Summary
- Switchers are more complex than they first appear, even down to the silicon components
- Everything from the rectifier diodes to the switching transistors generates noise, much of it owing to switching speed and consequent transients
- Slowing the transition between states and selecting transistors can reduce this noise, but it’s difficult to eliminate completely
- However, it is fortunate that switching times are not zero, as this would generate considerably more RF energy at high frequencies
By Bryan Cockfield
Original Article