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Scheme Keeps Current Drain Constant - 04/12/01 EDN-Design Ideas:.....(design idea
added 11/05) |
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Simple Current Source & Sink Circuits Have Low Tc - 07/04/96 EDN-Design Ideas:
(design idea added 3/03) |
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Simple Current-Sense Technique Eliminating a Sense Resistor AN-7 - Application
Note 7 from Microsem (app note added 6/06) |
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Simple Scheme keeps Current Drain Constant - 04/12/01 EDN-Design Ideas: PDF
contains multiple circuits, scroll to find this circuit.....(design idea added 05/03) |
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Simple Variable Voltage Source - The high current regulator below uses an
additional winding or a separate transformer to supply power for the LM317 regulator
so that the pass transistors can operate closer to saturation and improve efficiency.
For good efficiency the voltage at the collectors of the two parallel 2N3055 pass
transistors ..... (added 4/05) |
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Step Up/Step Down Converter Takes 2 to 16V Inputs - 07/02/98 EDN-Design Ideas:
(design idea added 3/03) |
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Step Up/Step Down Current Source Charges Batteries - 07/16/98 EDN-Design
Ideas:.....(design idea added 3/03) |
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Switching Regulator Forms Constant Current Source - 05/30/02 EDN-Design Ideas:
Many applications require current sources rather than voltage sources. When you need a
high-current source, using a linear regulator is inadvisable, because of the high
power dissipation in the series resistor. To solve the wasted-power problem, you can
use a switch-mode regulator. The circuit of Figure 1 uses IC1, an LM2576 adjustable
regulator.....(design idea added 1/05) |
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TSM108 Evaluatin Board 12V to 6V DC/DC Converter - The TSM108 is a step down
controller that features constant voltage and constant current regulation.The
Evaluation Board was designed to allow different converter configurations. Several
options for power semiconductor footprints are available on the PCB in order to make
it adaptable to a wide range of converter output power. In a first step, .....
(app note added 3/05) |
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Variable Voltage Source - The high current regulator below uses an additional
winding or a separate transformer to supply power for the LM317 regulator so that the
pass transistors can operate closer to saturation and improve efficiency. For good
efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors
should be close to the output voltage..... (added 4/05) |
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Voltage to Current Converter Makes a Flexible Current Reference - 09/18/03 EDN-Design
Ideas: The voltage-to-current converter in Figure 1 can both source and sink current.
The circuit is more flexible than some traditional current references that require
different topologies for current sourcing and sinking. Also, you can easily adjust the
value of the current reference by simply adjusting the circuit's input
voltage.....(design idea added 12/04) |
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Wide-Range Current-To-Frequency Converters - National Semiconductor Application
Note (app note added 2/06) |
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Zener oscillators - These two circuits are interesting from an academic point of
view. Their practical implementation is rather critical and it is not easy to get
steady operation. Circuit (a) requires a "cooked" zener: connect it first to a
constant current generator, then increase the current.... (added 9/07) |
