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Field-Effect Transistor Circuits
FET Circuits: 
#'s     A      B-D      E-H      I-L      M       N-S     T-Z
Last Updated on: Tuesday, August 18, 2015 06:55 AM


Circuits Designed by Dave Johnson, P.E. :

Bi-Directional Charge Coupled Powers 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 . . . [Hobby Circuit designed by Dave Johnson P.E.,  06/03/00]

 

Characteristics of CMOS Logic Inverter Amplifiers -  This chart shows some of the measured characteristics of three different unbuffered CMOS logic gates, used as voltage Amplifiers . . . [Hobby Circuit designed by David Johnson P.E.,  02/11/02]

 

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 . . . [Circuit by Dave Johnson P.E.,  06/03/00]

 

Charge Coupled MOSFET Relay #2 -  This circuit acts as an AC/DC relay with a rating up to 50 volts peak and up to 10 Amps of current. The differential oscillator supplies voltage to the gates of the two FETs with good isolation will drawing only 1. 5ma of current . . . [Circuit by David Johnson P.E.,  10/16/05]

 

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 by David Johnson P.E.,  07/08/00]

 
Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Basic EPAD MOSFET Connection with Current Source Drive -  Circuit Ideas for Designers App Note - . . .  [Advanced Linear Devices, Inc]

 

Basic MOSFET/ EPAD MOSFET Inverter Circuit -  Circuit Ideas for Designers App Note - . . .  [Advanced Linear Devices, Inc]

 

Basic MOSFET/EPAD MOSFET Diode-Connected Circuit  -  Circuit Ideas for Designers App Note - . . .  [Advanced Linear Devices, Inc]

 

Better MOSFET H Bridge -  Schematic only - no circuit desciption included. . .  [Eugene Blanchard]

Bi-Directional Charge Coupled Powers 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 . . . [Hobby Circuit designed by Dave Johnson P.E.,  06/03/00]

Bit Reverser Scrambles Data for FFT -  03/02/95 EDN Design Idea   The hardware bit-reverse and linear-address generator in Fig 1a scrambles a time-domain digital N-sample record. The circuit is primarily meant to scramble data before taking a real-time butterfly FFT and can follow a formerly published EDN Design Idea   ("DAC and P implement hardware window generator," March 31, 1994, pg 58). . .  [by Alan Land, CRS Electronics, Pittsburgh, PA]

 

Capabilities of Low-Cost High Voltage RF Power MOSFETs At Hf & Vhf -  Application Note Microsemi-formerly Advanced Power Technology APTB981. . .  [Microsemi Corp]

 

Cascode MOSFET increases boost regulator's input-and output-voltage ranges -  09/01/05  EDN Design Idea   Simple enhancement extends range of both sides of regulator. . .  [by Scot Lester, Texas Instruments, Dallas, TX]

 

Characteristics of CMOS Logic Inverter Amplifiers -  This chart shows some of the measured characteristics of three different unbuffered CMOS logic gates, used as voltage Amplifiers . . . [Hobby Circuit designed by David Johnson P.E.,  02/11/02]

 

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 . . . [Circuit by Dave Johnson P.E.,  06/03/00]

 

Charge Coupled MOSFET Relay #2 -  This circuit acts as an AC/DC relay with a rating up to 50 volts peak and up to 10 Amps of current. The differential oscillator supplies voltage to the gates of the two FETs with good isolation will drawing only 1. 5ma of current . . . [Circuit by David Johnson P.E.,  10/16/05]

 

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 by David Johnson P.E.,  07/08/00]

 

Circuit Detects Current Pulses -  01/06/94  EDN Design Idea   The pulse detector provides a visible indication of positive and negative current pulses. The pulses Amplitudes can vary from 20 to 150 mA. The pulses durations can range from 10 to 40 msec, and their repetition rate can span 40 to 180. . .  [by Richard McGillivray, Grey Bruce Regional Health Centre, Owen Sound, Ontario, Canada]

 

Circuit improves on bias for GaAs FETs -  12/06/01  EDN Design Idea   It's important to properly sequence the bias applied to an RF/microwave GaAs FET or a MMIC (monolithic-microwave-IC] Amplifier. These devices are extremely sensitive to drain and gate voltage levels as well as to the order in which t. . .  [by Tom Roberts, Anritsu Co, Morgan Hill, CA]

 

Circuit Lets You Characterize JFETs -  04/06/12  EDN Design Idea   Measure the pinch-off voltage VP and zero-bias drain current IDSS to select matched pairs of JFETs. . .  [by John Fattaruso, Dallas, TX]

 

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Field-Effect Transistor Circuits
FET Circuits: 
#'s     A      B-D      E-H      I-L      M       N-S     T-Z


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