27-08-2013, 03:20 PM
CIRCUIT IDEAS FOR DESIGNERS
CIRCUIT IDEAS.pdf (Size: 96.94 KB / Downloads: 74)
Description
This circuit is a zero crossing detector, which produces an output state change whenever the input crosses the
reference input. In this case the reference input is connected to ground. The output of the comparator can
easily drive multiple outputs, which can include, for example, a relay, a control gate and a LED indicator. Note
that this circuit works with either open-drain or push-pull types of comparator output, depending upon the
load(s) to be driven. The load, in many cases, can also act as a pull-up device, so that a pull-up resistor is not
required. Alternatively, push-pull outputs can actively pull-up the output to shutdown the load. In either case
an output resistor and its associated power consumption are not required.