AC to AC Converters
(AC to AC Power Supplies and Transformer Circuits)
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Last Updated on:
Friday, October 03, 2014 10:36 AM

Circuits Designed
by Dave Johnson, P.E. : 

ISOLATED AC CURRENT MONITOR
This circuit uses a small AC current transformer from Magnetek to produce an
isolated voltage proportional to the AC current in the
primary winding. The transformer contains a single turn primary with a low
0.001ohm resistance. It can easily handle 30 amps of AC current and provides
at least 500vac of isolation. With the components shown, the output AC voltage
is scaled so 1 amp of current produces 100mv of AC voltage.


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:


AC Couple Analog Signals without a DC Bias Source  02/03/00 EDNDesign
Ideas A conventional accoupling circuit in a singlesupply system comprises
a series capacitor and a shunt resistor to ground. Unfortunately, negative
peaks of input signal can exceed 0.3V input operatingrange limits of an
ADC, such as LTC1402 serial 12bit sampling ADC. To avoid going below
ground, circuit must return shunt input.... [Design Idea by Joseph
Luis Sousa, Linear Technology Corp, North Chelmsford, MA] 

Additional RFI Protection for Line Input Circuits  AS072 Jenson
Transformer Application Note (app note 5/02) 
Algorithm Tests for Point Location  08/03/00 EDNDesign Ideas A
recent software project approximated the phasespace trajectory (also known as a
strange attractor) of a certain dynamic system by using several nonoverlapping
triangles. It became necessary to determine whether particular operating points
were on or off that attractor. Determining whether a circle or a rectangle
contains a point is trivial.... [Design Idea by Lawrence Arendt, Manitoba HVDC
Research Centre, Winnipeg, Canada] 
Algorithm Transforms Filter Coefficients  01/21/99 EDNDesign Ideas
To synsize infiniteimpulseresponse (IIR]filter functions, expressed as H(z],
you commonly use analog prototypefilter functions, expressed as H(s], using
bilinearz transform. This operation entails some algebraic complexity in
calculating filter coefficients. The simple algorithm shown here transforms
prototypefilter coefficients (W0, W1, W2]to IIR digitalfilter coefficients
(U0, U1, U2]. These coefficients transform from.... [Design Idea by Frank Vitaljic,
Bellingham, WA] 
Alway On Signal Sensing Subwoofer Mute Circuit  AS101 Jenson
Transformer Application Note (app note 6/07) 
An Acoustic Transformer Powered SuperHigh Isolation Amplifier 
National Semiconductor Application Note (app note added 6/06) 
AN134 AES & SPDIF Recommended Transformers  (app note added 6/07)

AN285: An Acoustic Transformer Powered SuperHigh Isolation Amplifier 
National Semiconductor Application Note (app note added 6/06) 
AntiRIAA Equalizer for Line to Mag Phono Converter  AS071 Jenson
Transformer Application Note (app note 6/07) 



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