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FET
Circuits, Page 7
FET Circuits: #'sAB-DE-HI-LMN-ST-Z Last Updated on:
Friday, October 16, 2009 03:45 AM
Circuits Designed by Dave Johnson, P.E. :
N-CH AND P-CH TRANSISTORS FORM PUSH-PULL DRIVER
This circuit can produce high speed output signals with fast rise and full times.
The unique change pump action allows the voltage of the upper P-ch device to range
from millivolts to hundreds of volts. The output current is only limited by the
rating of the transistors. I have used this circuit beyond 2MHz.
Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
N-CH & P-CH Transistor form Push-Pull Driver - This circuit can produce high
speed output signals with fast rise and full times. The unique change pump action
allows the voltage of the upper P-ch device to range from millivolts to hundreds
of volts. The output current is only limited by the rating of the transistors. I
have used this circuit beyond 2MHz. ….(designed by David A. Johnson)
New 500V Linear MOSFETs for a 120kW Active Load - Power MOSFETs are generally
designed as switches. Total power dissipated is the sum of "on"-state losses (Id2
x Rds(on) plus losses generated during the very short switching intervals.
Desirable characteristics include the lowest possible ON resistance....( app note
added 4/08)
Optimizing the Design of 3.5kw Single-MOSFET Power Factor Correctors - This
paper will define MOSFET gate drive requirements for minimum power losses and
lowest EMI, evaluate the layout techniques necessary to limit turn-off voltage
overshoots, and provide comparative data on package and mountdown options able to
deliver up to 3500W power output from 230V 50/60Hz AC mains. Application
Note Microsemi APT9901 ( app note added 4/08)
Power MOSFET is core of regulated DC electronic load - 03/17/05 EDN-Design
Ideas: 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(Fi3/05).....(design idea added 4/05)
Simple Circuit Detects Current Pulses - 01/06/94 EDN-Design Ideas: 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.....(design idea added
3/03)
Static Electricity/Negative Ion Detector - This circuit relies upon the extra high
input impedance of a FET, and also demonstrates the gate terminals sensitivity to
changes in voltage. (added 6/03)