Innovatia

Innovative Designs and Design Know-How

Innovatia Books and Technical Reports

Instrumentation & Analog Electronics	Pulsed-Power Electronics	Motor-Drives & Motion Control
Power Conversion	Rocketry	Innovatia

Instrumentation and Analog Electronics

Analog Circuit Design   

Analog Circuit Design will be available in early 2009 in print. At that time the PDF version will be discontinued.

A revised and expanded multi-volume PDF edition e-book of the Handbook of Analog Circuit Design by Dennis Feucht, published originally by Academic Press, and now streamlined as a four-volume set. Individual PDF volumes are available via email. 

Amplifier Circuits

Presents the basic principles of transistor circuit analysis, basic per-stage building blocks, and feedback. Presentation is restricted to quasi-static (low-frequency) considerations, to emphasize basic topological principles. Prepares the reader to analyze and design multi-stage amplifiers with feedback, including calculation and specification of gain, input and output resistances, including the effects of transistor output resistance, r_o. 223 pages.

Dynamic Circuit Response

Presents transient and frequency response analysis methods, with emphasis upon complex-frequency techniques; dynamic design methods for compensation of amplifier response, and impedance transformations of active devices above their bandwidths, an important but little-known topic. Prepares the reader to perform frequency-dependent analysis and design, including high-frequency effects on input and output impedances and response compensation. 216 pages.

High-Performance Amplifiers

Applying the concepts developed in the previous two volumes, this advanced treatment of amplifier design/analysis emphasizes both wideband and precision amplification. Topics include bandwidth extension, noise and distortion, effects of components, instrumentation and isolation amplifiers, autocalibration, thermal effects, current-feedback amplifiers, multi-path schemes, feedforward, f_T multipliers, buffers, voltage translators, Gilbert gain cells and multipliers. 310 pages.

Signal-Processing Circuits

Presents a variety of analog non-amplifier circuits, including voltage references, current sources, filters, hysteresis switches and oscilloscope trigger and sweep circuitry, function generation, absolute-value circuits, and peak detectors. Digitizing (ADCs and DACs) and sampling (including some switched-capacitor) circuits are explained, with theory required for design. Sampling theory is developed from both a frequency and time-domain viewpoint, with emphasis upon application to design. 224 pages.

Isolation Amplifier 

Linear optocouplers and novel op-amp feedback circuits are used in this low-distortion, dual-channel (stereo), 150 kHz isolation amplifier design. This booklet covers design principles, including detailed design equations, board layout, and examples.

Pulsed-Power Electronics

Pulse Amplifiers

Power pulse amplifiers deliver accurate current or voltage pulses for pyrotechnic devices and capacitance-discharge applications. Besides articles on power pulse generator design principles, two pulse amplifier designs are covered in detail, with MathCAD design programs, designware files and boards.

Chargers

Switching converters that charge batteries or capacitor banks offer unusual design challenges. Two design case studies are covered in detail in separate reports: a low-power (5 W) flyback capacitance-bank charger and a high-power (750 W) half-bridge C-bank charger that uses a novel Innovatia zero-power-switching circuit topology. Included are application design notes and MathCAD design programs. Prototype hardware and designware files are also available.

Ultrasonic Imager Technology

	Single-board computer-based subsystem
	Sharp image from A (1-D) or B (2-D polar) scans
	Novel bidirectional scan synchronization and probe position detection
	Digitized output drives polar-to-raster scan converter
	For more information on licensing or buying this design, Inquire.

PG1 Pyrotechnic Pulse Generator

Motor-Drives

Sensorless PMS Motor-Drives

Field-oriented step-motor control eliminates the resonances and loss of dynamic control due to open-loop microstepping of step-motors. The motor instead behaves like a dc brush motor, even when changing speed. Instead of pulsing the rotor from one equilibrium position (step) to the next, field-oriented or vector  control continually maintains correct drive phase at all rotor positions to produce constant, maximum torque.

Vector-summed precision phase control  is a novel application of leading-edge motor theory that has led to a breakthrough in accurate six-step PMS motor control for cost-sensitive applications. This tech report describes in detail how step advancement is achieved by sensing motor phase directly, from its induced terminal voltages, and combining winding voltages vectorially to produce waveforms that correctly commutate the motor at their zero-crossings. The result is more and smoother torque and requires few parts to implement.

Dynamometer Design 

Benchtop dynos for motor characterization are specialized and costly instruments, limiting their availability. This report describes how to construct a dyno from low-cost components. The approach uses either a brush or PMS motor as the active load, as a generator. Once characterized, this generator also functions as a torque and speed sensor. Included in the e-booklet are the detailed mechanical drawings of dyno prototype constructed using this approach. 90 pages.

Gear-Motor Controllers

The design of electrical actuators/controllers for gear-motors, used to actuate high-torque, low-speed mechanical devices such as quarter-turn ball and multi-turn valves, or solar trackers, is explained in this e-booklet, based on two designs: an optically-sensed, single-direction controller, and the VC1, which uses Hall-effect devices and adjustable-position magnets to set opened and closed positions or limits. Articles explain the detailed designs, give test waveforms, and describe applications problems and faults to avoid. Designware includes a PC parallel-port interface program, PAL/GAL programs, gear-motor and magnet component information, ball-valve load characteristics, and commercial valve info.

	Quarter-turn ball-valve or multi-turn valve fluidic control
	Position control of low-speed, high-torque mechanics
	Computer interface or manual control
	Single board prototype hardware mounts on Grainger line of gear motors

Power Conversion

Magnetics Design

Design your own magnetics for switching converters!

This suite of MathCAD programs comes with explanations and background theory. Fill in numbers for the highlighted quantities, select core and wire types, and iterate until the design is optimized to your satisfaction. The program maximizes primary-to-secondary-winding power transfer and calculates primary and secondary winding-window areas to maintain uniform winding loss in the window. 360 kbytes compressed.

Rocketry

Fundamentals of Rocketry

This e-book covers the basic theory of flight dynamics, propulsion, structural design, rocket electronics, mission planning, and more. It develops the basic formulas of flight, rocket engine design, instrumentation and control, assuming only a knowledge of high-school mathematics. The basic principles of flight mechanics, structural mechanics, and thermodynamics are presented. This book equips the reader to engage in rocket activity at an amateur or low-end commercial level, and in design and development of liquid-propellant launch vehicles and missions. Hundreds of illustrations and equations; 4.5 megabytes; 3.7 Mbytes compressed.

For rocket components, see:

Quarter-Turn Valve Controller

Huron Single-Board Data Acquisition and Control

Innovatia

© Innovatia, 2007. All rights reserved. JUL07 Version