Nick Ierfino Electronic Design It’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 ...
19-03-2018
Tom Bruhns EDN The novelty circuit in Figure 1 illustrates the extremely low gate-leakage current typical of modern power MOSFETs. You can find parts that, in a moderately dry environment, will hold their state for days at a time. In operation, if ...
11-03-2018
Sundaresan Sundararaj Electronic Design This idea describes a white-LED (WLED) driver circuit controlled by a simple ambient light sensor (ALS). A typical application would be a brightness control for cell-phone backlighting. On a very sunny day, ...
11-03-2018
Ken Yang Electronic Design RF gain blocks (amplifiers) are popular because they offer wide bandwidth, low noise, and ease of use. They're designed to operate with a fixed value of supply current because variations in supply current cause ...
03-03-2018
Jean-Bernard Guiot EDN Controlling a small dc motor without speed control sounds like a trivial task; a switch or a relay should suffice. However, several problems accompany this approach. For one, the switch, because of the inductive load and the ...
03-03-2018
Stephan Goldstein, Analog Devices EDN The human eye's highly nonlinear response to light levels poses problems for designers of adjustable lighting. Simple hardware or software linear-control methods compress most of the apparent intensity ...
27-02-2018