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Reference Circuits,
Page 4
Reference: #'s - A
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Last Updated on:
Thursday, November 30, 2017 04:30 PM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Obtain higher voltage from a buck regulator - 29-May-03 Issue of EDN
Several semiconductor vendors'current-mode buck controllers have input-voltage
ranges of 30 to 36V but have output-voltage ranges from the reference voltage to
approximately 6V.... [Design Idea by Ajmal Godil, Micrel Semiconductor, San
Diego, CA] |
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Positive regulator makes dual negative output converter - 26-Jun-03
Issue of EDN Some systems, such as optical networks, requirethan one
negative voltage. A common procedure is to boost the main negative supply of -5V
to -10V and then reduce it with a linear regulator to -9V. The -5V itself comes
from a positive supply, typically 5 or 12V... [Design Idea by Keith Szolusha,
Linear Technology Corp, Milpitas, CA] |
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Positive regulator makes negative dc/dc converter - 26-Dec-02 Issue of
EDN Power-supply designers can choose from a plethora of available
positive buck regulators that can also serve as negative boost dc/dc converters.
Some buck regulators have a negative-feedback reference voltage expressly for
this purpose, but ICs that have positive-reference feedback... [Design Idea by
Keith Szolusha, Linear Technology Corp, Milpitas, CA] |
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Potentiometer Programs & Stabilizes Voltage Reference - 05/30/02 EDN-Design
Ideas....The potentiometer portion of a mixed-signal, digitally programmable potentiometer
adds variability to an analog circuit, and its digital controls provide programmability.
You can use a digital potentiometer in two ways in an analog circuit. You can use it as a
two-terminal variable resistance, or rheostat, or as a three-terminal resistive
divider.... EDN is migrating links. This link is not verified. Search the "title"
EDN for new link. |
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[_OLD-ads-dont_upload/OLD I-ADS from web/ad-djandassoc.htm] |
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Power over Ethernet: Sync Flyback Reference Design - This reference design
presents an alternative to the typical boost power regulator. A buck converter IC is used
to generate a higher voltage needed by the white light LED power from a Ni-Cd battery.
This circuit operates by turning the high switch on, connecting the battery voltage across
the inductor....(added 3/05) |
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Precision reference bans precision resistors - 06/10/99 EDN-Design
Ideas....Combining a switched-capacitor charge pump with a precision reference yields an
inverted reference from a positive power supply.... [Design Idea by Budge Ing, Maxim
Integrated Products, Sunnyvale, CA] |
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Precision Reference uses Only Ten Microamperes - National Semiconductor
Application Note (app note added 2/06) |
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Precision voltage reference delivers 80 mA - 1-Dec-06 Issue of EDN Robust,
4.096V reference source packs a punch.... [Design Idea by James Horste and Gary Staiman,
Maxim Integrated Products Inc, Sunnyvale, CA; Edited by Brad Thompson and Fran Granville] |
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RD68HC908LBC : Li-ION Battery Charger Reference Design - This reference design
describes a Li-ion battery charger for one 3.6V Li-ion battery cell by using the low cost
8-pin MC68HC908QT2 MCU. This reference demo provides reader a reference on how to
implement constant current, constant voltage charging method for Li-ion battery and how to
in-circuit-programming M68HC908QT/QY MCU in system (app note added 3/05)
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Rearranged reference helps ADC measure its own supply voltage - 28-Apr-05 Issue
of EDN Clever topology allows self-measurement of power supply rail.... [Design Idea
by Björn Starmark and Orville Buenaventura, Maxim Integrated Products Inc, Sunnyvale, CA,
and Sören Käck, Audioväxlar, Sweden; Edited by Brad Thompson] |
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Reduce voltage reference output noise by half - 3-Feb-05 Issue of EDN
Reducing low-frequency (1/f] noise generated by an IC voltage reference can prove
difficult. In theory, adding a lowpass filter to a reference's output reduces noise. In
practice, a lowpass RC filter for suppression of noise frequencies below 10 Hz requires
large values of series resistance and shunt capacitance.... [Design Idea by Alfredo H Saab
and Steve Logan, Maxim Integrated Products Inc, Sunnyvale, CA] |
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Reference Design for the TAS5110DAD Digital Audio PWM Power Output Stage - The
true digital audio amplifiers (TDAA) system consists of a PCM–PWM modulator device and a
PWM power output device. The PCM–PWM processor accepts a serial PCM digital audio stream
and converts it to a 3.3-V PWM audio stream. The TDAA output stage provides a large-signal
PWM output. The digital PWM signal....(added 3/05) |
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Reference stabilizes exponential current - 25-Oct-01 Issue of EDN In an
antilog converter, the difference between the base voltages of two transistors sets the
ratio of their collector currents The use of matched transistors balances the
first-order temperature coefficient but leaves a temperature-dependent gain term, q/kT.
Classic antilog circuits use a thermistor in the drive circuitry to correct this
temperature dependency.... [Design Idea by Tom Napier, North Wales, PA] |
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References for A/D Converters - National Semiconductor Application Note
04-Nov-1995 / (app note added 8/03) |
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Regulator has One Active Part - 03/16/95 EDN-Design Ideas EDN is migrating
links. This link is not verified. Search the "title" + EDN for new link.
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Regulator Makes Dual Tracking Reference - 11/07/96 EDN-Design Ideas....You can
use the venerable 723 voltage regulator in new and unusual ways. For example, you can
modify its topology as in Figure 1 to yield a low-component-count, dual-polarity tracking
voltage reference. The 723, a long-time standard in power-supply design, is a flexible IC
that includes a temperature-compensated voltage reference, an error amplifier,.... [Design
Idea by James Mears, National Semiconductor, Tacoma, WA] |
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Reference: #'s - A
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