<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
     xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
     xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <atom:link href="https://eerefresher.mirarver.com/feed.xml" rel="self" type="application/rss+xml"/>
    <title>EE Refresher</title>
    <link>https://eerefresher.mirarver.com/</link>
    <language>en-us</language>
    <itunes:author>EElessons</itunes:author>
    <description><![CDATA[A graduate-level electrical-engineering refresher-and-catch-up course you listen to like a book. Each episode re-derives a core idea, then brings it current to today's industry standard, and ends with a self-test to turn listening into skill. Hosted by Elena and Marcus. Companion app: CircuitQuEEst (free, offline Android) teaches the foundations each episode builds on.]]></description>
    <itunes:summary><![CDATA[A graduate-level electrical-engineering refresher-and-catch-up course you listen to like a book. Each episode re-derives a core idea, then brings it current to today's industry standard, and ends with a self-test to turn listening into skill. Hosted by Elena and Marcus. Companion app: CircuitQuEEst (free, offline Android) teaches the foundations each episode builds on.]]></itunes:summary>
    <itunes:subtitle>Graduate EE, brought current.</itunes:subtitle>
    <itunes:type>serial</itunes:type>
    <itunes:explicit>false</itunes:explicit>
    <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    <image>
      <url>https://eerefresher.mirarver.com/cover.jpg</url>
      <title>EE Refresher</title>
      <link>https://eerefresher.mirarver.com/</link>
    </image>
    <itunes:owner>
      <itunes:name>Michael Altamirano</itunes:name>
      <itunes:email>podcast@mirarver.com</itunes:email>
    </itunes:owner>
    <itunes:category text="Technology"/>
    <itunes:category text="Education"/>
    <itunes:category text="Science"/>
    <item>
      <title>5. Battery SOC: Coulomb Counting vs. Kalman Estimation</title>
      <itunes:title>Battery SOC: Coulomb Counting vs. Kalman Estimation</itunes:title>
      <itunes:season>1</itunes:season>
      <itunes:episode>5</itunes:episode>
      <itunes:episodeType>full</itunes:episodeType>
      <itunes:subtitle>Why your battery gauge is secretly running an optimal estimator.</itunes:subtitle>
      <description><![CDATA[State of charge can't be measured directly. Coulomb counting drifts; open-circuit-voltage lookup fails under load. The Kalman filter blends them: an equivalent-circuit model whose predict step is coulomb counting and whose gain optimally trusts the voltage measurement against the drifting model. Then EKF vs. UKF for the nonlinearity, and dual estimation that tracks aging — state of health. Season 1 finale. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Battery & Energy Storage, Electric Vehicles, Sensors & Measurement.]]></description>
      <itunes:summary><![CDATA[State of charge can't be measured directly. Coulomb counting drifts; open-circuit-voltage lookup fails under load. The Kalman filter blends them: an equivalent-circuit model whose predict step is coulomb counting and whose gain optimally trusts the voltage measurement against the drifting model. Then EKF vs. UKF for the nonlinearity, and dual estimation that tracks aging — state of health. Season 1 finale. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Battery & Energy Storage, Electric Vehicles, Sensors & Measurement.]]></itunes:summary>
      <enclosure url="https://eerefresher.mirarver.com/Episode5.mp3?v=edc00296" length="11791803" type="audio/mpeg"/>
      <guid isPermaLink="false">eerefresher-s1e5</guid>
      <pubDate>Tue, 16 Jun 2026 14:00:00 -0700</pubDate>
      <itunes:duration>00:16:17</itunes:duration>
      <itunes:explicit>false</itunes:explicit>
      <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    </item>
    <item>
      <title>4. From FinFET to Gate-All-Around Nanosheets</title>
      <itunes:title>From FinFET to Gate-All-Around Nanosheets</itunes:title>
      <itunes:season>1</itunes:season>
      <itunes:episode>4</itunes:episode>
      <itunes:episodeType>full</itunes:episodeType>
      <itunes:subtitle>Wrapping the gate all the way around to keep Moore's law breathing.</itunes:subtitle>
      <description><![CDATA[One idea drives twenty years of transistor architecture: keep the gate in control of the channel. We re-derive the short-channel effects — drain-induced barrier lowering and the ~60 mV/decade subthreshold floor — that broke planar MOSFETs, then trace the geometric fix: the FinFET's three-sided gate, gate-all-around nanosheets wrapping all four sides, and backside power delivery on today's 2 nm-class nodes. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Semiconductor Physics, MOSFETs, VLSI Design.]]></description>
      <itunes:summary><![CDATA[One idea drives twenty years of transistor architecture: keep the gate in control of the channel. We re-derive the short-channel effects — drain-induced barrier lowering and the ~60 mV/decade subthreshold floor — that broke planar MOSFETs, then trace the geometric fix: the FinFET's three-sided gate, gate-all-around nanosheets wrapping all four sides, and backside power delivery on today's 2 nm-class nodes. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Semiconductor Physics, MOSFETs, VLSI Design.]]></itunes:summary>
      <enclosure url="https://eerefresher.mirarver.com/Episode4.mp3?v=b470b4cf" length="9499181" type="audio/mpeg"/>
      <guid isPermaLink="false">eerefresher-s1e4</guid>
      <pubDate>Tue, 09 Jun 2026 14:00:00 -0700</pubDate>
      <itunes:duration>00:13:08</itunes:duration>
      <itunes:explicit>false</itunes:explicit>
      <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    </item>
    <item>
      <title>3. Field-Oriented Control of PMSMs</title>
      <itunes:title>Field-Oriented Control of PMSMs</itunes:title>
      <itunes:season>1</itunes:season>
      <itunes:episode>3</itunes:episode>
      <itunes:episodeType>full</itunes:episodeType>
      <itunes:subtitle>How to make a three-phase motor think it's a DC motor.</itunes:subtitle>
      <description><![CDATA[A DC motor is easy because flux and torque are decoupled; a three-phase machine is hostile in abc coordinates. Field-oriented control fixes the frame: the Clarke and Park transforms collapse the sinusoids to DC in a rotor-synchronous d-q frame, so two PI loops give independent torque and flux control. Then the modern layer — field weakening, maximum-torque-per-amp in interior PMSMs, and sensorless operation. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Electric Machines, Control Systems, Electric Vehicles, Embedded Systems.]]></description>
      <itunes:summary><![CDATA[A DC motor is easy because flux and torque are decoupled; a three-phase machine is hostile in abc coordinates. Field-oriented control fixes the frame: the Clarke and Park transforms collapse the sinusoids to DC in a rotor-synchronous d-q frame, so two PI loops give independent torque and flux control. Then the modern layer — field weakening, maximum-torque-per-amp in interior PMSMs, and sensorless operation. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Electric Machines, Control Systems, Electric Vehicles, Embedded Systems.]]></itunes:summary>
      <enclosure url="https://eerefresher.mirarver.com/Episode3.mp3?v=e09599c2" length="9945360" type="audio/mpeg"/>
      <guid isPermaLink="false">eerefresher-s1e3</guid>
      <pubDate>Tue, 02 Jun 2026 14:00:00 -0700</pubDate>
      <itunes:duration>00:13:46</itunes:duration>
      <itunes:explicit>false</itunes:explicit>
      <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    </item>
    <item>
      <title>2. OFDM, the Cyclic Prefix &amp; 5G Numerology</title>
      <itunes:title>OFDM, the Cyclic Prefix &amp; 5G Numerology</itunes:title>
      <itunes:season>1</itunes:season>
      <itunes:episode>2</itunes:episode>
      <itunes:episodeType>full</itunes:episodeType>
      <itunes:subtitle>How to make a brutal channel behave like a spreadsheet.</itunes:subtitle>
      <description><![CDATA[Multipath makes a wideband channel painful — intersymbol interference and frequency-selective fading. OFDM splits the band into orthogonal subcarriers built by the IFFT and FFT, and the cyclic prefix does two jobs: a guard interval against delay spread, and turning linear convolution into circular so the channel goes diagonal and equalization becomes one division per subcarrier. Then 5G NR makes the waveform scalable with numerology. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Signals & Systems, Digital Signal Processing, Communication Systems, IoT & Wireless.]]></description>
      <itunes:summary><![CDATA[Multipath makes a wideband channel painful — intersymbol interference and frequency-selective fading. OFDM splits the band into orthogonal subcarriers built by the IFFT and FFT, and the cyclic prefix does two jobs: a guard interval against delay spread, and turning linear convolution into circular so the channel goes diagonal and equalization becomes one division per subcarrier. Then 5G NR makes the waveform scalable with numerology. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Signals & Systems, Digital Signal Processing, Communication Systems, IoT & Wireless.]]></itunes:summary>
      <enclosure url="https://eerefresher.mirarver.com/Episode2.mp3?v=d071c2e6" length="9561254" type="audio/mpeg"/>
      <guid isPermaLink="false">eerefresher-s1e2</guid>
      <pubDate>Tue, 26 May 2026 14:00:00 -0700</pubDate>
      <itunes:duration>00:13:17</itunes:duration>
      <itunes:explicit>false</itunes:explicit>
      <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    </item>
    <item>
      <title>1. Grid-Forming Inverters &amp; Virtual Synchronous Machines</title>
      <itunes:title>Grid-Forming Inverters &amp; Virtual Synchronous Machines</itunes:title>
      <itunes:season>1</itunes:season>
      <itunes:episode>1</itunes:episode>
      <itunes:episodeType>full</itunes:episodeType>
      <itunes:subtitle>Who holds the frequency when nothing is spinning?</itunes:subtitle>
      <description><![CDATA[We re-derive why grid frequency was always pinned to spinning mass — the swing equation, the inertia constant H, and droop — then face what inverter-based renewables did to it: falling system inertia and steeper rate-of-change-of-frequency. The fix is the distinction the field now turns on: grid-following vs. grid-forming inverters, and the virtual synchronous machine that implements the swing equation in firmware so a battery emulates rotor inertia. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Power Systems, Renewable Energy, Power Electronics.]]></description>
      <itunes:summary><![CDATA[We re-derive why grid frequency was always pinned to spinning mass — the swing equation, the inertia constant H, and droop — then face what inverter-based renewables did to it: falling system inertia and steeper rate-of-change-of-frequency. The fix is the distinction the field now turns on: grid-following vs. grid-forming inverters, and the virtual synchronous machine that implements the swing equation in firmware so a battery emulates rotor inertia. Warm up first in the CircuitQuEEst app (https://circuitquest.mirarver.com/) with these quests: Power Systems, Renewable Energy, Power Electronics.]]></itunes:summary>
      <enclosure url="https://eerefresher.mirarver.com/Episode1.mp3?v=c462406a" length="9784751" type="audio/mpeg"/>
      <guid isPermaLink="false">eerefresher-s1e1</guid>
      <pubDate>Tue, 19 May 2026 14:00:00 -0700</pubDate>
      <itunes:duration>00:13:34</itunes:duration>
      <itunes:explicit>false</itunes:explicit>
      <itunes:image href="https://eerefresher.mirarver.com/cover.jpg"/>
    </item>
  </channel>
</rss>
