Resistors are called passive because they don’t have gain or control power like semiconductors or other active devices. But they can, and do, change the signal in unexpected ways because they have parasitic portions.
We see the analog design mistakes on ASICs all the time. We pick up a board and over in the corner is a piece of “oops logic,” a design feature that seemed right at the time but is clearly not working now. But there are ways to fix the “oops.”
We can never charge a capacitor completely, unless we wait for infinity. The reverse is also true when discharging a capacitor. In the case of a CRT starting at a high voltage, it will deliver a painful shock for a long time.
Capacitors, resistors, inductors, connectors, and even the PCB are called passive because they don’t seem to consume power. But these apparently passive components can, and do, change the signal in unexpected ways because they all contain parasitic portions.
The interaction of even small changes on other seemingly unrelated circuits requires constant vigilance. So, our design process must be iterative, changing small things to optimize the system’s overall power consumption.
Symphony conductors must know the sound and the capability of each instrument and each musician to direct a harmonious production. Similarly, a good designer must have a wide range of knowledge to ensure a well-integrated, power-efficient solution.
Advancing technology continues to advance the quality of the television pictures in our living rooms. Consumers see the quality of DVD and HDTV pictures and they demand better pictures from all video providers. Set-top box (STB) manufacturers have met t