12 Volt to 9 Volt DC Converter: Car
Converter for12 Volt to 9V
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2 Watt Switching Power Supply: from 6V
to14V |
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5 Volt DC From RS232 Signals: The
circuit of Figure1 produces a
semi-regulated5-Volt output from an RS-232
port. Unlike a PC-mouse supply or
comparable that rely on the modem-control
signals DTR and RTS, this one operates with
a3-wire port GND, Rx, and TX, and obtains
power only from the TX line. The output
current-about 8mA-is sufficient for CMOS
microcontrollers and other low-power .
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6 to 12 Volt Converter: This circuit can
provide up to 800mA of12V power from a 6V
supply. The circuit is simple, about 75%
efficient and quite useful.
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Circuit offers improved active rectification:
EDN-Design Ideas / Rectifiers convert ac
signals to dc. You can combine a diode and a
load resistor to create a half-wave
rectifier, provided that the amplitude of
the ac source is much larger than the
forward drop of the diode (typically 0.6V).
Unfortunately, you can't use this method to
rectify signals that are smaller than a
diode drop... |
DC to DC Converter: will produce a
85-Volt voltage from +3V, usable for low
power applications |
Fast Rectifier Circumvents Input Level
Effects: 12/22/94 EDN-Design Ideas
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Full Wave Rectifier uses Current Feedback
Amps: 03/27/97 EDN-Design Ideas
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Full Wave Rectifier uses Current Feedback
Amps: 07/20/95 EDN-Design Ideas
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High Speed Rectifier uses No Diodes:
03/30/95 EDN-Design Ideas
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Method provides self timing for synchronous
rectifiers: 05/16/2002 EDN - Design
Ideas / Synchronous rectifiers are
MOSFETs, driven in such a way as to perform
a rectifying function. They often take the
place of diodes in the output-rectification
stage of switching power converters, because
of their lower on-state power loss. In power
circuits, synchronous rectifiers are often
complicated to use because of timing
issues.. |
One 9 Volt Battery gives +18, +25, +33V:
This circuit is based on MAX1044 is a charge
pump converter. |
OpAmp Rectifier Signals Input State:
07/21/94 EDN-Design Ideas
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Output Adjustable Flyback Converter:
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Precision AC / DC Converters: National
Semiconductor Application Notes,28-Jun-1996
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Precision Rectifier is Glitch Free to 1 MHz:
05/12/94 EDN-Design Ideas
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Precision Rectifier Reduces Ripples:
03/03/97 EDN-Design Ideas
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Step Down Rectifier Makes a Simple DC Power
Supply: EDN-Design Ideas - A
simple and useful nonisolated rectifier
features voltage step-down operation,
acceptable Class A line-current harmonics,
inherent short-circuit protection, and,
optionally, a regulated output
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Transformerless Mains Power Supply: This
power supply does not really excel in power
efficiency, but it is the cheapest and most
compact solution for a small power supply.
Note that the low voltage output is directly
connected to the mains; it cannot be used
when the low voltage part can be touched.
With the component values of the schematic,
the circuit can supply12V /15mA max.
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Transformerless Power Supply:
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True RMS Detector: National
Semiconductor Application Notes,28-Jun-1996
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Two OpAmps Make Fast Full Wave Rectifier:
03/14/96 EDN-Design Ideas
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Two Watt Switching Power Supply: from 6V
to14V |
Unregulated Power Supply:
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