Electroschematics News and Insights - EDN

There are many ways of generating analog sawtooth waveforms with oscillating circuits. Here’s a method that employs a single supply voltage rail to produce a buffered signal whose frequency can be varied over a range from 10Hz to 1MHz (Figure 1).
Figure 1 The sawtooth output waveform is the signal “saw” available at the output of op amp U1a. Its frequency is set by the value of resistor R6 which can vary from 120 Ω to 12 MΩ....

A topic that has recently drawn a lot of interest (!) and no fewer than four separate design articles (!!) here in Design Ideas, is the conversion of 0 to 20mA current sources into industrial standard 4mA to 20mA current loop signals. Here’s the list...

Many years ago, I overheard an engineer, with whom I had some project contact, make a casual remark about an RF connector situation, asking “what’s the big deal, it’s just a connector?” That statement was enough to make me wonder about his overall professional...

It is well known that a 555 timer in astable mode can be frequency modulated by applying a control voltage (CV) to pin 5. The schematic on the left of Figure 1 shows this classic 555 VCO.
Figure 1 Classic VCO (left) and new 555 VCO variant (right), where Pin 5 is not modulated, which leads to a constant 50% pulse width, independent of frequency....