an improved programmable duty cycle generator and method of operation . in one aspect , the generated output signal duty cycle is not measured , but rather is generated based on a predetermined value . saw tooth generator / integrator schemes are used to create the saw type waveforms of the incoming frequency which in conjunction with dac is used to create the desired duty cycle . the improved programmable duty cycle signal generator for placement in key pinch points of a critical path where precise duty cycle definition is needed .