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Various Switching Power Supplies
- Page has several circuits, please scroll through all of them.
. . [Bill Bowden's website]
Very Low Power Astable
Multivibrator - This classic circuit draws only
200 nanoamps from a 1. 5v supply . . . [Circuit by Dave Johnson P.E., 06/10/00]
Very Low Power Gated Crystal
Oscillator - The circuit gates the output of a
continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed.
The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going
and switching on a transistor power stage only as needed . . . [Circuit by David Johnson P.E., 06/03/00]
VFD (Vacuum Fluorescent Display) Flyback Power
Supply - The LT3758 is a wide input range, current
mode, DC/DC controller which is capable of generating either positive or negative output voltages. It can be
configured as either a boost, flyback, SEPIC or inverting converter. The LT3758 drives a low side external
N-channel power MOSFET from an internal regulated 7. 2V supply. The. . . [Linear Technology App Note, Jan
16th 2012]
Voltage Boost
- In this design a marginal AC to DC linear power supply
provides a voltage boost, so it can maintain regulation at low line voltages. The added components are wired
at the AC input and the + DC output of an existing bridge rectifier circuit. The components act as a full
wave “charge pump” which will boost the DC output voltage across the main filter capacitor C3. Without the
boost circuit, when the AC line voltage drops to 105vac, the DC output voltage only reaches 11. 5 volts, too
low for a 12v voltage regulator. . . . [Hobby Circuit designed by Dave Johnson P.E., 07/18/06]
Voltage Boost to
Series Regulator provided by Capacitor - This
circuit adds some capacitors and diodes to a traditional transformer type series regulator circuit to extend
the normal operating range. It can insure regulation during low line voltage conditions or it can squeeze a
few more watts out of a plug-in-the-wall power adapter power supply . . . [Hobby Circuit designed by David
Johnson P.E., 01/01/98]
Voltage Converter
- . . . [from Harry Lythall's website]
Voltage
Converters-0.5 to 6 Volts - Conventional silicon
transistors just can't operate at voltages less than about 0. 7v. Old germanium transistors could be used,
but those are hard to find these days and most are rather large in size. Some new n-channel MOSFET devices
with very . . . [Circuit by Dave Johnson P.E., 05/21/07]
Voltage Difference Magnifier
- NOTE: Must register on this site. . . [Published in Elecktor
July/August, 2010]
Voltage doubler
- this circuit roughly doubles the voltage of the input, however
the current output is low. doubled output is at 'V source. ' . . . [Andy Wilson's site]
Voltage Doubler Design & Analysis
- Application Note. . . [National Semiconductor]
Voltage Inverter
- simple and inexpensive circuit can produce a dual (positive and negative)
voltage from a single supply input, extremely useful for powering OpAmp and other circuits that require a
dual voltage from a single battery. . . . [Circuit designed by Aaron Cake]
Voltage Inverter
- This circuit inverts the polarity of the input. output is limited to
less that 200mA. . . . [Andy Wilson's site]
Voltage Inverter IC Forms
High Efficiency Rail Splitter - Application Note
#218. . . [Maxim Integrated]
Voltage Inverter II
- . . .
Voltage Level Translator-23001.0 - Circuit Ideas for Designers App Note. . . [Advanced Linear Devices, Inc]
Voltage Level Translator-23002.0 - Circuit Ideas for Designers App Note. . . [Advanced Linear Devices, Inc]
Voltage Limiter Generates
Supplies That Improve Standard Diode Technique - Some
systems require a voltage limiter to protect the input circuit. Designers can connect diodes to V CC and Gnd
to create a simple solution (Fig. 1). This simplicity, however, comes at a. . . [Electronic Design Europe
10.02.11 Yossi Barkan-Circuit Designer]
Voltage Multiplier Circuit
- A collection of simple but useful circuits made with silicon
diodes. Scroll to find the voltage multiplier circuit. . . . [Jose Pino designer]
Voltage Regulator
- Simple regulated12V power supply using1-transistor regulator
circuit. Designed by Mick Devine. . . [Andy Collison's website]
Voltage-To-Current Converter Makes A Flexible Current Reference
- 09/18/03 EDN Design Idea The voltage-to-current converter in
Figure 1 can both source and sink current. The circuit isflexible than some traditional current references
that require different topologies for current sourcing and sinking. Also, you can easily. . . [by Art Kay,
Texas Instruments, Tucson, AZ]
Voltage-to-Current converter offers precisely defined dead-band
- 07/29/13 EDN Design Idea Dead-bands have application in control
loops and other areas. In the control of nonlinear and linear systems, sometimes a slight nonlinearity is
intentionally inserted into the closed control loop. “Slight” here means that the output of the inserted
element starts to vary linearly, but only once the input exceeds a nonzero threshold value. For inputs from
zero to the threshold, the output of the element has zero value. The result is that adding of this nonlinear
element can quench damped oscillations, which are typical for feedback systems. . . . [by Marian Stofka]
Voltage-to-period converter improves speed, cost, and linearity of A-D conversion
- 09/02/13 EDN Design Idea Turning a VFC on its head improves
many parameters. . . [by Jordan Dimitrov]
Wide Band Zero Cross
Detector - This circuit was designed to convert a
low amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv
peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about
150 . . . [Circuit by David Johnson P.E., 02/18/06]
Wide-range regulator delivers 12V, 3A output from 16 to 100V source
- 06/23/05 EDN Design Idea Buck regulator tackles high input
voltages. . . [by Wayne Rewinkel, National Semiconductor, Schaumburg, IL]
Wide-range voltage regulator automatically selects operating-mode
- 06/09/05 EDN Design Idea Regulator seamlessly adapts to
wide output range. . . [by Joel Setton, Crolles, France]
Xenon DC-to-DC Converters!
- . . . [Don Klipstein's Web Site]
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