Analog PWM generator design circuit diagram: 5V 500kHz PWM output

　　describe

　　This verification design uses a triangle wave generator and a comparator to generate a pulse width modulation (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. The operational amplifier and comparator generate the triangle waveform, which is then passed to one input of the comparator. By passing the input voltage to the other comparator input, a PWM waveform is generated. Negative feedback of the PWM waveform to the error amplifier is used to ensure high accuracy and linearity of the output. This design is built using the OPA2365 operational amplifier, TLV3502 comparator, and REF3325 reference.

　　characteristic

　　Generate PWM waveform using triangle wave generator and comparator

　　Single supply solution

　　-2V to 2V input, DC coupled

　　5V, 500kHz PWM output

　　0.22% measured gain error

　　0.108% measurement bias error

　　Schematic/Block Diagram