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Method for Calculating Output Voltage Tolerances in Adjustable Regulators: National Semiconductor - Application Note
(app note added 2/06) |
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Method to Determine How Much Power a SOT23 can Dissipate in an Application: Microchip Application Note -
Published 18-Jul-01 (Circuit / schematic design added 6/06) |
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Micropower Voltage Reference: National Semiconductor Application Notes,28-Jun-1996/ (added 3/’03) |
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Mini-Drill Variable Power Supply: T1 steps down AC voltage from 115VAC (or 220VAC) to about 8VAC and is then rectified via
bridge rectifier BR1 to about 11.52Vdc. C1 filters off the AC ripple. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals.
Value can be between 10 and 100uF/25V. The output voltage is variable with the 10K-potentiometer while keeping the current constant... (added 2/06) |
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Monolithic Step-Down Regulator Withstands the Rigors of Automotive Environments and Consumes Only 100µA of Quiescent Current:
DN378 - Design Notes (Linear Technology) (added 1/06) |
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Monolithic Synchronous Regulator Drives 4A Loads with Few External Components: DN328 - Design Notes (Linear
Technology) (added 1/06) |
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Monolithic Synchronous Step-Down Regulators Pack 600mA Current Rating in a ThinSOT Package: DN300 - Design Notes
(Linear Technology) (added 1/06) |
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MOSFET Circuit UPS Regulator's Output Current: 02/01/96 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)
-- Use a current mirror and a power MOSFET to increase the output-current capability of an IC-voltage regulator |
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MOSFET Switch provides efficient AC/DC conversion: 02/17/00 EDN-Design Ideas / (Electronic circuit added 10/03) |
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MOSFETshunt regulator substitutes for series regulator : 11/25/04 EDN-Design Ideas / (added 5/05) You
would normally use a series linear regulator or a dc/dc converter to obtain 3V dc from a higher supply. However, when breadboarding a concept, you may be able to use a shunt regulator,
especially if a series regulator of the correct voltage is unavailable. The MOSFET in Figure 1 can replace a zener diode in a shunt regulator and provide lower output impedance than a zener
diode.... |
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Multiple Voltage Power Supply: (circuit / schematic added 6/05) |
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National Semiconductor Dual High-Current Power Supply Kit: The National Semiconductor Power Supply Kit is designed around
the National LM2636, a synchronous buck regulator. It provides over 28 amps of current with variable output voltages ranging from +1.3V to +3.3V. (circuit design added 3/05) |
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Negative Flyback with V in 12 V and V out-5 V: This reference design is for a -12V at 1A Negative Flyback Converter. The
UC3572 converts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external
PMOS switch. (circuit design added 3/05) |
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Negative Regulator has 04 Volt Dropout Voltage: 11/06/97 EDN-Design Ideas / (added 6/03) |
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New High Efficiency Monolithic Synchronous Step-Down Regulator Works with Single or Dual Li-ION Batteries:
DN201 - Design Notes (Linear Technology) (added 1/06) |
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New Micropower Low Dropout Regulators Ease Battery Supply Designs: DN121 - Design Notes (Linear Technology) (added
2/06) |
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New Voltage References Are Smaller and More Precise: DN145 - Design Notes (Linear Technology) (added 1/06) |
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NiMH Battery Charger Reference Design: This manual describes a reference design for a NiMH battery charger that uses the
Motorola MC68H(R)C908JK3E MCU. The MC68H(R)C908JK3E includes a 10-channel Analog-to-Digital Converter (ADC) and a 2-channel Timer Module which can be programmed to generate PWM signals. This
feature makes this MCU suitable for applications such as a NiMH or NiCd battery charger. (circuit design added 3/05) |
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Nine-Volt Stabilized Power Supply: (Circuit added 9/04) |
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OpAmp Makes Precise 9 Volt Battery Splitter: 07/17/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)
-- Alkaline 9V batteries are ideal for many portable, handheld applications, this circuit generates a bipolar supply of5V and 2.3 to 4V using a precision5V reference and one op amp as a
supply splitter.... |
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Over/Under Voltage Cut-Out: This
over/under voltage cut-out will save your costly electrical and electronic appliances from the adverse effects of very high and very low mains voltages. The circuit features auto reset and
utilises easily available components. It makes use of the comparators available inside 555 timer ICs. Supply is tapped from different points of the power supply .... (added
10/06) |
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Pass Regulator's Output Ranges from 0 to 20V: 04/13/95 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) |
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Pass Transistor Lowers Dropout Voltage: 02/18/99 EDN-Design Ideas / (added 6/03) With linear regulators,you measure dropout
voltage, VIN–VOUT, at the minimum input voltage for which the IC sustains regulation. Low dropout means longer battery life, because the load circuit continues to operate while the battery
discharges to a lower terminal voltage. The external transistor helps to form a linear-regulator circuit whose dropout voltage at 100-mA load current is only 10 mV (Figure 1). .... |
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Portable CD Player Adapter for Car: steps down the12V from the lighter socket to 9V which is used by some CD players (Sony
Discman) (Electronic circuit added 5/02) |
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Positive regulator makes dual negative output converter: 06/26/03 EDN Design Ideas / (added 1/05) Some
systems, such as optical networks, require more than 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. Independently creating each of the two negative voltages requires the use of two switching-regulator ICs.... |
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Positive regulator makes negative DC/DC converter: 12/26/02 EDN Design Ideas / (added 1/05) 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 voltages far outnumber these negative-feedback regulators.... |
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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. Once sufficient energy is stored in the inductor, the high side switch is turned off. The inductor current drives the switching node negative and....
(circuit design added 3/05) |
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Power Supply Circuit Tracks Control Input: 12/21/95 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)
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Power Supply Converted from a PC (link): (add 9/04) |
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Power-Supply Failure Alarm: (Electronic Circuit / Schematic added 10/04) |
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Precision reference bans precision resistors: 06/10/99 EDN-Design Ideas / (added 2/06) |
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Precision Reference uses Only Ten Microamperes: National Semiconductor - Application Note (app note added 2/06) |
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Proportional thermoregulator synchronizes to line: 04/13/00 EDN-Design Ideas / (added 2/06) |
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Protection Feature Enhances Boost Converter: 10/27/94 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) A
boost-topology switching regulator is the simplest solution for converting a two- to three-cell input to a 5V output. Unfortunately, boost regulators have several inherent disadvantages,
including a lack of short-circuit protection and shutdown capability. In some battery-operated products, external chargers or adapters can raise the battery voltage to a potential higher than
the 5V output. ... |
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RD68HC908IRC : MC68HC908QT2 Based Simple Infrared Remote Control Reference Design: Motorola has developed a simple, single
dedicated device, infrared remote control designed to control a DVD player. This reference design demonstrates how to time and create modulated infrared signals used to control six basic
functions of the DVD player. (circuit design added 3/05) |
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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 (circuit design added 3/05) |
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Rearranged reference helps ADC measure its own supply Voltage: 04/28/05 EDN Design Ideas / (added 5/05) Clever
topology allows self-measurement of power supply rail. |
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Reduce Voltage Reference output noise by half: 02/03/05 EDN Design Ideas / (added 5/05) 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. |
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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 is then demodulated providing power output for driving loudspeakers. This patented technology provides low cost, high
quality, high efficient digital audio applicable to many audio systems developed for the digital age. .... (circuit design added 3/05) |
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References for A/D Converters: National Semiconductor Application Note 04-Nov-1995/ (added 3/’03) |
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Regulated 12 Supply: This circuit above uses a 13 volt Zener diode, D2 which provides the voltage regulation. Approximately
0.7 Volts are dropped across the transistors b-e junction, leaving a higher current 12.3 Volt output supply. This circuit can supply loads of up to 500 mA. This circuit is also known as an
amplified Zener circuit. (added 10/05) |
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Regulated 12V supply: (added 04/05) |
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Regulated DC Power Supply: many power supply designs for different voltages, built from discrete components/ (added 3/’03) |
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Regulator Circuit Generates Both 3.3V and 5V Outputs from 3.3V or 5V to Run Computers and RS-232: DN71 - Design Notes
(Linear Technology) (added 1/06) |
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Regulator Excels in Noise and Line Rejection: 01/02/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)
-- Certain electronic circuits require extremely low-noise power supplies and this circuit provides very good quality power output |
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Regulator Generates SubBandgap Voltages: 01/02/97 EDN-Design Ideas --100-mA regulator that uses a dual linear-regulator IC
to produce output voltages below1.25V from2.9 to5.5V input-voltage range/ (added 3/’03) |
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Regulator has One Active Part: 03/16/95 EDN-Design Ideas / (added 03/03) |
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Regulator IC forms convenient overVoltage detector: 09/28/00 EDN Design Ideas / (added 2/06) |
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Regulator Makes Dual Tracking Reference: 11/07/96 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) |
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Regulator Monitors Its Input Voltage: 09/12/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) |
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Regulator Provides ±12V from 5V Source: National Semiconductor - Application Note (app note added 2/06) |
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Renkus Heinz Controller Power Supply: outputs regulated +-15-Volt (Electronic circuit added 5/02) |
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RFRXD0420 ASK Receiver Reference Design: Microchip Application Note - Published 27-Dec-02 (added 2/06) |
