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DAC and op amp provide variable Control Voltage: 12/06/01 EDN Design Ideas / (added 1/05) Early DACs
contained standard R-2R ladder networks, and produced a negative output voltage. These early DACs, such as the MAX7837/7847 and the MAX523, require both positive and negative supply rails to
accommodate their negative output. With the transition to single-supply ICs, however, many modern DACs operate with a single supply rail and an inverted R-2R ladder network. ... |
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DC Adapter Power Supply: DC voltage "virtual earth" circuits (circuit / schematic added 2/03) |
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DC Performance Comparisons of CMOS vs Bipolar LDOs When Operating in Dropout (Vin = Nominal V out) Mode (list devices):
Microchip Application Note - Published 12-Nov-02 (added 2/06) |
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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 capture and output compare functions for real time control. (circuit design added 3/05) |
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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 and Hysteresis: DN229 - Design Notes (Linear Technology) (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: ASCII drawing) (Electronic circuit added 5/02) |
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Dual 12V Power Supply: (Circuit added 9/04) |
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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. (circuit design added 3/05) |
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Dual output nonisolated SMPS Powers appliances: 12/07/04 EDN Design Ideas / (added 1/05) 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. |
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Dual Output Regulator uses Only One Inductor: DN100 - Design Notes (Linear Technology) (added 1/06) |
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Dual Polarity Amplifier has Digital Control: 09/12/96 EDN-Design Ideas / (Electronic circuit design added 02/05) |
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Dual Polarity Peak Detector operates from Single Supply: 05/12/94 EDN-Design Ideas / (added 2/05) 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. The design takes advantage of a characteristic of the LMC662, IC1. Although the op amp’s data sheet warns
against pulling inputs below ground, the op amp can withstand negative inputs if you limit the input current. In this circuit, R1 limits input current to a very small amount. The op amp does
nothing uncivilized, such as latching up or slamming against both rails, in this mode. It just waits patiently with its output at ground potential until the input signal goes positive and then
starts following the input again. If you wish to substitute another op amp, check its performance first.... |
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Dual Polarity Power Supply 1: supply is easy to build and adjustable from0-15 volts (Electronic circuit added 5/02) |
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Dual Polarity supply provides ±12V from one IC: 04/29/04 EDN Design Ideas / (added 1/05) 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.... |
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Dual Regulated Power Supply: (Electronic circuit added 4/05) |
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Dual Regulators Power Pentium® Processor or Upgrade CPU: DN122 - Design Notes (Linear Technology) (added 2/06) |
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Dual Tracking + 15V: (Electronic Schematic / circuit added 4/02) |
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Dual Voltage Regulator meets USB Power needs: 08/19/04 EDN Design Ideas / (added 1/05) 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 |
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Dynamo Current and Voltage Regulator: (circuit added 05/07) |
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Easy Power Supply: (circuit / schematic added 6/05) |
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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. (circuit design added 3/05) |
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Explanation and Experiment About Regulated DC Power Supply: many power supply designs for different voltages, built from
discrete components (Electronic circuit added 5/02) |
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Extend the input range of a Low dropout regulator: 10/17/02 EDN Design Ideas / (added 1/05) 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.... |
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Finesse Regulator Noise: (Electronic circuit added 7/03) |
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Fixed Voltage Power Supply: (Electronic Schematic / circuit added 4/02) |
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Floating Input Extends Regulator Capabilities: DN21 - Design Notes (Linear Technology) (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. (circuit design added 3/05) |
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Flyback with V in 36-72 V and 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. (circuit design added 3/05) |
