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TUTORIALS
Abstract: Most analog integrated circuits (IC’s) require biasing currents and voltages that are power supply independent, temperature controlled and insensitive to manufacturing process variations. To that end, the VCR (Voltage and Current Reference) macro cell described herein, provides basic circuits that establish a foundation for achieving these requirements.
Abstract: In custom analog integrated circuit (IC) designs, there are many occasions where a general purpose Voltage Feedback Operational Amplifier (VF-OpAmp) is useful. If the application calls for differential inputs, high input impedance, low output impedance, common mode isolation and current drive capability, the VF-OpAmp presented herein provides a basic topology for achieving these requirements.
Abstract: The primary advantage of “current feedback” operational amplifiers (CF-OpAmps), over other types of OpAmps, is their ability to achieve fast slew rates at small quiescent power levels. This is especially advantageous for pulse applications where most of the power is required during the pulse edges. The way CF-OpAmps achieve fast slew rates at small quiescent power levels is by generating the internal currents, required for fast slew rates, dynamically through the negative input terminal.
Abstract: The primary advantage of "rail to rail" operational amplifiers (RR-OpAmps) over other types of OpAmps is their ability to swing the output voltage close to the power supply rails. This is achieved by using transistor collectors for the output. This is especially advantageous for small voltage supplies (e.g. 3 volts) where to operating range is limited.
Abstract: In custom analog integrated circuit (IC) designs, there are many occasions where a general purpose Four Quadrant Multiplier Amplifier (4Q-Mult) is useful. If the application calls for the multiplication /division of two independent signals, squaring of a single signal, absolute value, square root1, the 4Q-Mult presented herein provides a basic topology for achieving these requirements.
Abstract: The primary advantage of comparators is their ability to switch states with small differences in input voltages. This is achieved by using high gain, not necessarily stable, amplifiers with hysteresis, and output voltage clamping.
Abstract: This document provides a brief introduction to the use and syntax for TE_SPICE3. It is intended to get the user started with the simulator armed with the basic skills to perform more complicated and realistic simulations. Copyright 2002-2007 Turgeon Engineering, Inc. Site last updated June 28,
2007 |
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