Author - James Henden

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James Henden	Write for Electronic Design
James Henden is a principal engineer at New Wave Research, Fremont, Calif. Email address: jhenden@new-wave.com
1 results found for James Henden, displaying items 1 - 1

September 1, 2007 [Ideas For Design]
Drive A Resistive Heater Element Without Adding Noise To The System
This circuit drives a resistive heater element with a low-frequency, pulse-widthmodulation (PWM) voltage source, providing heat output that's directly and linearly proportional to the duty cycle of the drive signal. The circuit's low-power and low-frequency (approximately 1-kHz) drive contributes little noise to the system, especially if the driving circuit uses a generic Darlington transistor producing relatively slow (3-µs) rise and fall times. In addition, little, if any,...