Index of /Op-Amps & Comparitors/Opamps
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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
new server -
this week, we've moved the website to a bigger faster server. we have doubled the weekly download limit to 20mb and are now allowing hot-linking, so more people can get the documents they're looking for. this new server is still relatively low cost, but is a bit more to pay for each month then the last server. we still need your donations to help with this. thank you all who have supported the site and community!!!


01/24/2008
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 Discrete Opamps
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Last Accessed Size  File
07-19-18 387924  3080 Circuits.pdf
07-19-18 4329  741peak.gif
07-19-18 79780  A Cookbook Approach to Single Supply DC-Coupled Op Amp Design.pdf
07-19-18 39011  AC COUPLING INSTRUMENTATION AND DIFFERENCE AMPLIFIERS.pdf
07-19-18 105232  Absolute_Value_Mancini.jpg
07-19-18 47207  Active Filter with D-A Converter control.pdf
07-19-18 114021  Adjustable Slew Rate Amplifier.pdf
07-19-18 50869  Analog Divider and Multiplier.pdf
07-19-18 271250  Analog Divider.pdf
07-19-18 1560100  Analog back to the future Part 1.pdf
07-19-18 238349  Audio Applications Of Linear Ics.pdf
07-19-18 330294  Avoiding Noise and Power Problems with Unused Op Amps.mht
07-19-18 953515  Avoiding Passive Component Pitfalls.pdf
07-19-18 224208  Bodywork Checker.pdf
07-19-18 22781  Broad-Band-Peak-detector-using-LM393.jpg
07-19-18 39727  Burr Brown Ac Coupling Instrumentation And Difference Amplifiers - Ina117 App Note.pdf
07-19-18 33089  CLASSICAL OP AMP OR CURRENT-FEEDBACK OP AMP.pdf
07-19-18 111783  Calculating Sum and Difference Networks.pdf
07-19-18 624596  Choosing Op Amps for DC Servo.mht
07-19-18 197880  Common Mode Voltage Cancelling Amplifier.pdf
07-19-18 314906  Controllable Inverting-NonInverting Circuit.pdf
07-19-18 73368  Controlling Opamp gain with one potentiometer.pdf
07-19-18 2714463  Current Amps and Feedback.mht
07-19-18 139250  Current Feedback Amplifier Do's & Don'ts.pdf
07-19-18 71477  Current Source Enables Op Amp's Output to go to Ground.pdf
07-19-18 21893  DOUBLE THE OUTPUT CURRENT TO A LOAD.pdf
07-19-18 49649  Dc Level Clamp.pdf
07-19-18 534241  Design Trade-Offs for Single-Supply Op Amps.mht
07-19-18 322527  Designing With Opamps.PDF
07-19-18 502603  Designing with monostable multivibrators.pdf
07-19-18 94427  Determining the Dynamic Range of Logarithmic Amplifiers.pdf
07-19-18 31475  Differential input & output circuit on a single supply.pdf
07-19-18 111466  Digitally Programmable Instrumentation Amplifier.pdf
07-19-18 89814  Dual Feedback Amplifier Zeros Comparitor Hysteresis.pdf
07-19-18 105727  Dual Op Amp Instrumentation Amp.pdf
07-19-18 378663  EPOT Applications Gain Adjustment in Op-Amp Circuits.mht
07-19-18 315051  Engineer's Stethoscope.pdf
07-19-18 205353  Feed it Forward.pdf
07-19-18 4256067  Feedback Amplifiers Commentary.pdf
07-19-18 20693  Feedforward Amplifier.pdf
07-19-18 477139  Flexible Gain Programmable Op-Amp.pdf
07-19-18 141189  Fully Differential Op Amps Made Easy.pdf
07-19-18 450093  Gas Monitor.pdf
07-19-18 73130  Get More Power Out of Dual or Quad Op-Amps.pdf
07-19-18 373433  Getting Started with Op-Amps.pdf
07-19-18 2103557  Handbook Of Op-Amp Apps.pdf
07-19-18 24546  High Input Impedance Integrator.pdf
07-19-18 16918  High Performance Audio Op-Amp Quick Reference.pdf
07-19-18 55512  High Quality Instrumentation Amplifier.pdf
07-19-18 5348029  High Speed Amplifier Techniques from Linear Technology.pdf
07-19-18 330334  High-Performance Audio Applications of the LM833.pdf
07-19-18 149482  Improved Clamping Amplifier.pdf
07-19-18 141029  Increasing opamp output voltage swing.pdf
07-19-18 283126  Integrators.pdf
07-19-18 453017  Interfacing LVDS.pdf
07-19-18 48167  LM324 Interface Circuits.pdf
07-19-18 118776  Level Shifter to Build a High Voltage Op-Amp.pdf
07-19-18 309618  Log Amps.pdf
07-19-18 56002  Low Cost Logarithmic Amplifier.pdf
07-19-18 16117  Low Drift Integrator.pdf
07-19-18 143525  Low Voltage Micropower Op-Amps.pdf
07-19-18 1068085  Measuring an Op-Amp's Real Time Offset Voltage.pdf
07-19-18 806659  Misc Op Amp Applications Part 4.pdf
07-19-18 12048  Monolithic Sample & Hold.pdf
07-19-18 81966  Multiplying Rc Time Constants With Op-Amps.pdf
07-19-18 202045  National Semiconductor Application Guide For Op Amps.pdf
07-19-18 303251  New Op Amp Ideas.pdf
07-19-18 37629  Obtaining Average Absolute Value.pdf
07-19-18 12166  One Diode Full Wave Rectifier.pdf
07-19-18 148581  One OpAmp Dual Limit Comparitor.pdf
07-19-18 176099  Op Amp Booster Designs.pdf
07-19-18 1012024  Op Amp Circuit Collection.pdf
07-19-18 226444  Op Amp Circuits.mht
07-19-18 186599  Op Amp Injection for Bode Analysis.pdf
07-19-18 202277  Op Amp Noise Analysis.pdf
07-19-18 178743  Op Amp Noise.pdf
07-19-18 68936  Op Amp Power Output Stage.pdf
07-19-18 2963988  Op Amps - Misc.pdf
07-19-18 2061665  Op Amps For Everyone.pdf
07-19-18 115607  Op Amps Quiz.mht
07-19-18 28012  Op Latch.zip
07-19-18 149216  Op amp Characteristics.mht
07-19-18 179622  Op amp Packages.mht
07-19-18 123561  Op amp Voltage Amplifiers.mht
07-19-18 2083840  Op amps for everyone design reference from TI.pdf
07-19-18 1760767  Op amps with capacitive loads.mht
07-19-18 203122  Op-Amp Audio Applications.pdf
07-19-18 985824  Op-Amp Circuit Collection.pdf
07-19-18 138451  Op-Amp Flip Flops.pdf
07-19-18 7730  Op-Amp Oscillator.pdf
07-19-18 157514  Op-Amps in Pre-Amps.pdf
07-19-18 2291841  Op-amps based full-wave rectifier___ - STMicroelectronics.mht
07-19-18 110486  Op275 Opamp.PDF
07-19-18 315692  Operational Amplifiers Glossary of Key Terms.mht
07-19-18 208651  Operational amplifier models Operational Amplifiers.mht
07-19-18 519401  Operational_Amplifiers_final.pdf
07-19-18 106358  Output Impedance Stuff Part 1.pdf
07-19-18 172723  PC300 - Quiz - Intro to Op Amps.mht
07-19-18 103072  PRECISION ABSOLUTE VALUE CIRCUITS.pdf
07-19-18 147335  PRECISION_ABSOLUTE_VALUE - Basic_Circuit - Circuit Diagram - SeekIC_com.mht
07-19-18 300087  Peak Detectors.pdf
07-19-18 62157  Philbrick Op Amp.jpg
07-19-18 249584  Polarity Indicator.pdf
07-19-18 11478  Precision Half-Wave Ac-Dc Converter.pdf
07-19-18 38111  Precision Rectifier.zip
07-19-18 877358  Precision Rectifiers.pdf
07-19-18 11873  Precision Unity-Gain Half-Wave Rectifier.pdf
07-19-18 655554  Precision full wave rectifier circuit - HQEW_net.mht
07-19-18 85546  Program an Op Amp with a Solid State Resistor.pdf
07-19-18 66463  Programmable inverting - noninverting opamp.pdf
07-19-18 24410  Pulse Train Generator.pdf
07-19-18 163840  Pwm Circuit Uses One Op Amp.pdf
07-19-18 346224  Reduce Distortion with CSP Package opaamps.pdf
07-19-18 59087  Reducing Auto Zero Amplifier Noise.pdf
07-19-18 67901  Remotely Gain Switched Op Amps.pdf
07-19-18 151727  Resistive Feedback Circuits.pdf
07-19-18 145481  Resistor Free Instrumentation Amplifier.pdf
07-19-18 1730787  Resistors in the feedback of a buffer Ask why!.mht
07-19-18 1036809  Rolling Stone Issue 1000 Cover Guide.pdf
07-19-18 17105  Sample & Hold Circuits.pdf
07-19-18 1211107  Sample & Hold with no resistors.pdf
07-19-18 1115508  Sample and Hold Circuits.pdf
07-19-18 671417  Selecting Video Opamps.pdf
07-19-18 29826  Simple Chopper.pdf
07-19-18 379923  Simple Spice Op-Amp Simulation.pdf
07-19-18 55869  Simple Temperature Regulator.pdf
07-19-18 17940  Single device window detector.pdf
07-19-18 153569  Single-supply op amp design.pdf
07-19-18 335382  Single-supply op amp forms noninverting level shifter - Maxim.mht
07-19-18 68944  Some Tips On Stabilizing Op-Amps.pdf
07-19-18 124435  Some Tips on Stabilizing Op-Amps (2).pdf
07-19-18 341734  Spare Op Amp Generates Its Own Regulated Negative Supply.mht
07-19-18 83410  Super Precise Precision Rectifier.pdf
07-19-18 124331  Supercharging the 709 Op Amp.pdf
07-19-18 1164004  Suspended Animation.pdf
07-19-18 338507  Temperature Stabilized Log Converter.pdf
07-19-18 425548  The 1537 VCA.pdf
07-19-18 78158  The Full-Wave Rectifier and Averaging Filter - Freecircuits_net.mht
07-19-18 207816  The Gyrator.pdf
07-19-18 124435  Tips On Stabilizing Op Amps.pdf
07-19-18 137506  Tl072 Opamp.PDF
07-19-18 1573936  Top questions on op amp power dissipation – Part 1.mht
07-19-18 83385  Trans-Impedance Amplifiers Noise Issues.pdf
07-19-18 81519  Transimpedance Amplifier Stability.pdf
07-19-18 35589  True RMS Detector.pdf
07-19-18 26132  Tube Op-Amp.jpg
07-19-18 74729  Tube Op-Amp.png
07-19-18 38497  Two Amplifier Integrator.pdf
07-19-18 829267  Understanding opamp input stages.mht
07-19-18 103828  Use The Lm358 Dual, Single Supply Op Amp.pdf
07-19-18 92337  Using Free Amplifiers.pdf
07-19-18 202501  Using supply bootstrapping to reduce distortion in op-amp circuits.pdf
07-19-18 107975  Variable Gain Precision Rectifier.pdf
07-19-18 62313  Very High Input Impedance Op-Amp Circuit.pdf
07-19-18 2173092  Voltage to Current Transactor.pdf
07-19-18 1389079  Wideband Peak Detector.pdf
07-19-18 1503006  Working with OTAs.pdf
07-19-18 42478  Zero Crossing Detector.pdf
07-19-18 18725  circuit-peak-detector.jpg
07-19-18 1518  peak.gif
07-19-18 614  peak.jpg

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