555555555546. At –65ºC the minimum current that will trigger the series of an SCR is ________, while at +150ºC only ________ is required. (a) 20 mA, 100 mA (b) 50 mA, 75 mA (c) 75 mA, 50 mA (d) 100 mA, 20 mA
5555555555 5. In a 555 timer, a series connection of three resistors sets the reference voltage levels to the two comparators at ________ and ________. (a) 2VCC / 3, VCC / 3 (b) VCC / 2, VCC / 4 (c) VCC, VCC / 2 (d) VCC, VCC