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Determining Clamping Voltages for Pulse Currents - MicroNote 108 from
Microsem Provides a formula for calculatingthe clamping voltage for values of surge
current at lower values than the peak rating. Sample calculation depicts simplicity of
concept. (app note added 6/06) |
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Digital variable resistor compensates voltage regulator - 9-Jul-09 Issue of
EDN A look-up table compensates for temperature drift.... [Design Idea by Jason
Andrews, Maxim Integrated Products Inc, Dallas, TX] |
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Direct Current Ignition Reference Design - This manual describes a reference
design of a Digital Direct Current Ignition for Motorbike by using the MC68HC908JK3.
The Motorola MC68HC908JK3 is a member of the HC08 Family of microcontrollers (MCUs).
It is a 8-bit low cost general purpose MCU with 16-bit free run timer. The features of
the MC68HC908JK3 include input....(app note added 3/05) |
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Discrete Component Voltage Regulator - While integrated circuits have become
a staple of all modern circuit designs, it is still possible to build circuits without
IC’s and still achieve a high level of performance. The circuit in Figure 1 is a high
performance 5 volt voltage regulator built using discrete components that are readily
available.... [Radio Amateur Society of Norwich] |
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Discrete Low-drop Regulator - ….must register on this site.... [Published in
Elecktor July/August 2010] |
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Discrete low-drop voltage regulator - 5V, 1A max (Circuit design added
10/06) |
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Don't Be Fooled by Voltage Reference Long-Term Drift & Hysteresis - DN229
Design Notes (Linear Technology) (app note added 1/06) |
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Drawing Power from a PC Serial Port - This circuits derives fairly low
power, (mA at5V) from a RS-232 serial connection. (NOTE: ASCIII drawing) (added 5/02)
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Dual +/ 15 Volt Power Supply - suitable for powering OpAmp circuits
(added 5/02) |
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Dual 12V Power Supply - Circuit only, no discription is included…. [Tony van
Roon's circuit] |
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Dual output LDO 250mA/500mA evaluator with load simulator - TPS70151EVM-152
provides a convenient method for evaluating the performance of TPS701xx dual output
linear regulators. The EVM provides proven and demonstrated reference designs and test
modes to aid in evaluation. (added 3/05) |
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Dual Output Regulator uses Only One Inductor - DN100 Design Notes
(Linear Technology) (app note added 1/06) |
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Dual Polarity Amplifier has Digital Control - 09/12/96 EDN-Design
Ideas....The circuit in Figure 1 can amplify a signal either in an inverting or a
noninverting mode. When switch S1 is on and S2 is off, the circuit behaves as a
regular inverting amplifier. When S2 is on and S1 is off, the circuit feeds the signal
to the noninverting input of the op amp; thus, the circuit behaves as a noninverting
amplifier. If S1 and S2 are monolithic analog switches, you.... [Design Idea by Rick
Downs, Dallas Semiconductor Corp, Dallas, TX] |
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Dual Polarity Peak Detector operates from Single Supply - 05/12/94 EDN-Design
Ideas....The circuit inFig 1 can detect the peak of either positive or negative
inputs, yet it operates from a single supply. The circuit uses two unity-gain
amplifiers to monitor the input signal, one an inverting amplifier and the other a
noninverting amplifier. A typical application is driving a VU meter.... [Design Idea
by Chester Simpson, National Semiconductor, Santa Clara, CA] |
Dual Polarity Power Supply - This dual polarity power supply is easy to
build, requires few parts, and is adjustable from 0-15 volts. It is great for powering
op amp circuits, as well as other circuits that require a dual supply voltage.
….... |
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Dual Regulated Power Supply - In this circuit, the 7815 regulatates the
positive supply, and the 7915 regulates the negative supply. The transformer should
have a primary rating of 240/220 volts for europe, or 120 volts for North America.
….(electronic schematic added 08/08) |
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Dual Regulated Power Supply-PSU - In this circuit, the 7815 regulatates the
positive supply, and the 7915 regulates the negative supply. The transformer should
have a primary rating of 240/220 volts for europe, or 120 volts for North America. The
centre tapped secondary coil should be rated about 18 volts at 1 amp or
higher,allowing for losses in the regulator. An application for this type of circuit
would be for a small regulated bench power supply.... [Circuit by Andy Collison] |
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Dual Regulators Power Pentium® Processor or Upgrade CPU - DN122 Design
Notes (Linear Technology) (app note added 2/06) |
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Dual Tracking + 15V - (electronic schematic / circuit added 4/02)
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Dual-output nonisolated SMPS powers appliances - 7-Dec-04 Issue of EDN
Modern appliances offer a range of features that rely heavily on microcontrollers and
auxiliary circuits. Although conventional iron-core transformers can provide ac
line-isolated, low-voltage power for a microprocessor, coupling the processor's
control signals to line-side power switches requires yet another layer of electrical
isolation, such as optocouplers or pulse transformers.... [Design Idea by Fabio
Cacciotto, STMicroelectronics, Catania, Italy] |
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Dual-polarity supply provides ±12V from one IC - 29-Apr-04 Issue of EDN
Well-regulated, dual-polarity power supplies find wide use in disk-drive,
handheld-device, automotive, and notebook-computer applications. In these
applications, board space and allowable component heights are continually shrinking.
So, power-supply designers face the challenge of providing split rails with as few
parts as possible, thus saving board space and cost.... [Design Idea by Keith Szolusha,
Linear Technology Corp, Milpitas, CA] |
| Dual-voltage regulator meets USB-power needs -
19-Aug-04 Issue of EDN This Design Idea stems from the limited availability of IC
voltage regulators that can meet key USB-power specs, coupled with the need for
turn-on sequencing and rise-time control at each output. As always, for PC-related
designs, minimum cost is a primary motivation. USB specs require all loads to limit
inrush current to less than 100 mA plus 50 µC of charge when powered on.... [Design
Idea by Wayne Rewinkel, National Semiconductor, Phoenix, AZ] |
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Dynamo current and voltage regulator - Useful for lovers of older cars,
motorcycles and boats. [Manfred Mornhinweg] |
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Easy Power Supply - Electroinic circuit…. [from Harry Lythall's website] |
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Efficient 100W Isolated Power Supply Reference Design using UCC3580-1 - This
reference design is an active-clamp forward converter that can deliver up to 30 A of
continuous current at 3.3 V from an input range of 35 V to 72 V. The active-clamp
topology with self-driven secondary synchronous MOSFETs allows the device to achieve
high efficiencies. The design includes remote sense connections for point-of-load
regulation and is footprint compatible with Half Brick Modules. (added 3/05)
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Explanation & Experiment About Regulated DC Power Supply - many power supply
designs for different voltages, built from discrete components (added 5/02)
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Extend low-output-voltage switching regulator's input range - 4-Jan-07 Issue
of EDN Switching regulator improves efficiency and allows 36V input.... [Design
Idea by Hua (Walker] Bai, Linear Technology, Milpitas, CA; Edited by Brad Thompson and
Fran Granville] |
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Extend the input range of a low-dropout regulator - 17-Oct-02 Issue of EDN
Because of process limitations, all ICs have an input-voltage limitation. This
limitation can be cumbersome when you try to step down a high supply voltage to a
lower, regulated voltage using a dc/dc converter, such as a linear regulator. Adding a
FET to the input of a linear regulator creates a dc/dc converter with a wider
input-voltage range than the range of the regulator alone.... [Design Idea by Jeff
Falin, Texas Instruments, Dallas, TX] |
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Finesse Regulator Noise - System designers often find themselves battling
power supply hum, noise, transients, and various perturbations wreaking havoc with low
noise amplifiers, oscillators, and other sensitive devices. Many voltage regulators
have excessive levels of output noise including voltage spikes from switching circuits
and high flicker noise levels from unfiltered references....(electronic circuit added
7/03) |
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Fixed Voltage Power Supply - The fixed voltage power supply is useful in
applications where an adjustable output is not required. This supply is simple,
but very flexable as the voltage it outputs is dependant only on the regulator and
transformer you choose. The maximum output current is 1.5A.... [Aaron Cake] |
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Fixed Voltage Regulators - Use a voltage regulator to obtain a fixed voltage
supply (at <1.5 Amps) from a variable source…. [REUK - Renewable Energy UK website] |
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Floating Input Extends Regulator Capabilities - DN21 Design Notes
(Linear Technology) (app note added 2/06) |
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Flyback LDO Buck Sync. Buck Reference Design - Flyback, LDO, Buck and Sync
Buck with Vin 10 to 16 V. Multiple output voltages of -24 V, -5 V, 1.5 V, 3.3 V, 5 V,
12 V and 58 V. The total output power is 15 W. (added 3/05) |
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Flyback with V in 36-72 V & V out +/-135 V - Flyback with Vin 36-72 V and
Vout +/135 V. The output current is 0.15 A with 20.25 W of output power. (added 3/05)
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