http://www.techbites.com/ 2264-660 /201003052264/myblog/blog/z0007-videos-show-xmax-being-put-to-the-test.html Tue, 06 Dec 2011 18:07:25 -0600 1249-657 /200911241249/myblog/blog/z001d-join-my-green-energy-mafia-can-social-gaming-teach-us-about-a-sustainable-future.html Mon, 30 May 2011 21:50:03 -0500 3208-656 /201012173208/myblog/blog/z000d-brian-bailey-disagrees-with-the-experts-on-ip-integration.html Sun, 03 Apr 2011 16:27:44 -0500 2773-655 /201006042773/myblog/blog/z0002-cool-beans-nasa-says-that-voyager-2-is-back-online.html Fri, 17 Dec 2010 05:07:27 -0600 3188-654 /201012023188/myblog/blog/z000e-commentary-big-brother-is-watching-your-driving-habits.html Wed, 15 Dec 2010 00:20:59 -0600 3170-653 /201011193170/myblog/blog/z001f-the-great-chicken-nugget-cake-caper-adventures-in-stealth-cuisine.html Tue, 14 Dec 2010 22:47:54 -0600 3154-652 /201011093154/myblog/blog/z000e-forgive-me-for-tooting.html Thu, 25 Nov 2010 21:49:10 -0600 2414-649 /201003242414/myblog/blog/z000a-is-3dtv-an-experiment.html Mon, 22 Nov 2010 12:14:55 -0600 3136-646 /201011013136/myblog/blog/z0023-is-intel-acknowledging-the-future.html Tue, 02 Nov 2010 05:08:03 -0500 3119-645 /201010213119/myblog/blog/z0023-this-one-appears-not-to-have-an-arm-or-a-leg.html Mon, 25 Oct 2010 16:40:36 -0500 2925-644 /201008042925/myblog/blog/z000c-non-cool-beans-hackers-in-our-hardware.html Thu, 30 Sep 2010 05:06:23 -0500 2998-643 /201009072998/myblog/blog/z0019-vdc-says-virtual-prototypes-may-not-be-delivering.html 15%) speaks volumes. The tools are not hard to use (for the embedded developer handed a platform), so what holds up faster growth? The availability of models! I agree that virtual prototypes are helping us keep pace with increasing technology. In addition I have the opinion that we do ourselves a disservice when we keep harping on the primary benefit of pre-silicon emulation and schedule saving without giving similar words to the quality improvements in the embedded system (warning messages), deterministic behavior, control-ability, fault injection, ability to pause/resume the stimuli and actuators, deep inspection of the system and regression capabilities. Now for the shameful plug: "How to make virtual prototyping better than designing with hardware" by Everett Lumpkin and Casey Alford Part 1: http://www.embedded-systems.com/design/225701094 Part 2: http://www.embedded-systems.com/design/225701109 ]]> Wed, 08 Sep 2010 01:09:53 -0500 2992-642 /201009032992/myblog/blog/z000e-experts-have-catfight-at-the-table.html Fri, 03 Sep 2010 17:18:12 -0500 1530-641 /200912211530/myblog/blog/z000c-systemc-and-transaction-level-modeling-tlm.html Tue, 31 Aug 2010 01:50:58 -0500 2974-640 /201008232974/myblog/blog/z000d-what-do-you-get-if-you-cross-falcon-with-eda-360.html Wed, 25 Aug 2010 00:28:34 -0500 2974-639 /201008232974/myblog/blog/z000d-what-do-you-get-if-you-cross-falcon-with-eda-360.html Tue, 24 Aug 2010 04:50:03 -0500 2972-638 /201008182972/myblog/blog/z0002-webinar-ultra-tiny-linux-os-for-smartfusion-mixed-signal-fpgas.html Fri, 20 Aug 2010 12:26:00 -0500 2928-637 /201008052928/myblog/blog/z0002-win-a-free-actel-smartfusion-mixed-signal-fpga-evaluation-kit.html Fri, 06 Aug 2010 21:00:10 -0500 2926-636 /201008052926/myblog/blog/z000d-march-1966.html Fri, 06 Aug 2010 17:58:23 -0500 2927-635 /201008052927/myblog/blog/z000c-verilog-fullcase-and-parallelcase-synthesis-directives.html Fri, 06 Aug 2010 08:22:45 -0500 2927-634 /201008052927/myblog/blog/z000c-verilog-fullcase-and-parallelcase-synthesis-directives.html Thu, 05 Aug 2010 20:09:44 -0500 2927-633 /201008052927/myblog/blog/z000c-verilog-fullcase-and-parallelcase-synthesis-directives.html Thu, 05 Aug 2010 14:02:44 -0500 2922-632 /201008032922/myblog/blog/z000d-specifying-concurrency.html Thu, 05 Aug 2010 02:57:53 -0500 2906-631 /201007282906/myblog/blog/z000c-where-should-a-young-engineer-go-to-learn-about-verification.html Tue, 03 Aug 2010 10:22:16 -0500 2910-630 /201007292910/myblog/blog/z000c-pcb-101-new-series-of-articles.html Mon, 02 Aug 2010 18:57:10 -0500 2914-629 /201007302914/myblog/blog/z0002-funny-beans-maintaining-to-do-lists-im-afraid-i-told-a-lie.html ) Errr... ahem... BTW - I'm a big fan of www.rememberthemilk.com (primarily for their website interface; I have the iPhone app but use it infrequently). ]]> Mon, 02 Aug 2010 17:45:59 -0500 2906-628 /201007282906/myblog/blog/z000c-where-should-a-young-engineer-go-to-learn-about-verification.html Mon, 02 Aug 2010 17:22:08 -0500 2906-627 /201007282906/myblog/blog/z000c-where-should-a-young-engineer-go-to-learn-about-verification.html Sat, 31 Jul 2010 02:40:59 -0500 2906-626 /201007282906/myblog/blog/z000c-where-should-a-young-engineer-go-to-learn-about-verification.html Fri, 30 Jul 2010 04:55:53 -0500 2906-625 /201007282906/myblog/blog/z000c-where-should-a-young-engineer-go-to-learn-about-verification.html Thu, 29 Jul 2010 06:20:39 -0500 2662-624 /201005032662/myblog/blog/z0013-neat-videos-future-dashboardstomorrows-green-hmis.html Tue, 27 Jul 2010 05:25:12 -0500 2894-623 /201007212894/myblog/blog/z000d-new-book-tlm-driven-design-and-verification-methodology.html Wed, 21 Jul 2010 21:04:19 -0500 2885-622 /201007192885/myblog/blog/z0002-cool-beans-all-the-good-ideas-havent-been-taken-yet.html Tue, 20 Jul 2010 14:07:01 -0500 2869-620 /201007082869/myblog/blog/z0022-cool-beans-making-my-own-pcb-or-not.html Wed, 14 Jul 2010 14:58:24 -0500 2859-619 /201007072859/myblog/blog/z0002-cool-beans-prototype-steampunk-pseudo-coal-fired-furnace-works.html Wed, 07 Jul 2010 09:25:04 -0500 2840-618 /201006282840/myblog/blog/z000e-mentor-management-tries-to-protect-itself.html Mon, 28 Jun 2010 23:01:35 -0500 2819-617 /201006222819/myblog/blog/z000d-dac-attendance-falling.html Mon, 28 Jun 2010 17:51:01 -0500 2833-616 /201006242833/myblog/blog/z0002-altera-delivers-single-chip-fpga-solution-for-hd-wdr-surveillance-cameras.html Mon, 28 Jun 2010 17:22:22 -0500 2827-615 /201006242827/myblog/blog/z000d-education-is-a-two-way-problem.html Sat, 26 Jun 2010 06:16:47 -0500 2834-614 /201006242834/myblog/blog/z000c-cool-beans-using-skype-for-screen-sharing-and-other-stuff.html Fri, 25 Jun 2010 17:58:42 -0500 2794-613 /201006102794/myblog/blog/z000d-synfora-bites-the-dust.html Fri, 18 Jun 2010 15:47:40 -0500 2804-612 /201006162804/myblog/blog/z000d-false-anticipation.html Wed, 16 Jun 2010 18:33:34 -0500 2775-611 /201006072775/myblog/blog/z000e-brian-baileys-must-see-list-for-dac-2010.html Fri, 11 Jun 2010 22:38:36 -0500 2787-610 /201006092787/myblog/blog/z0022-cool-beans-5v-30a-power-supplies-for-only-5.html Thu, 10 Jun 2010 13:14:51 -0500 2775-609 /201006072775/myblog/blog/z000e-brian-baileys-must-see-list-for-dac-2010.html Wed, 09 Jun 2010 21:47:46 -0500 2774-608 /201006072774/myblog/blog/z0000-calypto-goes-a-little-loopy-and-loses-its-memory.html Wed, 09 Jun 2010 21:11:13 -0500 2772-606 /201006032772/myblog/blog/z0002-yes-mentor-introduces-rad-tolerant-fpga-synthesis.html Wed, 09 Jun 2010 06:00:31 -0500 2775-605 /201006072775/myblog/blog/z000e-brian-baileys-must-see-list-for-dac-2010.html Mon, 07 Jun 2010 15:49:19 -0500 2768-604 /201006032768/myblog/blog/z000e-agnisys-closes-the-loop-on-requirements.html Thu, 03 Jun 2010 19:27:26 -0500 2742-603 /201005212742/myblog/blog/z000c-cool-beans-noise-cancelling-bluetooth-headset-for-my-cell-phone.html Thu, 03 Jun 2010 12:34:58 -0500 2763-602 /201006022763/myblog/blog/z000d-there-is-vc-funding-for-eda-startups.html Wed, 02 Jun 2010 23:08:12 -0500 2757-601 /201006012757/myblog/blog/z000e-is-synopsys-getting-ready-to-buy-eve.html Wed, 02 Jun 2010 06:40:44 -0500 2743-600 /201005262743/myblog/blog/z000e-did-you-want-a-simulator-with-that-fpga.html Thu, 27 May 2010 22:06:06 -0500 2737-599 /201005202737/myblog/blog/z0002-hurray-coldfire-processor-cores-for-tabulas-new-abax-fpgas.html Fri, 21 May 2010 01:09:08 -0500 2732-598 /201005192732/myblog/blog/z000e-verilog-simulator-available-for-the-mac.html Thu, 20 May 2010 01:14:14 -0500 2708-597 /201005132708/myblog/blog/z000c-eeeek-cadence-is-going-to-acquire-denali.html Wed, 19 May 2010 18:44:43 -0500 2713-596 /201005142713/myblog/blog/z0022-problems-testing-your-circuit-boardsystem-kozio-has-the-answer.html Wed, 19 May 2010 16:56:01 -0500 2713-595 /201005142713/myblog/blog/z0022-problems-testing-your-circuit-boardsystem-kozio-has-the-answer.html Tue, 18 May 2010 21:32:48 -0500 2603-594 /201004222603/myblog/blog/z0002-video-free-smartfusion-mixed-signal-fpga-eval-kit.html Mon, 17 May 2010 21:50:39 -0500 2704-593 /201005122704/myblog/blog/z0019-people-problems.html Mon, 17 May 2010 13:15:33 -0500 2713-592 /201005142713/myblog/blog/z0022-problems-testing-your-circuit-boardsystem-kozio-has-the-answer.html Sat, 15 May 2010 15:29:48 -0500 2682-591 /201005072682/myblog/blog/z0022-avatech-the-pcb-designer-needs-a-name.html Fri, 14 May 2010 22:07:51 -0500 2713-590 /201005142713/myblog/blog/z0022-problems-testing-your-circuit-boardsystem-kozio-has-the-answer.html Fri, 14 May 2010 21:16:37 -0500 2688-589 /201005102688/myblog/blog/z000e-youre-only-as-fast-as-your-slowest-communications.html Tue, 11 May 2010 21:41:29 -0500 2688-588 /201005102688/myblog/blog/z000e-youre-only-as-fast-as-your-slowest-communications.html Tue, 11 May 2010 21:32:20 -0500 2682-587 /201005072682/myblog/blog/z0022-avatech-the-pcb-designer-needs-a-name.html Tue, 11 May 2010 11:52:58 -0500 2682-586 /201005072682/myblog/blog/z0022-avatech-the-pcb-designer-needs-a-name.html Mon, 10 May 2010 12:56:28 -0500 2680-585 /201005062680/myblog/blog/z0000-evs-may-offer-only-bland-driving.html Sat, 08 May 2010 18:13:12 -0500 2654-584 /201005032654/myblog/blog/z000e-new-debug-capabilities-from-mentor-arm-and-lauterbach.html Sat, 08 May 2010 05:28:40 -0500 2680-583 /201005062680/myblog/blog/z0000-evs-may-offer-only-bland-driving.html Fri, 07 May 2010 15:25:42 -0500 2642-582 /201004292642/myblog/blog/z000d-cadence-outlines-vision-with-eda360.html Thu, 29 Apr 2010 22:28:29 -0500 2520-581 /201004062520/myblog/blog/z000a-network-neutrality-struck-down.html Thu, 29 Apr 2010 21:54:46 -0500 2638-580 /201004272638/myblog/blog/z0002-xilinx-unveils-new-class-of-device-an-extensible-processing-platform.html Wed, 28 Apr 2010 00:27:15 -0500 2627-579 /201004262627/myblog/blog/z000e-cadence-announces-verification-computing-platform.html Mon, 26 Apr 2010 23:28:04 -0500 2619-577 /201004232619/myblog/blog/z000c-amazing-beans-video-of-mandatory-exercise-program-for-sedentary-engineers.html Fri, 23 Apr 2010 16:14:15 -0500 2597-576 /201004212597/myblog/blog/z000d-synopsys-actel-press-release-fails-to-deliver.html Fri, 23 Apr 2010 03:00:57 -0500 2587-575 /201004192587/myblog/blog/z000c-fluffy-spider-technologies-fst-to-demo-at-esc.html Tue, 20 Apr 2010 04:59:23 -0500 2582-574 /201004192582/myblog/blog/z0002-writing-4-engineers-grammar-and-punctuation-in-general.html Mon, 19 Apr 2010 19:44:59 -0500 2565-573 /201004162565/myblog/blog/z0000-sound-design-needed.html Fri, 16 Apr 2010 23:34:03 -0500 2266-572 /201003052266/myblog/blog/z0022-hurray-esc-india-2010-here-i-come.html Thu, 15 Apr 2010 17:57:31 -0500 2558-570 /201004142558/myblog/blog/z0028-review-new-on-line-filter-design-tool-yields-quick-first-cut-results.html 100:1. What I found, was that if I sequence the gains from low to high while also sequencing the required Q’s from high to low (in going from input to output), I got a better clustering for required amplifier Bandwidths and therefore a better chance of being able to do the design with the same part – where that part is not just massive overkill speed wise as you see in some of the tools. Now I know there is a bias towards putting all the gain up front for “spot” noise reasons. However, with the strategy we implemented here, I didn’t want much gain in the highest Q first stage but I did want the lower Q poles and more gain towards the end of multi-stage designs. Doing that, we get considerable lower “integrated noise” I don’t have the horsepower to try to write an optimization routine for this, but if you look at Appendix 3 in the users guide we tried to illustrate this where it is pretty easy to see that the higher Q stages always produce a high noise peak in and of themselves – if these are towards the end of the filter chain you get this peaked broadband noise that will integrate to a higher RMS noise than what we get with the strategy we used. Another issue that our segmentation strategy helps is the buildup of overshoot issues going through a filter. One thing often missed is that it is actually pretty easy to clip the output or input in a multi-stage filter design. In filters with >1 gain, putting most of the overshoot first (with the highest Q stage operating at low gains) and then essentially rolling off that overshoot in the later stages seems to help this. Again, I am very far from claiming what we have here is “optimum” but it seems to achieve a nice compromise for the issues I mentioned here. That was the main issue you noticed and I was expecting some consternation on the choices we made. On some of your other comments, One option to try other gain and Q sequencing is to let the semi-automatic flow do its thing, then use the manual flow to adjust that to what you might believe would work better. Your comment on the max. gain of 5 in a manual design flow, where you expected a gain of 10. I suspect this is where you had done a 3 stage (5th order) design then jumped back to the beginning to try a manual design. It probably thought you were still doing a 3 stage design where it does limit to a gain of 5 maximum in each stage. I did try this, jumping back to the Requirements page after doing a 5th order design, you have to be careful to change the order to 4 when you switch to manual entry. Michael Steffes, iSim Active Filter Design team lead. ]]> Wed, 14 Apr 2010 21:27:48 -0500 2545-567 /201004122545/myblog/blog/z000e-you-have-to-innovate-in-areas-that-really-matter.html Mon, 12 Apr 2010 18:26:13 -0500 2519-566 /201004062519/myblog/blog/z000c-cool-beans-now-thats-what-i-call-customer-service.html Mon, 12 Apr 2010 15:21:27 -0500 2531-565 /201004072531/myblog/blog/z0000-cadence-and-virage-put-out-obfuscated-message-for-their-seminar.html Wed, 07 Apr 2010 21:55:57 -0500 2506-563 /201004052506/myblog/blog/z000c-reason-4-to-customize-a-processor-core-use-an-automated-process.html Tue, 06 Apr 2010 16:35:38 -0500 2512-562 /201004062512/myblog/blog/z0028-gentlemen-start-your-pens-42nd-north-american-power-symposium-calls-for-papers.html Tue, 06 Apr 2010 15:29:58 -0500 2506-561 /201004052506/myblog/blog/z000c-reason-4-to-customize-a-processor-core-use-an-automated-process.html Tue, 06 Apr 2010 14:54:06 -0500 2421-560 /201003252421/myblog/blog/z000e-itrs-roadmap-and-formal-verification-jasper-design.html Fri, 02 Apr 2010 17:39:04 -0500 2488-558 /201004012488/myblog/blog/z001d-techbites-unvells-eco-friendly-new-print-edition-part-of-a-global-carbon-sequestration-initiative.html Thu, 01 Apr 2010 18:51:22 -0500 2448-557 /201003292448/myblog/blog/z000e-has-there-really-been-no-progress-in-analog.html Wed, 31 Mar 2010 21:25:59 -0500 2449-556 /201003292449/myblog/blog/z000c-cool-beans-yet-another-mind-boggling-video.html Tue, 30 Mar 2010 02:05:48 -0500 2448-555 /201003292448/myblog/blog/z000e-has-there-really-been-no-progress-in-analog.html Tue, 30 Mar 2010 00:50:49 -0500 2442-554 /201003292442/myblog/blog/z0030-the-cost-of-ip-integration-is-rising-dramatically.html Mon, 29 Mar 2010 23:38:40 -0500 2440-553 /201003292440/myblog/blog/z000d-must-read-for-hardware-designersmanagers-considering-cc-synthesis.html Mon, 29 Mar 2010 23:05:48 -0500 2440-552 /201003292440/myblog/blog/z000d-must-read-for-hardware-designersmanagers-considering-cc-synthesis.html Mon, 29 Mar 2010 13:57:32 -0500 2341-551 /201003162341/myblog/blog/z000e-survey-of-the-value-of-formal-verification-in-japan.html Fri, 26 Mar 2010 19:32:47 -0500 2435-550 /201003262435/myblog/blog/z000d-brian-bailey-says-adoption-of-esl-is-going-just-fine.html Fri, 26 Mar 2010 17:11:00 -0500 2432-549 /201003252432/myblog/blog/z000c-techtronix-launches-online-community-for-oscilloscope-users-free-scope.html Fri, 26 Mar 2010 08:10:15 -0500 2432-548 /201003252432/myblog/blog/z000c-techtronix-launches-online-community-for-oscilloscope-users-free-scope.html Thu, 25 Mar 2010 23:05:56 -0500 2345-547 /201003172345/myblog/blog/z003d-announcing-the-new-hwfw-interface-community.html Wed, 24 Mar 2010 21:21:36 -0500