Innovative Open-Source Electronics


Instruments & Analog Electronics Motion Control
Power Conversion


Project Engineering Advisor

About Innovatia



What Is Open-Access Technology?

Innovatia Designware Features




An 86-page soft-cover book on 

Circuit Dynamics: Design-Oriented Analysis

This short book presents in detail the theoretical foundation of dynamic transistor circuit analysis in the time and frequency domains. It supplements what is found in Transistor Amplifiers by beginning with the step by step development of the theory. It goes beyond engineering textbooks by presenting more realistic circuits as encountered in commercial  products. Once the derivations are worked out - and some of them are algebraically involved - they can be used as templates for circuit design. They also give insights into how the circuits behave, as the equations are interpreted in how they relate to the circuits. 

This book is intended to take some of the mystery out of what is often a difficult aspect of circuit analysis and design. It is for those seeking a better, clearer understanding of what is too extensive to put into active-circuits textbooks.

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A 466-page soft-cover book on 

Power Magnetics Design Optimization

The design of power magnetics components is mysteriously complicated to even many power-electronics engineers. This book is not a rehash of prior magnetics textbooks, but presents instead new perspectives on magnetics, new methods, and clarified theory. What is new in this book? The back cover explains.


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A 486-page soft-cover book on Transistor Amplifiers

Finally! A book that gives the details of engineering thinking for the design of some 2- to 6-transistor amplifier circuits. The circuits look simple at first, but as the design proceeds to deeper layers of complexity, the design considerations become more advanced. Yet all that is needed to follow these design walk-throughs is mostly algebra, a calculator, and an active mind. 

Furthermore, the book contains lesser-known circuit theorems and a much-neglected topic: amplifier behavior above bandwidth, where resistance becomes inductive and resonates with capacitance. Bandwidth estimation is also developed, based on open- and short-circuit time constants.

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A 216-page soft-cover book on Rocketry and Astrionics

This book combines coverage of rocket fundamentals with an emphasis on rocket electronics, or astrionics. Those working on astrionic systems can benefit from an understanding of the basic principles of rocketry, and this book provides a "jump-start" for those seeking to do electronics in an aerospace environment. 

This book is also for those mainly interested in learning the fundamentals of rocketry: flight mechanics, propulsion, liquid-propellant rocket structure and component design, instrumentation and control, ground support, and launch procedure. 

The book ends with a case study of a 21-foot (6.4 m) 1000 lbf thrust LOX-kerosene rocket, showing some of the details involved in a sounding-rocket project.

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Build a low-cost curve tracer, the TPA202

The TPA202 prototype (shown above) has been completed and meets specifications. Join the project by requesting a free copy of the manual showing how to build one, and measure transistor beta and other parameters. This is a simple non-microcontroller instrument with only one trimpot adjustment. It has an accuracy of 1 to 3 %, depending on your choice of op-amps. It has INPut and OUTput ports and a DVM that measures the voltages and currents at each port. Output-port voltage (VCE) is 35 V full-scale and the current (IB) range of both ports is 100nA fs to 100 mA fs.

The TPA202 is a good introduction to two-port analyzer (TPA) circuits and design considerations. It results in a quite useful bench measurement instrument. Request a free emailed instruction manual from which to build a prototype. Make a request if you want a circuit-board and you will be notified when they are available.

Build or Buy a Floating Differential Source:

An Instrument for testing amplifier common-mode rejection and high-side or floating circuitry


The Floating Differential Source (FDS) consists of two voltage sources and a current source. They can be configured in two modes, as shown above. The FDS is a single-board instrument, uses an Atmel AVR microcontroller, and has two custom magnetic transductors in its power supply. The supply is like that of other kinds of two-port analyzers, with multiple floating sources. The FDS has a built-in 4-digit (12500 count) DVM that is used to set output voltages from the common-mode (or grounded) and the floating sources. The FDS can also be controlled through its serial port. It has a typical common-mode rejection of 4 decades (80 dB). FDS construction cost is about $100 US.  A few limited-edition prototypes are available from Innovatia for $350 US.  Input power is 12 V dc, 1 A. Join the project to build your own FDS and request the free manual. Product suppliers (manufacturers, sellers): inquire about one-time open-source licensing of FDS engineering-level designware

Innovatia Seeks Manufacturers or Entrepreneurs Seeking Product Designs


Innovatia as a design laboratory is seeking suppliers who manufacture and sell electronics measurement instruments, power conversion, and motion control products. Innovatia offers concept-proven to manufacture-ready designs as designware. Development status is given on this website. Please inquire via email about any of the design projects or designware.




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