site!
  • donations - I think it might be time to make some changes to the donations. I would rather see people get a lifetime membership and not have to worry about an expire date. here's an idea, a smaller recurring payment monthly, or 4 times a year, then maybe offer a second option, donate enough to cover the cost of the server for one month and you'll get a lifetime membership that never expires.
  • automated account creation - the membership process should be automated. I rarely hear a complaint about anything, but I don't think people feel so safe emailing me a username and password to set up an account. I think people may feel more safe dealing with an automated system. make a donation, then type your account into right in to the computer and have it set up on the spot.
  • members only forum - the site doesn't seem to need a full forum, but it could still benefit from a single simple board or mailing list, maybe. still optional, but maybe only available to members. non-members wouldn't be able to post on or see the forum. for those who donate to openly communicate.
You can send me your comments in the form above. I'm not putting any work into these changes without getting feedback from you!
If we have any web developers out there, we'd love your help! come on, my birthday's tomorrow!


12/20/2009
Better forum? -
We are currently using vbulletin, but maybe there's a simpler alternative that would better fit the site. What do you think of this one? http://schematicforums.com/seo/ Please let us know what you think, keep vBulletin, or switch to SEO. Comment box is below.


09/29/2009
ideas or comments?
please send us your comments or suggestions or any ideas you might have for the site. this is the easiest way for you to let us know what you think. just type in the box above and send.

Thank you, everyone who has helped support the site over the years. you've done your part, now help me do my part to improve the site with your input.




11/25/2009
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05/07/2008
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01/24/2008
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Last Accessed Size  File
08-21-14 1763938  120 W x 2 Channel Class D Audio Power Amplifier Using IRS20955 and IRF6645.pdf
08-21-14 80630  1200W Class D Power Amp.pdf
08-22-14 12425  12V Class D amp.pdf
08-21-14 213515  16W+16W Stereo Class-D Amplifier 50W Mono Btl.pdf
08-21-14 1772348  1kW Buffered To220 IRS2092 Class D Amp using modified IRAUDAMP5 rev2d.pdf
08-21-14 558146  A Little Theory Of Class-D Amplifiers.PDF
08-21-14 103424  A Simple Guide To Selecting Power Mosfets.pdf
08-20-14 2046360  Amplifier-Power - Digital 200W - Hip4080.pdf
08-20-14 1572389  Amplifier-Power-Class D - Digital Power Amplifier - Hip4080.pdf
08-21-14 1572389  Amplifier-Power-Class_D_-_Digital_Power_Amplifier - HIP4080.pdf
08-21-14 2046360  Amplifier-Power_-_Digital_200W - HIP4080.pdf
08-21-14 254976  Analog PWM Amplifier.pdf
08-21-14 254976  Analog Pwm Amplifier.pdf
08-21-14 1007682  Assorted Class D stuff.zip
08-21-14 954643  Assorted Class-D Info.ZIP
08-21-14 1572389  Build A 200W Class D Power Amplifier For Your Car.PDF
08-21-14 782839  CLASS D - HUYGENS MCD TECHNOLOGY.xps
08-20-14 5121  CLASS D PWM car amp with no inverter - 7406 Sub.jpg
08-21-14 30686  CLASS D PWM car amp with no inverter - output transormer.jpg
08-21-14 55103  CLASS D PWM car amp with no inverter.jpg
08-21-14 72551  Car Amp 1.pdf
08-21-14 98428  Car Amp 2.pdf
08-21-14 100530  Class D Amp App Note From On Semi.pdf
08-16-14 84093  Class D Amp Development 30 Dev.ZIP
08-20-14 19849  Class D Amp Level Shifter For Half Bridge Operation.JPG
08-20-14 38848  Class D Amp a6rg2.jpg
08-19-14 100530  Class D Amp app note from ON Semi.pdf
08-19-14 12911  Class D Amp design Idea.gif
08-08-14 176397  Class D Amp.ZIP
08-20-14 1664539  Class D Amplification Circa 1965.pdf
08-11-14 13824  Class D Amplifier Calculations - Texas Instruments.xls
08-21-14 90804  Class D Amplifier Discrete Driver Stage.JPG
08-15-14 20480  Class D Amplifier Power Out vs Current.xls
08-14-14 12911  Class D Amplifier with Discrete Level Shifter.gif
08-19-14 168960  Class D Amplifiers - Interactive Simulations.PDF
08-19-14 514054  Class D Amplifiers Fundamentals of Operation and Recent Developments.mht
08-21-14 55307  Class D Amplifiers Provide High Efficiency For Audio Systems.PDF
08-21-14 396689  Class D Audio Amplifier Output Filter Optimization - Maxim.mht
08-17-14 53110  Class D Audio Amplifier Output Filter Optimization.mht
08-17-14 521644  Class D Audio Amplifier Output Filter Optimization.pdf
08-09-14 311700  Class D Audio Amplifier Output Filter Optimization.xps
08-21-14 242688  Class D Audio Amplifier Performance Relationship to MOSFET Parameters.pdf
08-17-14 55762  Class D Audio Amplifiers - Theory and Design.mht
08-11-14 852144  Class D Audio Amplifiers - Theory and Design.xps
08-21-14 277814  Class D Audio Amplifiers - What Why and How.pdf
08-20-14 21504  Class D Design Guide.pdf
08-16-14 52167  Class D Discussion.PDF
08-21-14 230400  Class D For Diy.pdf
08-19-14 77481  Class D IC amps.PDF
08-21-14 77481  Class D Ic Amps.PDF
08-11-14 70015  Class D OEM product FAQ.mht
08-01-14 17231  Class D Oem Product Faq.ZIP
08-16-14 5213  Class D Power Calculator Excel Spreadsheet.ZIP
08-11-14 24576  Class D Power Calculator.xls
08-14-14 253967  Class D Product FAQ.xps
08-17-14 79638  Class D Pwm Amp With No Inverter.ZIP
08-17-14 5121  Class D Pwm Car Amp With No Inverter - 7406 Sub.JPG
08-19-14 30686  Class D Pwm Car Amp With No Inverter - Output Transormer.JPG
08-21-14 55103  Class D Pwm Car Amp With No Inverter.JPG
08-21-14 1656605  Class D Subwoofer Amp.pdf
08-18-14 1409804  Class D Tutorial.pdf
08-17-14 72551  Class D amp with IR Driver Chip.pdf
08-20-14 13824  Class D amplifier Calculations - Texas Instruments.xls
08-21-14 127758  Class D amplifier using TL494.jpg
08-21-14 55307  Class D amplifiers provide high efficiency for audio systems.PDF
08-15-14 225235  Class D amplifiers provide high efficiency for audio systems.xps
08-16-14 283649  Class D amplifiers.xps
08-21-14 168960  Class D audio-power amplifiers - Interactive simulations.pdf
08-21-14 168960  Class D audio-power amplifiers.pdf
07-21-14 52167  Class D discussion.PDF
08-21-14 230400  Class D for DIY.pdf
08-16-14 13703  Class-D Amp 11_mk1-1b-schalt.gif
08-18-14 1664539  Class-D Amplification Circa 1965.pdf
08-20-14 537864  Class-D LC Filter Design.pdf
08-21-14 918783  Class-D Stereo Amplifier (Not in English).pdf
08-21-14 288538  ClassD2.pdf
08-20-14 60697  Combined Power Supply And Audio Amplifier.PDF
08-11-14 112938  Component selection, layout lead to success with Class D audio amps.mht
08-19-14 464502  Component selection, layout lead to success with Class D audio amps.xps
08-20-14 515  Crown Input Board.pdf
08-20-14 515  Crown K series Service Manual.pdf
08-16-14 515  Crown Main Board.pdf
08-20-14 515  Crown Output Module.PDF
08-19-14 97134  D Amp Class D Power Amplifier.PDF
08-15-14 96392  D Amp_.pdf
08-19-14 6653422  DDX Amplifier Stuff.zip
08-21-14 26020  DIY1.pdf
08-20-14 216987  Demand Switched Power Supply for Amplifiers.pdf
08-21-14 11956  Design Of A Car Power Amp.ZIP
08-19-14 505744  Diagnosing Automotive Faults with Class D Audio Amplifiers - Maxim.mht
08-20-14 70245  Digital Amplifiers Challenge Analogue Audiophiles.PDF
08-13-14 503004  Digital Does Analog.pdf
08-19-14 63804  Digital Power Amplification Based On Pulse-Width Modulation And Sigma-Delta Loops.pdf
07-27-14 63804  Digital Power Amplification based on Pulse-Width Modulation and Sigma-Delta Loops.pdf
08-21-14 1572389  Digital Power Amplifier.PDF
08-21-14 122903  Diode Only Audio Power Amplifier.pdf
08-20-14 53773  Direct1.JPG
08-20-14 28095  Discrete Class D Amp Front End V2.JPG
08-21-14 28939  Discrete Class D Amp Front End.JPG
08-13-14 30612  Drive Circuit.pdf
08-19-14 120707  Efficient Pa Amplifier.PDF
08-19-14 57957  Efficient Speech Only Amplifier.PDF
08-16-14 12459  Gain Control Devices, Side Chains, Audio Amplifiers.ZIP
08-21-14 207872  HIP4080A.pdf
08-13-14 13864  HUYGENS MCD TECHNOLOGY.mht
08-11-14 182122  HV Floating MOS-Gate Driver ICs AN-978.pdf
08-19-14 996352  High Efficiency Power Amplifier Design.PDF
08-11-14 996352  High Efficiency Power Amplifier Design.pdf
08-19-14 95250  High Fidelity Switching Power Amplifiers AN1042-D.PDF
08-21-14 1077248  High Power Class D Audio Power Amplifier Using Ir2011S.pdf
08-21-14 1077248  High Power Class D Audio Power Amplifier using IR2011S.pdf
08-21-14 3299564  High Power Class-D Audio Amplifier Using the IR2011S.pdf
08-19-14 1088502  High Power FET Audio Amplifier.pdf
08-21-14 116551  High power, high quality discrete Class D amplifier 75015527.pdf
08-21-14 204800  Hip4080A Class-D Power Amplifier Driver Ic.PDF
08-07-14 207872  Hip4080A.pdf
08-19-14 658062  Hypex Instructions.zip
08-11-14 112937  Hypex Ucd180 Amplifier Connection Diagram.PDF
08-11-14 56795  IR Amp.pdf
08-20-14 1659983  IR Reference Design - Half Bridge.pdf
08-21-14 57290  IR2011 and IRS2011 Comparison.pdf
08-13-14 64921  IRS20954S and IRS20955S Comparison AN-1129.pdf
08-21-14 1660928  Ir Reference Class D Amp Design.PDF
08-11-14 1659983  Ir Reference Design - Half Bridge.pdf
08-21-14 1974045  JBL 1500Array sm.pdf
08-19-14 40328  Jam Technologies Amplifier.PDF
08-19-14 1430749  LM4682 10 Watt Stereo CLASS D Audio Power Amplifier.pdf
08-19-14 114688  LX1720 High-Efficiency Amplifier.pdf
08-21-14 660588  Layout Guidelines for Class D Power Amplifiers.pdf
07-22-14 663545  Layout Guidelines for TPA300x Series Parts.pdf
08-22-14 1244588  Layout Issues for Class D amps.xps
07-29-14 180962  Leapfrog Switching Amplifier Control Loop Design.PDF
08-21-14 130956  Leapfrog Switching Amplifier Control Loop Design.pdf.FILEPART
08-19-14 73728  Leapfrog.pdf
08-21-14 214016  Listening To Class-D.pdf
08-08-14 214016  Listening to Class-D.pdf
08-21-14 199680  Low Power Pwm Circuit And More.PDF
07-29-14 114688  Lx1720 High-Efficiency Amplifier.pdf
08-19-14 2591229  MCD Class D Power Amplifier TECHNOLOGY.xps
07-28-14 44012  MIC5011.PDF
08-16-14 26618  MOSFET Drive.pdf
08-21-14 239616  MOSFET selection guide.pdf
03-15-14 2846296  MUETA􀂮 CLASS-D.zip
08-21-14 451584  Magnatec Class D Amp Application Info.pdf
08-21-14 221184  Magnatec Class D Amp Switching Power Supply.pdf
08-03-14 451584  Magnatec Class D amp application info.pdf
08-13-14 221184  Magnatec Class D amp switching power supply.pdf
08-21-14 1887269  Measuring Switch-mode Power Amplifiers.pdf
08-05-14 18432  Microdesign Amp AUX Supply.pdf
08-08-14 18432  Microdesign Amp Aux Supply.pdf
08-17-14 34816  Microdesign Amp PWM Stage.pdf
08-19-14 17408  Microdesign Amp Pre-Regulator.pdf
08-08-14 34816  Microdesign Amp Pwm Stage.pdf
08-16-14 34816  Microdesign Amp SMPS.pdf
08-11-14 34816  Microdesign Amp Smps.pdf
08-08-14 1207296  Microdesign Amp Thesis.pdf
08-19-14 1310967  Microdesign Class D Amplifier.pdf
08-19-14 193536  Monolithic Audio Mp7530.pdf
08-21-14 10129  Mosfet H-Bridge.GIF
07-21-14 239616  Mosfet Selection Guide.pdf
08-17-14 96256  ON Semi Class D paper.pdf
08-10-14 57344  Off Line Pwm Amplifier - Peavey.pdf
07-26-14 57344  Off line PWM Amplifier - Peavey.pdf
06-28-14 96256  On Semi Class D Paper.pdf
08-20-14 146623  Optimizing Output Filters For Class D Audio Amplifiers.PDF
08-10-14 116299  Output-Filter Optimization For Class-D Audio Amplifiers .PDF
08-21-14 116299  Output-Filter Optimization for Class-D Audio Amplifiers .PDF
08-05-14 1918976  PCM-PWM Conversion with feedback power buffer.pdf
08-20-14 1918976  Pcm-Pwm Conversion With Feedback Power Buffer.pdf
08-19-14 2576384  Philips Class D Amplifier Solutions.pdf
08-21-14 104374  Philips TDA1562Q_Class-H Amplifier.pdf
08-04-14 104374  Philips Tda1562Q Class-H Amplifier.PDF
08-10-14 113835  Philips Ucd Application Note Um10155 1.pdf
08-21-14 17386  Power Amp - Class-D - 100 Watt.GIF
08-11-14 525312  Power Amp Paper.pdf
08-16-14 1081557  Power Amplifiers-Class D2.zip
08-21-14 20430  Power Amplifiers-Class_D_100W-12V.pdf
08-11-14 325379  Power Supply Considerations for Non Feedback Class D Power Amplifiers.pdf
07-10-14 892888  PowerPAD Layout Guidelines.pdf
08-19-14 8548  Proposed High Power Class-D Output Stage.GIF
08-20-14 163840  Pwm Circuit Uses One Op Amp.pdf
08-21-14 1310197  QFN Layout Guidelines.pdf
08-21-14 629084  RC Filter Box for Class-D Output Power and THD+N Measurement.pdf
08-09-14 553512  Reduce EMI from Class D Amplifiers Using New Modulation Techniques and Filter Architectures.mht
08-13-14 1936103  SG Class D amp chips.zip
07-24-14 1918976  STA120 Theory.pdf
08-20-14 6332  Self Oscillating Class D Amplifier 2.GIF
08-21-14 27386  Self Oscillating Class D Amplifier.GIF
08-21-14 13703  Self Oscillating Class D Amplifier.gif
08-10-14 36558  Self Oscillating Class D.ZIP
08-21-14 3086  Self Oscillating Pwm Modulator.GIF
08-10-14 12204  Single Supply H Bridge.PDF
08-20-14 1162512  Smpsu Amplifier.PDF
08-18-14 13659  Sorensen Amp Schematic21.PDF
08-19-14 14654  Sorensen Audio Class D Amp.PDF
08-19-14 13312  Sorenson Amp30.PDF
08-18-14 525312  Switch Mode Multi Level Power Amplifier.pdf
08-22-14 1163264  Switch Mode Power Amp.pdf
08-19-14 350304  TDA7293 120V - 100W DMOS AUDIO AMPLIFIER.pdf
08-10-14 99156  TDA8939_1.pdf
08-21-14 76040  TPA3101D2 Mono Amplifier Configuration.pdf
08-06-14 904314  TPA3120D2.pdf
08-21-14 434101  Tda7293 100W-8 Ohm.PDF
08-20-14 115477  Tda7482 25W Mono Class-D Amplifier.pdf
08-22-14 213515  Tda7490 25W + 25W Stereo Class-D Amplifier.pdf
08-17-14 241335  Testing DDX Digital Amplifers.pdf
08-21-14 241335  Testing Ddx Digital Amplifers.pdf
08-05-14 291796  Texas Class D Modulator Code Examples.pdf
08-21-14 511407  Thermal Considerations for a Class D Amplifier.mht
08-19-14 903356  Tripath3020 1.PDF
08-20-14 457847  Two AA Cells Produce Huge Audio Volume - Maxim.mht
08-19-14 88527  UCD Amplifier.pdf
08-19-14 23630  UCD2 Power Amp with HIP4081.pdf
08-19-14 281447  UcD and IMD, DIM, Slew Rate.pdf
08-19-14 58468  Voltage Gain of the UcD Modules.pdf
08-21-14 183395  Voltage Spike Measurement Technique and Specification.pdf
08-13-14 1108  WS_FTP.LOG
08-20-14 312203  What is a Class D Audio Amplifier by IR.pdf
08-21-14 300523  ZETEX 500W Subwoofer Amp.pdf
08-22-14 38848  a6rg2.jpg
08-19-14 15091  alpha.gif
08-18-14 32958  alpinedrive.gif
08-19-14 98423  class-d_amplifier_v1.1_schematics.zip
08-08-14 436  damp PIC Source files audampctrl1.zip
08-08-14 436  damp audampctrl1.zip
07-14-14 46497  filters_dos.zip
08-14-14 86992  hbmosfet.jpg
08-21-14 94440  hbridge.jpg
08-21-14 50471  interesting.jpg
08-14-14 63716  leapfrog3-4.pdf
08-18-14 41651  leapfrog5.pdf
08-21-14 23834  n-p_driver.pdf
08-21-14 47219  philips_ucd.png

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