Pulse Stretcher Increases ECL Gate Gains:
01/20/94 EDN-Design Ideas / stretches the output
pulses of an ECL comparator by operating the ECL
line receivers with unusually large pulldown
resistors to the -15V supply. The large load
resistance maximizes the gains of the
emitter-follower output stages and speeds up the
rising edges. At the same Time, the low pulldown
current, together with the input and wiring
capacitances, slows the falling edges. These actions
stretch the positive pulses by approximately2 nsec/stage.
Soft On / Off Switch: Modern electronic
equipment incorporates "push-to-on-push-to-off"
switches that do not make the clicking noise as with
old equipment. An example of this is the power
button on an ATX computer cabinet. Here is a circuit
that does the same. It can be used to turn on/off
any electronic/electrical equipment that operates on
any range of voltages. FAIR WARNING -- THIS SITE HAS
ANNOYING POP UP ADS.
