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Modern Analog/ Integrated Circuit Filters

Modern Analog/ Integrated Circuit Filters . Analysis & Design. An Overview. Where Filters are used? Chronological evolution – techniques Integrated Circuits Support Other kinds of Filters Contents of the lecture note pack. Where Filters are Used?. Electrical/Electronic Communication

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Modern Analog/ Integrated Circuit Filters

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  1. Modern Analog/ Integrated Circuit Filters Analysis & Design

  2. An Overview • Where Filters are used? • Chronological evolution – techniques • Integrated Circuits Support • Other kinds of Filters • Contents of the lecture note pack

  3. Where Filters are Used? • Electrical/Electronic Communication • Defence • Entertainment • Medical • Aerospace Electronics

  4. Chronological Evolution(Techniques & IC Support-I) • Channel bank filters in FDM telephony (1915-), L,C,R elements. Frequencies to 4kHz • Silicon IC, OP-AMP, Inductor-less Filters (1960-), Hybrid Thin and Thick Film Technology- active RC Filters used extensively in PCM co-decs • MOS IC technology, Transistors Switches, Switched Capacitor Filters (1970-)- Monolithic IC Filters (low-frequency)

  5. Chronological Evolution(Techniques & IC Support-II) • Switched Current Filters (all digital CMOS technology) • Other Active Devices- OTA (1980-..), CC (1990-..). Frequency range ~ tens of MHz • Low Voltage, Low Power IC Filters – Current Mode Filters • A Mobile Communication Filter (at the intermediate frequency of 100 MHz- GSM system)

  6. Mobile Communication Filter Example

  7. Chronological Evolution(Techniques & IC Support-III) • Sub-micron IC technology, monolithic inductors . Frequency range ~GHz (Optical Communication Rx) • IC Filters and VLSI system • Example IC chip

  8. Other Kinds of Filters(not a part of this course) • Mechanical Filters • Charge Transfer Device Filter • Crystal Filters • Surface Acoustic Wave Filters • Digital Filters

  9. Contents of the Lectures • Review of Network Theory - Ch.2 • Synthesis of Filter functions (Magnitude and Phase Approximations) - Ch.3 • Second Order Active Filters (OA,OTA and CC based) – Ch.5 • Second Order Switched-Capacitor Filters – Ch.6 • All-pole L,C ladder filters Realization – Ch.4 • High Order Filter Realization Techniques – Ch.7 • Integrated Circuit Filters – Ch.9 • Current-Mode Filters – Ch.8

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