

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

Circuit Simultaneously Delivers Square & Square Root Of Two Input Voltages  03/01/12 EDNDesign Ideas  Use a common CMOS
gate to make long duration timers using lowvalue RC components. The CD4011 CMOS
NAND gate has a typical input current of 10 PA at room temperature. You can charge a capacitor connected to the gate input with currents on the order of hundreds of picoamperes and neglect the influence of the gateinput current on the charging time of the capacitor. You normally need largevalue resistors to limit currents to this low level. These resistors are not commonly available. You can instead use a transistor as a current attenuator, despite its more usual amplifying nature. __ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia 


Simultaneously Deliver Square & Square Root of Two Input Voltages  03/01/12 EDNDesign Ideas  Use a common CMOS
gate to make long duration timers using lowvalue RC components. The CD4011 CMOS
NAND gate has a typical input current of 10 PA at room temperature. You can charge a capacitor connected to the gate input with currents on the order of hundreds of picoamperes and neglect the influence of the gateinput current on the charging time of the capacitor. You normally need largevalue resistors to limit currents to this low level. These resistors are not commonly available. You can instead use a transistor as a current attenuator, despite its more usual amplifying nature. __ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia Square Root Function Improves Thermostat  09/30/99 EDNDesign Ideas  Perhaps the most elementary rule of controlloop design theory is that feedbackloop performance is fundamentally linked to the careful choice—and stability—of loop gain. Insufficient loop gain leads to poor setpoint accuracy. Too much gain can induce feedback instabilities, __ Circuit Design by W Stephen Woodward, University of North Carolina, Chapel Hill, NC
SquareRoot Circuit  This circuit generates the square root of the input at a reference voltage. Such type of squareroot output is normally used in R&D labs. Fig.1 shows the proposed circuit. A sawtooth...__ Electronics Projects for You
Take Square Root of Input Voltage  11/20/97 EDNDesign Ideas  For an NMOS transistor operating in the saturation region, the relationship between the drain current, ID, and the gatesource voltage, VGS, is governed by the squarelaw equation __ Circuit Design by Mark Shill, BurrBrown Corp, Tucson, AZ


Math Function:
Square Root 

