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Mike Engelhardt
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Mike Thomas Engelhardt[1] is an American computer programmer, author, and entrepreneur.[2] He is renowned for developing the SPICE-based analog electronic circuit simulator computer software known as LTspice[3] and QSPICE.[4]
Key Information
Personal life
[edit]Mike grew up in rural Michigan. His college degrees are: Bachelors in Physics (1981) from University of Michigan (Ann Arbor, Michigan, United States); Masters in Physics (1983) from University of California, Berkeley (Berkeley, California, United States).[5]
He was Director of Simulation Development at Linear Technology, employed from March 1998 to December 2019.[5]
He is currently a managing member of Marcus Aurelius Software, which was started in January 2020.[5]
Software
[edit]Mike has written simulators since 1975. The following is a list of software which Mike was either the sole or primary developer:
- 1992 – First known port of SPICE (3E2) to Linux.[2]
- 1998 – SwitcherCAD released internally at Linear Technology.[2]
- 1999 – SwitcherCAD III released to public.[2] It ran on Windows 95, 98, 98SE, ME, NT4.0, 2K, XP.
- 2008 – LTspice IV released.[2] It ran on Windows 2K, XP, Vista, 7. A native macOS 10.7+ application was introduced in 2013.
- 2016 – LTspice XVII released.[2] It ran on 32 or 64-bit Windows 7, 8, 8.1, 10; and macOS 10.9+.
- 2023 – QSPICE beta released.[4] Initially, it is designed to run on Windows 10 and 11.
Bibliography
[edit]The following is a list of articles and patents that Engelhardt authored or coauthored.
- Articles
- Design and Characteristics of a Lens Spectrometer with Electrostatic Extraction for Electron Beam Probing; Microelectronic Engineering (Elsevier); 6 pages; March 1992.[6]
- Design and Characteristics of a Magnetic Collimating Lens Spectrometer for Electron Beam Probing; Microelectronic Engineering (Elsevier); 6 pages; February 1996.[7]
- SPICE Differentiation; LT Journal of Analog Innovation (Linear Technology); 7 pages; January 2015.[3]
- Articles (coauthor)
- Soft X-Ray Photoemission with the SSX-100 Spectrometer; Nuclear Instruments and Methods in Physics Research (Elsevier); 4 pages; May 1986.[8]
- Patents
- US Patent 7502723, filed in 2005, "Asymmetric minor hysteresis loop model and circuit simulator including the same".[1]
- US Patent 8686702, filed in 2012, "Negative slope compensation for current mode switching power supply".[9]
- US Patent 10637254, filed in 2015, "Spread spectrum for switch mode power supplies".[10]
- US Patent 9866245, filed in 2016, "Active differential resistors with reduced noise".[11]
- US Patent 10218394, filed in 2017, "Active differential resistors with reduced noise".[12]
- Patents (coauthor)
- US Patent 8274266, filed in 2009, "Switch mode power supply with dynamic topology".[13]
- US Patent 9966832, filed in 2017, "Predictive ripple-cancelling signal into error amplifier of switch mode power supply".[14]
- US Patent 10270330, filed in 2018, "Predictive ripple-cancelling signal into error amplifier of switch mode power supply".[15]
References
[edit]- ^ a b U.S. Patent 7502723.: "Asymmetric minor hysteresis loop model and circuit simulator including the same", filed September 1, 2005.
- ^ a b c d e f "LTspice Genealogy – The Heritage of Simulation Ubiquity". LTwiki. Archived from the original on December 2, 2018.
- ^ a b Engelhardt, Mike (January 2015). "SPICE Differentiation" (PDF). LT Journal of Analog Innovation. Linear Technology: 7 pages. Archived (PDF) from the original on May 17, 2018.
- ^ a b "Re-writing SPICE for a digital world". EE News Power. May 10, 2023. Archived from the original on May 14, 2023.
- ^ a b c Mike Engelhardt; LinkedIn.
- ^ Engelhardt, Mike (March 1992). "Design and Characteristics of a Lens Spectrometer with Electrostatic Extraction for Electron Beam Probing". Microelectronic Engineering. Elsevier: 6 pages.
- ^ Engelhardt, Mike (February 1996). "Design and Characteristics of a Magnetic Collimating Lens Spectrometer for Electron Beam Probing". Microelectronic Engineering. Elsevier: 6 pages.
- ^ "Soft X-Ray Photoemission with the SSX-100 Spectrometer". Nuclear Instruments and Methods in Physics Research. Elsevier: 4 pages. May 1986.
- ^ U.S. Patent 8686702.: "Negative slope compensation for current mode switching power supply", filed February 15, 2012.
- ^ U.S. Patent 10637254.: "Spread spectrum for switch mode power supplies", filed September 29, 2015.
- ^ U.S. Patent 9866245.: "Active differential resistors with reduced noise", filed August 12, 2016.
- ^ U.S. Patent 10218394.: "Active differential resistors with reduced noise", filed December 6, 2017.
- ^ U.S. Patent 8274266.: "Switch mode power supply with dynamic topology", filed August 14, 2009.
- ^ U.S. Patent 9966832.: "Predictive ripple-cancelling signal into error amplifier of switch mode power supply", filed May 9, 2017.
- ^ U.S. Patent 10270330.: "Predictive ripple-cancelling signal into error amplifier of switch mode power supply", filed May 3, 2018.
External links
[edit]- LTspice seminar with Mike Engelhardt (article) – 2011 – EDN Magazine
- Audio interview with Mike Engelhardt (1h32m audio) – 2014 – Amp Hour
- Video interview with Mike Engelhardt (8m37s video) – 2018 – Altron Arrow