Convert periodic waveforms to
square waves:
08/16/2001 EDN - Design Ideas / Converting
periodic waveforms to square waves is an
integral part of extracting a clock signal from
data, creating waveform generators, and making
timing-pulse generators. Any
square-wave-conversion circuit is more valuable
when the square wave's duty cycle is variable
and controllable. Figure 1 shows a circuit that
has these attributes and can drive several TTL-compatible
loads..
Square wave modulator has
variable frequency and pulse width:
08/08/2002 EDN - Design Ideas / A few years
ago, I worked at a disk-drive company. We had a
plating facility that required square waves to
drive the high-voltage plating operation. The
challenge was that the square wave's pulse width
had to be variable, along with the duty cycle.
Also, the amplitude of the pulses had to be
adjustable..
Tiny Programmable Oscillator
Operates From 5 kHz To 20 MHz:
08/06/01 Electronic Design - Ideas for Design /
By merging a digital potentiometer with an
oscillator chip, a very small programmable
oscillator (1 �MAX and one SOT-23 package) can
be realized. In addition to consuming very
little board space, the circuit requires only
three signals from a. .