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.
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.
Common-Base Bypassing and How It Affects CB Frequency Response
Dennis Feucht 7/8/2016 3 comments
The common-base (CB) BJT configuration is the second stage of cascode amplifiers. It is useful as a voltage translator to the high side of an amplifier with a large voltage range. This article addresses the question of how the RB, CB combination at the base node affects the frequency response.
Book Review: Linear Circuit Transfer Functions
Dennis Feucht 6/21/2016 Post a comment
Circuits can often be compartmentalized into stages with only one or two reactances in each stage. These circuits can be formidable to analyze for engineers unaccustomed to using much math, yet Basso’s book presents higher-level circuit theorems or methods that reduce their apparent complexity.
Simple μ C-Based A/D Converters, Part 2: Σ -Δ
Dennis Feucht 6/14/2016 Post a comment
Microcontrollers (μCs) often contain a comparator that can implement a precise analog-to-digital (A/D) converter (ADC) with the addition of only an external resistor and capacitor. It is a charge-balancing or Σ- Δ
Simple μC-Based A/D Converters, Part 1
Dennis Feucht 6/3/2016 1 comment
One useful dynamic application of μCs is as analog-to-digital converters (ADCs). ADCs over the years have gone from complete DVMs as instruments to embedded subsystems, to a few components. This two-part article presents some minimalist techniques for implementing μC-based ADCs.
The Bootstrapped Astable Multivibrator
Dennis Feucht 5/17/2016 12 comments
Some time ago, I reverse-engineered a low-cost inverter made by Vector Mfg. (now Black & Decker). It uses a classic 2-BJT astable multivibrator (AMV) but with a circuit design twist, as shown below. What is the purpose of R6?
Diff-Amp Uses a Resistor Network
Dennis Feucht 4/14/2016 3 comments
Low-cost integrated resistor networks can be used to implement a low-parts-count two-op-amp differential amplifier with low common-mode gain. Integrated onto a common substrate and processed together, resistors of integrated networks match well and are an alternative solution to discrete resistors, especially for amplifiers with a wide common-mode input voltage range.
The Benson High-School Electronics Class Rose Festival Prank
Dennis Feucht 4/6/2016 Post a comment
Every year, a big festival is held in Portland, Oregon - the Silicon Forest - that is not quite as famous as the Pasadena Rose Parade, though its parade was carried on network television in the 1960s, when I was in high-school. In the mid-‘60s, Benson Polytechnic High School was rated nationally as number two behind the Bronx School of Science in New York
Recently, an amateur astronomer, Scott Tilley in Roberts Creek, British Columbia, amazingly found NASA’s IMAGE spacecraft more than 12 years after it went dark.
Electronics technology is contributing heavily to the automotive industry with ICs for the DC-DC conversion utilized in the creation of voltages suitable for the central processor to enable actuators and to process the signals coming from the electronic sensors.
The additional connection between numbers and the physical world is achieved through the use of units
Antennas have come a very long way from the classic metal-element versions; are you ready for their next phases?