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Y2K Floating-Gate Workshop
Floating-Gate Devices: They are not just for Digital Memories Anymore Dr. Paul Hasler Georgia Institute of Technology ICE lab
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Workshop Topics Thursday: Floating-Gate Devices / Scaling
Friday: Floating-Gate Circuits, Epots Saturday: Programmable Filters, Translinear Circuits, Log-Domain Circuits Monday: Floating-Gate Signal Processing/ Learning
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Overview of Floating-Gate Devices
Information Storage Floating-Gate Transistor Modifying Floating-Gate Charge UV photo-injection Electron tunneling Hot-electron injection
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World of Floating-Gate Circuits
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E-Pots R. Harrison, A. Bragg, and P. Hasler More info
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Capacitor-Based Circuits
Resistor-Based Design Capacitor-Based Design Resistors and Inductors define the circuit dynamics Capacitors and Inductors define the circuit dynamics Capacitors are the natural elements on silicon ICs
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Fourier-Based Programmable Filters
Vin Bandpass Filters, Exp Spaced (Hard in DSP) W11 W12 W13 W14 W15 W1n W21 W22 W23 W24 W25 W2n Iout1 Iout2 Programmable Analog Filter C4 filters
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Programmable Analog DFT
1 10 10 Individua l Bandpa ss Output A-rms) Filter Outp ut -1 10 10 m Ampli er ( Filt tude o urier -1 10 10 -2 f Band of Fo itude pass F Fourier Filter Output ilter Ampl (V Output -2 10 -3 10 -rms ) -3 10 -4 10 10 10 1 10 2 10 3 10 4 10 5 Frequen cy (Hz)
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Single-Transistor pFET Synapses
Why Synapses? Two key operations: 1. Input x stored W 2. dW/dt = correlation of the f( input , a given error signal)
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Drain-Gate Dynamic Equation
W = 1 -hE[Vg Vd] - eW
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Signal Processing Chip Constraints
Uses an adaptive floating-gate algorithm for ICA
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Floating-Gate pFET Device
Three Classes of Applications 1. Analog or Digital Memory 2. Floating-Gate Circuits 3. Adaptive Circuits
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