Nick Ierfino is a senior engineer at IGS Technologies, Montreal, Quebec, Canada. He holds a BSC Eng Telecommunications from Concordia University, Montreal, Quebec, and a DEC in electrotechnology from Dawson College, Montreal. Email address: NickI@IGSTechnologies.com
2 results found for Nick Ierfino, displaying items 1 - 2
March 12, 2009[Ideas For Design] Use Variable DC Voltage To Control 70-MHz Output Phase Shifter
In many situations, designers must control the phase of an output signal in order to make certain circuits work properly. At low frequencies, an op amp can be used to vary the phase. But as the frequency gets into the RF range, output phase control gets a bit more complex. The figure illustrates an example of how to control the phase at higher frequencies. I randomly chose 70 MHz for the circuit, but any ...
December 13, 2007[Ideas For Design] Input Clock Adjusts Frequency Of Digital Ramp Generator
Itâ??s not always easy to design a ramp generator whose ramping frequency can be changed without manipulation of capacitors or inductors. Many ramp circuit designs are available, but they may not be flexible when it comes to varying the rise time. The digital ramp generator circuit in the figure, however, can vary the ramp frequency from less than 1 Hz to about 30 kHz just by varying...
