CB-2: Easy Logarithms for COP400:  National Semiconductor - Application Note   (added 2/06)

Characterizing Digitally Modulated Signals with Ccdf Curves:  Aligent Application Note  (added 2/06)

Composite Amplifier Improves Noise :  08/04/94 EDN-Design Ideas / (Electronic Schematic / circuit added 4/02)  Amplifying low-signal levels for signal processing often stretches a single op amp's abilities. A composite design can improve the input noise for detecting extremely small signals and can enhance output-drive ability. Both the op amp's noise terms and the thermal noise of the components limit the minimum noise in an op-amp-based design. Furthermore, amplifier noise figures are not at their minimum for low-impedance sources such as 50 Ohm. Using a transformer is a common technique to achieve matched input impedance for maximum power transfer. Fig 1 shows one example, which follows the transformer with a composite amplifier to achieve a lower input noise figure....  

CRC Algorithm for Mcrf45x Read/Write Device:  Microchip Application Note - Published 15-Mar-01   (added 2/06)

DSP Algorithm Measures Frequency and Damping :  10/08/98 EDN-Design Ideas  / (added 2/06)

Easy Logarithms for COP400:  National Semiconductor - Application Note   (added 2/06)

Efficient Algorithm Generates Random Signal:  12/05/96 EDN-Design Ideas / (added 2/06)

Fast Algorithm Computes Histograms:  10/28/99 EDN-Design Ideas / (added 2/06)

Fundamentals of Modal Testing:  Aligent Application Note  (added 2/06)

Fundamentals of Signal Analysis:  Aligent Application Note  (added 2/06)

Linear Potentiometer implements Logarithmic Gain Control:  10/23/97 EDN-Design Ideas / (Circuit / schematic design added 6/06)   -- 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

Log Amp uses Capacitor Charging Law:  01/10/02 EDN Design Ideas  /  (added 1/05)  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, R, with an applied voltage of VIN, is VIN-VK=VIN (1-e-T/RC), where VK is a fixed voltage. ...

Log Converters :  National Semiconductor Application Note 04-Nov-1995 (Electronic Schematic / circuit added 4/02)

Logarithmic Amplifier:  Logarithmic amplifier uses the log characteristic of PN (diode, transistor) to implement logarithmic function. The second transistor is used as reference and with the PTK resistor minimizes the dT/dV coefficient. / (Electronic Circuit diagram added 03/03)

White LED Driver provides 64 step logarithmic dimming:  06/10/04 EDN Design Ideas  /  (added 1/05)  The circuit in this Design Idea is designed for portable-power applications that require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as four white LEDs from a 3.3V source.