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DSP Algorithm Measures Frequency & Damping - 10/08/98 EDN-Design Ideas: The
time-domain DSP algorithm described here allows you to measure the key
parameters—natural frequency and damping—in linear, second-order electromechanical
systems. The method applies to a range of electromechanical transducers
(electromagnetic or electrostatic).....(design idea added 2/06)
Linear Potentiometer implements Logarithmic Gain Control - 10/23/97 EDN-Design
Ideas: -Trimmer potentiometers are ubiquitous components and are available in a
variety of packages, Resolutions, and temperature stabilities but none of these
potentiometers implements anything but the usual linear function of resistance vs.
shaft position as useful in many audio applications.....(design idea added 6/06)
Log Amp uses Capacitor Charging Law - 01/10/02 EDN-Design Ideas: The novel
logarithmic amplifier in Figure 1 relies on the exponential charging characteristics
of a simple RC circuit. The expression for the time, T, required for a capacitor, C,
to reach a voltage (VIN-VK)from 0V, when charged through a resistor.....(design idea
added 06/03)