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Content by D Feucht
D Feucht
Member Since: April 23, 2013
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Blog Posts: 145
Posts: 308

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Comment: Rocket DASs - D Feucht - 11/5/2018
Data Acquisition and Instrumentation: Data Processing and Calibration
Dennis Feucht  
10/15/2018   Post a comment
Previously we looked at the electronics and sensors involved in data acquisition systems (DASs). Now we look at what to do with the raw ADC data once it is acquired.
Data Acquisition and Instrumentation: The DAS and Sensors
Dennis Feucht  
10/4/2018   Post a comment
This is a tutorial presentation of principles of instrumentation that is typically multi-channel, medium to high resolution (12 to 20 bits) and relatively slow - slower than oscilloscopes in sample rate
Comment: EMP Plan B - D Feucht - 10/1/2018
Comment: Timely Topic - D Feucht - 9/17/2018
Magnetics Design Chat, Part 3: Ripple Factor and Matching Magnetics to Circuit
Dennis Feucht  
9/15/2018   Post a comment
Continuing the chat from last time, we turn now to a circuit-related topic, that of current waveforms. The typical converter input waveform is shown with a static (dc) component and a ripple (ac) component
Fully-Differential Amplifiers and the Leading Edge in Electronics
Dennis Feucht  
9/7/2018   2 comments
Semiconductor companies have now had fully-differential amplifiers in their product lines for a few years, though these amplifiers have been in leading-edge electronics for decades. These diff-amps are differential not only at their input but also at their output, doubling output range.
Magnetics Design Chat: Part 2, Maximum Transfer Power Through Magnetics Components
Dennis Feucht  
8/15/2018   Post a comment
The basic limitations on magnetic cores
Magnetics Design Chat: Part 1, Optimal Design of Magnetics Components
Dennis Feucht  
8/6/2018   Post a comment
One of the seemingly most difficult aspects of power electronics is how to design power inductors and transformers.
Seemingly Simple Circuits: Transresistance Amplifier, Part 2--Transimpedance Amplifier Dynamics
Dennis Feucht  
7/9/2018   2 comments
In Part 1, the op-amp was approximated from a single-pole, finite gain amplifier to an infinite-gain, single-pole op-amp, and the gain of the transresistance amplifier circuit, shown repeated below, was derived. In this Part 2 we look at the consequences.
Stairstep Generator
Dennis Feucht  
7/2/2018   1 comment
This is a throw-together project using junk box parts that can be useful whenever an interesting-looking waveform is needed for a demonstration or for the beginnings of a video test generator or curve tracer.
Seemingly Simple Circuits: Transresistance Amplifier, Part 1-- Approximating Op-Amps
Dennis Feucht  
6/16/2018   1 comment
A seemingly simple circuit with only two components, an op-amp and a feedback resistor, is commonly used to convert a current to a voltage. This circuit is familiar as a photodetector or impedance-meter current-sense amplifier.
Oscilloscope Trigger Generators: Precision Synchronizers
Dennis Feucht  
6/10/2018   Post a comment
Oscilloscope triggering circuits can be adapted to other applications, as precision synchronizers.
Lead the Field in Electronics
Dennis Feucht  
5/16/2018   Post a comment
Hard copy electronic catalogs: Be bold, go old, and succeed
Buffer Amplifier Design
Dennis Feucht  
5/7/2018   Post a comment
Comment: Re: NASA TESS - D Feucht - 4/27/2018
Comment: Re: So which is it? - D Feucht - 4/12/2018
Mixed-Signal Circuits, Part 2: ADC and DAC Dynamics, the w-Domain, and Feedback Loop Design
Dennis Feucht  
3/19/2018   Post a comment
In this part, we push forth to transfer functions in s and z of ADCs and DACs, then consider briefly how to design feedback loops that span the analog-digital boundary.
Mixed-Signal Circuits, Part 1: From s to z - The Discrete Complex-Frequency Domain
Dennis Feucht  
3/11/2018   Post a comment
This article series is a mini-tutorial on the discrete complex-frequency domain and its complex variable denoted as z
Comment: Plasma, not Vacuum - D Feucht - 2/17/2018
Comment: Whither Technology? - D Feucht - 2/17/2018
Units, Pseudo-Units, Scaling Factors, and Units Conversion
Dennis Feucht  
2/16/2018   2 comments
The additional connection between numbers and the physical world is achieved through the use of units
High-Efficiency Analog Amplifiers, Part 3: Optimal Parallel-Segmented Voltages
Dennis Feucht  
2/5/2018   Post a comment
Optimal parallel-segment amplifier voltages are derived so that for either resistive or constant-current loads, the power dissipation in the parallel transistors is the same.
Comment: Re: Muntz TVs - D Feucht - 1/15/2018
High-Efficiency Analog Amplifiers, Part 2: Series and Parallel Segmented Amplifiers
Dennis Feucht  
1/6/2018   3 comments
Segmented amplifiers are analog amplifiers that switch on different transistors over the input-waveform voltage range, thereby limiting the voltages across them and hence their power dissipation.
High-Efficiency Analog Amplifiers, Part 1: The Efficiency-Linearity Tradeoff
Dennis Feucht  
1/2/2018   Post a comment
Switching amplifiers, like switching power supplies, are more efficient than linear or analog amplifiers. However, the analog amplifier is not obsolete just yet; new circuit ideas improve its efficiency to be comparable to switching amplifiers. This article presents some of those ideas
Case Study: Medical Laser System; Part 4: Laser System Design
Dennis Feucht  
12/13/2017   Post a comment
In this fourth part, the design of the whole laser loop is completed, beginning with the dynamics
Case Study: Medical Laser System; Part 3: Laser Loop Dynamic Design
Dennis Feucht  
12/2/2017   Post a comment
In this third part, the goal is to design the dynamic compensation of a NdYAG laser power control loop to achieve stability within the static error (accuracy) requirements.
Comment: Re: Laser feedback.... - D Feucht - 11/27/2017
Engineering Home-Schooling
Dennis Feucht  
11/27/2017   2 comments
Is the ordinary college education the best route to become an engineer?
Case Study: Medical Laser System; Part 2: Photodiode Amplifier
Dennis Feucht  
11/13/2017   2 comments
The redesign goal was to make the original PDA design less noisy, simpler, less costly, and extended at the low end of the linear dynamic range to zero volts.
Case Study: Medical Laser System; Part 1: Stabilizing a Laser Feedback Control Loop
Dennis Feucht  
11/6/2017   2 comments
A medical laser company was having some technical problems with their NdYAG (neodymium yttrium aluminum garnet) laser development.
Alternative Uses of Packaging in Electronics
Dennis Feucht  
10/3/2017   Post a comment
In an era of collapsing economies, waning affluence, and too much garbage amid scarcity, a characteristic that is part of the engineering character - resourcefulness - is due to come back in vogue, as we are challenged to optimize the use of limited resources.
Comment: Techno-Sports - D Feucht - 9/12/2017
The Shape of Electronics Expertise
Dennis Feucht  
9/11/2017   2 comments
As we progress in our acquisition of electronics skills, we occasionally reflect on the “shape” that our knowledge and skills are taking. This article is an overview of basic decisions that “sculpt” our know-how and some of the consequences of the shape of it.
Sams Photofacts: A Needed Service Today
Dennis Feucht  
9/1/2017   2 comments
From a half century ago comes a “book” - or, more like a manual - one of a large set that became an electronics institution for decades: the Sams Photofacts
Comment: Another reference - D Feucht - 8/15/2017
The Miller Effect, Part 4: The Inverse Miller-Effect Paradox
Dennis Feucht  
8/14/2017   Post a comment
There is a paradoxical “inverse Miller effect” that occurs in transistor amplifiers.
Comment: Simple But Profound - D Feucht - 8/7/2017
Comment: Re: Curious - D Feucht - 7/11/2017
The Miller Effect, Part 2: The Generalized Single-Stage Amplifier
Dennis Feucht  
7/10/2017   4 comments
In the undergraduate active-circuits course in electronics engineering, the analysis of circuits is simplified, as it must be for introductory presentation.
Comment: Alas Radio Shack - D Feucht - 6/12/2017
Potentiometer Loading
Dennis Feucht  
6/5/2017   7 comments
Comment: Creative Young Minds - D Feucht - 5/21/2017
Lead-Lag Pole-Zero Frequency Compensators, Part 2: Dual Passive and Active Compensators
Dennis Feucht  
5/6/2017   Post a comment
Part 2 continues with pole-zero compensators of feedback loops and presents some methods not usually found in textbooks
Comment: Thorium! - D Feucht - 4/2/2017
Complementary BJT Configuration
Dennis Feucht  
4/1/2017   4 comments
Comment: Re: another project! - D Feucht - 1/22/2017
Popular Electronics Magazines and Books - Where Are They?
Dennis Feucht  
12/10/2016   13 comments
In the 20th century there have been three main American publishers of popular electronics books and magazines. All were founded by individuals who published material that bridged the hobbyist-technician-engineer gap
Comment: Re: Bug - D Feucht - 11/18/2016
Comment: Re:
forskolin fuel
- D Feucht
- 11/17/2016
Comment: Re: Back in the 80s - D Feucht - 11/17/2016


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