• CHARGE PUMP EFFICIENTLY DIVIDES SUPPLY VOLTAGE
  This circuit uses a few FETs and logic devices to down convert a DC voltage to about one half its value.

• CIRCUIT PROTECTS FROM BATTERY POLARITY REVERSAL
  This simple circuit can protect a sensitive electronic circuit from an accidental connection of a battery with a reversed polarity.  The N-channel FET connects the electronic device to the battery only when the polarity is correct.  The circuit shown was designed for a device powered from a single 1.5 volts button cell battery.  However, the circuit will operate with higher voltages as well.

• CHARGE COUPLED BI-DIRECTIONAL POWER MOSFET RELAY
  The circuit uses an inexpensive C-MOS inverter package and a few small capacitors to drive two power MOS transistors from a 12v to 15v supply. Since the coupling capacitor values used to drive the FETs are small, the leakage current from the power line into the control circuit is a tiny 4uA. Only about 1.5mA of DC is needed to turn on and off 400 watts of AC or DC power to a load.

Basic EPAD MOSFET  Connection with Current Source Drive:  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Basic MOSFET  /EPAD MOSFET  Diode-Connected Circuit :  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Basic MOSFET / EPAD MOSFET  Inverter Circuit:  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Basics of EL Panel Drive Techniques:  Supertex Semiconductors  (app note added 2/06)

Bipolar Transistor Boosts Switcher's Current by 12 times:  05/24/01 EDN-Design Ideas / (added 8/03)

Bipolar Transistor Considerations for Battery Powered Equipment: Leading to Efficiency and Competitive Advantages in Portable Systems:  Zetec Semiconductors  Applications Notes Bipolar products provide many performance advantages in modern battery powered systems. This note reviews  parametric and circuit related characteristics of high performance Bipolar devices and MOSFETs, and provides some application examples in which  Bipolar option gives  most credible solution.   (app note added 2/06)

Bit reverser scrambles data for FFT:  03/02/95 EDN-Design Ideas / (added 2/06)

Capabilities Of Low-Cost High Voltage RF Power MOSFETs At Hf and Vhf:  Application Note Microsemi-formerly Advanced Power Technology APTB981  ( app note added 05/07)

Circuit Detects Current Pulses:  01/06/94 EDN-Design Ideas / (added 3/03)  The pulse detector provides a visible indication of positive and negative current pulses. The pulses amplitudes can vary from20 to150 mA. The pulses durations can range from10 to40 msec, and their repetition rate can span40 to180 pulses/minute.

Circuit optimizes PhotoTransistor Bandwidth :  04/09/98 EDN-Design Ideas / (added 6/06)  

Circuit provides ISFETsensor Bias:  06/10/04 EDN Design Ideas  / (added 11/05)  ISFETs (ion-sensitive field-effect transistors) are useful for measuring the acidity of fluids. Accurate measurements require that the ISFET's bias conditions (ID and VDS) be held constant while the gate is exposed to the fluid under test. The acidity of the fluid changes the channel width, resulting in a gate-source voltage, VGS, that is proportional to the fluid's pH.

Circuit reduces negative Voltage stresses on Control IC:  04/18/02 EDN Design Ideas  /  (added 1/05)  In a synchronous, buck switching power supply, the two FETS and the output inductor meet at the phase node (Figure 1). The phase node often connects directly to the control IC. The voltage on this node swings from the input voltage to some voltage lower than ground. If the voltage goes too far below ground, the ESD structures or other circuitry within the control IC can become forward-bia... ...

Considerations for Driving Power MOSFETs in High-Current, Switch Mode Regulators:  Microchip Application Note Published 12-Nov-02   (app note added 2/06)