Rectangular pulse generators feature independent frequency and duty-cycle adjustment - EDN
5 function generator circuit are suitable for you | ElecCircuit.com
Rectangular pulse generators feature independent frequency and duty-cycle adjustment - EDN
Results page 2, about 'pwm'. Searching circuits at Next.gr
PWM (pulse Width Modulation) Power LED Dimmer : 7 Steps (with Pictures) - Instructables
nand - More Fun with the CD4093 IC as Schmitt Trigger Oscillator. Any practical difference between circuit version with "Enable" pin and Without? - Electrical Engineering Stack Exchange
Simple beeper circuit using oscillator CD 4093
Results page 2, about 'pwm'. Searching circuits at Next.gr
Square Wave Generator Circuit using 4047 IC
Index 2 - Pulse Signal Generator - Signal Processing - Circuit Diagram - SeekIC.com