Parallel Connection of IGBT & MOSFET Power Modules:  Application Note Microsemi-formerly Advanced Power Technology APT0405  ( app note added 05/07)

PINs and GaAs MESFET Switches-Effects On Linearity:  MicroNote 703 from Microsem  (app note added 6/06)

Poor Man's Frequency Converter for a squirrel Motor:  The idea is opposite of typical motor frequency converter where the main voltage is first rectified and later chopped to a variable frequency. Outputting voltage must be in proportion of frequency. The lower the frequency the lower the voltage must be. This simple circuit is operating as a cycloconverter. It picks every 3th half wave of  the inputting main voltage. The result is 1/3th from the frequency and even  from the voltage. It is near ideal and comparable to the normal motor frequency converter. Only limitation is the speed control. This is not stepless but usable speeds are 1/3th, 1/5th, 1/7th and so on from the mains freq. This circuit is dimensioned to the 1/3 frequency division. Increasing time constant of R2C1 it can operate in more lower speeds. (added 02/05)

Power MOSFET  Gate Driver Circuits using High Current Super-b Transistors: 6A Pulse Rated SOT23 Transistors for High Frequency MOSFET  Interfacing:  Zetec Semiconductors  Applications Notes A description of the MOSFET converter circuits' requirement for a high current buffer stage, a suggested range of Zetex high current capable, fast switching transistors, and circuit examples.   (app note added 2/06)

Power MOSFET  is core of regulated dc Electronic load:  03/17/05 EDN Design Ideas  / (added 5/05)  Designers use electronic dc loads for testing power supplies and sources, such as solar arrays or batteries, but commercial ones are often expensive. By using a power MOSFET in its linear region, you can build your own (Figure 1). It uses two simple feedback loops to allow the transistors to work as a current drain in current-regulation mode or as a voltage source in voltage-regu...

Push-Pull Complementary Power MOSFET  Driver:  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Quad MOSFET  Drivers for High:  Supertex Semiconductors (app note added 6/06)

Recommended Handling Procdures for Microwave transistor and MMIC Chips (1/92) :  Application Note California Eastern Laboratories Doc #929  (app note added 6/06)

Relay Toggle Circuit using a MOSFET  and Push Button:  (circuit / schematic design added 6/06)

Replace ORing Diodes with MOSFETs to Reduce Heat and Save Space:  DN363  Design Notes (Linear Technology)  (app note added 1/06)

RS-232c Level Converter using Transistors:  (circuit / schematic design added 6/06)

Select Vo by using EPAD Transistor and Resistor Ratios:  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Silicon Controlled Rectifier Model Railroad Throttles and London Model Railroad Group SCR Throttle:  The following is a schematic drawing of a Silicon Controlled Rectifier type throttle for use on larger scale model railroads. Three versions of this throttle are shown on this page. They are not sophisticated designs but work well and are tough and reliable. (added 02/05)

Simple 3 Transistor Audio Amp (50 Milliwatt):  (circuit / schematic design added 6/06)

Simple and Inexpensive High-Efficiency Power Amplifier Using New Apt MOSFETs:  Application Note Microsemi-formerly Advanced Power Technology APT9403  ( app note added 05/07)

Simple and Inexpensive High-Efficiency Power Amplifier Using New Apt MOSFETs:  Application Note Microsemi formerly Advanced Power APT9403 (added 05/07)

Simple 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.

Single Transistor Flyback Driver:  (electronic circuit added 9/02)

Single Transistor Forward Reference Design:  Single Transistor Forward with Vin 115/220 Vac and Vout 12 V. The output current 10 A with 120 W of output power. (added 6/06)

Single Transistor provides short circuit protection:  10/16/03 EDN Design Ideas  /  (added 1/05)  In certain dc/dc-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circuit. A nonsynchronous boost converter provides a direct path from the input to the short circuit through the inductor and the catch diode. Regardless of current-limit protection in the IC, when a short circuit exists in the load, extremely high cu......

Single transistor sequences multiple supplies:  08/08/02 EDN Design Ideas  / (added 2/06)  Many DSP chips, microprocessors, FPGAs, and AS ICs require multiple power supplies that must deliver different voltages in a specific start-up sequence. Out-of-sequence voltages can cause excessive input current, logic errors, or even device failure. To sequence different supplies, a common approach is to regulate a lower voltage from a higher voltage using a linear regulator.

SM-8 Introduction to Zetez's SM-8 Package:  Zetec Semiconductors  Applications Notes The SM-8 is an eight leadded version of the industry standard SOT223 transistor package. Using a number of leadframe options allows the assembly of dual transistors, dual ICs and hybrid combinations. This report provides an introduction to package attributes and includes example applications that benefit.   (app note added 2/06)

Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise:  National Semiconductor Application Note   (app note added 2/06)