a circuit that consists of resistors and capacitors designed to change a dc input to an ac output. it is used to make narrow pulse generators and to trigger digital logic circuits. when used in integrated circuits it is known as an inverter. or lntegrated circuits that produce logic voltage signals or pulses that have only two levels of output that are either on or off (yes or no). some component output examples are: diagnostic codes output pulse width modulated (pwm) throttle output auxiliary speed output and fuel flow throttle output.