12 Volt to 9 Volt DC Converter: Car Converter for12 Volt to 9V

2 Watt Switching Power Supply: from 6V to14V

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 .

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.

Circuit offers improved active rectification: 02/06/03  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

Full Wave Rectifier uses Current Feedback Amps: 03/27/97 EDN-Design Ideas

Full Wave Rectifier uses Current Feedback Amps: 07/20/95 EDN-Design Ideas

High Speed Rectifier uses No Diodes: 03/30/95 EDN-Design Ideas

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

Output Adjustable Flyback Converter:

Precision AC / DC Converters: National Semiconductor Application Notes,28-Jun-1996

Precision Rectifier is Glitch Free to 1 MHz: 05/12/94 EDN-Design Ideas

Precision Rectifier Reduces Ripples: 03/03/97 EDN-Design Ideas

Step Down Rectifier Makes a Simple DC Power Supply: 04/09/98 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

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.

Transformerless Power Supply:

True RMS Detector: National Semiconductor Application Notes,28-Jun-1996

tw1o OpAmps Make Fast Full Wave Rectifier: 03/14/96 EDN-Design Ideas

tw1o Watt Switching Power Supply: from 6V to14V

Unregulated Power Supply: