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Reference Circuits,
Page 1
Reference: #'s - AB-CD-NO-RS - Z Last Updated on:
Monday, October 03, 2011 06:07 PM
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
1.2 Volt Reference - National Semiconductor Application Note
04-Nov-1995/ (app note added 3/03)
16-bit adjustable reference uses 8-bit digital potentiometers -
25-Dec-03 Issue of EDN It may be easy to find a precision voltage
reference for your application; however, a programmable precision reference is
another matter. The circuit in Figure 1 yields a precision reference with an LSB
of 62.5 µV. The circuit is a 16-bit DAC using three 8-bit digital potentiometers
and three CMOS op amps.... [Design Idea by Bonnie Baker, Tucson, AZ]
2 AA cells power step-down regulator - 01/07/99 Issue of EDN
DC/DC conversion is particularly challenging when both the input and output
voltages are low. Step-up ICs that operate with inputs lower than 1V are
available, but step-down ICs that accept input voltages....Page includes several
designs. Scroll to find this one.... [Design Idea by Len Sherman, Maxim
Integrated Products, Sunnyvale, CA]
AC line powers microcontroller-based fan-speed regulator - 9-Nov-06 Issue of EDN
Capacitor drops voltage, decreases waste heat in line-powered controllers.... [Design Idea
by Abel Raynus, Armatron International Inc, Malden, MA; Edited by Brad Thompson and Fran
Granville]
Active Clamp Forward Reference Design - This reference design is an active-clamp
forward converter that can deliver up to 24 A of continuous current at 5 V from an input
range of 35 V to 75 V. The active-clamp topology with self-driven secondary synchronous
MOSFETs allows….(added 3/05)
ADC's Reference Improves Rtd Measurements - 10/27/94 EDN-Design
Ideas....Temperature measurements using RTDs (resistance-temperature detectors]generally
employ bridge circuits with stable power supplies for signal conditioning. Unfortunately,
this scheme generally produces nonlinear outputs. A linear bridge configuration that uses
two identical current sources depends on accuracy of matching sources....
[Design Idea by Bharat Heavy Electricals Ltd, Tiruchirapalli, India]
Add an auxiliary voltage to a buck regulator - 31-Oct-02 Issue of EDN You
often needthan one regulated output voltage in a system. A frequently used and reasonably
simple way to create this auxiliary output voltage is to add a second winding to the
output inductor, creating a coupled inductor or a transformer, followed by a diode to
rectify (peak-detect] this output voltage.... [Design Idea by John Betten, Texas
Instruments, Dallas, TX]
