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Amplifier Circuits:
Logarithmic Page 1
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Logarithmic Amplifiers: #-B
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Last Updated on:
Wednesday, June 02, 2021 01:44 PM |
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Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students &
inventors:
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Simple Algorithm Nulls DC Offsets In DS - 09/15/94 EDN Design Idea One problem associated with converting analog signals to
digital samples is ensuring that the zero level of an analog signal (minus its dc offset, if any)
converts to a digital sample of exactly zero. If the analog signal's zero … [by V Solovyov, Rossiya,
Russia]
Single Stage Gives Logarithmic Gain Step - 03-Mar-94 EDN Design Idea By placing a variable component in the positive feedback loop
of an op Amp; you can vary the gain of the stage logarithmically with respect to a linear resistance or
conductance.… [by Allen Windhorn, Reliance Electric, North Mankato, MN] |
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Software Calibrated, 1 MHz
to 8 GHz, 60 dB RF Power Measurement System Using the AD8318 Logarithmic Detector
- Software Calibrated, 1 MHz to 8 GHz, 60 dB RF Power Measurement
System Using the AD8318 Logarithmic Detector. A calibration is performed by applying two known signal
levels close to the endpoints of the AD8318 linear input range and measuring the corresponding output
codes from the ADC. This deviation is expressed in dB using the equation where CODE_OUT is the ADC output
code; SLOPE_ADC is the stored ADC slope in codes/dB; INTERCEPT is the stored intercept; and PIN_TRUE is
the exact (and unknown) input level.,The plots shown in Figure 3 through Figure 8 show the typical system
performance that can be obtained using the AD8318 and AD7887BR in an RF power measurement system. …
[Analog Devices-Circuits from the Lab]
Software snippet provides improved subset-sum algorithm - 09/25/03 EDN Design Idea The subset-sum problem is one of the most frequently occurring
NP (nondeterministic, polynomial-time]-complete] problems. It asks whether a subset of numbers in a set
of positive integers adds up exactly to a given value. A relaxed … [by Ivan Basov, Brandeis University,
Waltham, MA]
Transient Analysis -
One of the most complex and
intriguing capabilities of the SPICE algorithm is the Transient Analysis. How do we take a collection of
resistive and energy-storage components, then find its time response to an arbitrary input waveform? Yes,
you could formulate and solve the differential equations to get the response versus time, but SPICE is
not a differential equation solver (spice design) …
Using
the ADXL202/ADXL210 with the Parallax BASIC Stamp Module® to Speed Algorithm Development
- AN-596 Analog Devices App Note…
Versatile power-supply load uses light bulbs -
02/07/02 EDN Design Idea Improvising loads for bench-testing and designing power supplies is often a
frustrating and sometimes hazardous experience. When you push large power resistors to their limit, they
tend to burn benches and melt solder connections. M… [by William Sloot, Computron Display Systems, Mount
Prospect, IL]
Version 4 of a
DC Current Indicator
- The circuit below uses
some common components to turn on an LED whenever DC current above a certain level is detected. The
circuit uses a very popular LM393 dual voltage comparator from National Semiconductor and a common 1N4148
signal diode. The diode[ . . . Hobby Circuit designed by Dave Johnson P.E., 10/16/05]
White LED driver provides 64 step logarithmic dimming
- 10-Jun-04 EDN Design Idea The circuit of Figure 1 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 and adjusts the total LED cur… [by William Hadden, Maxim
Integrated Products, Sunnyvale, CA]
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Logarithmic Amplifiers:
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