Single-chip inverter for active filters

Generally inverter-based active filters, which employ pulse-width-modulated (PWM) techniques, use microprocessors for overall control and discrete logic for the generation of switching patterns. Because of the complexity of control required, discrete logic circuits tend to have a very high component count, making system design inflexible, expensive and less reliable than integrated circuit implementation. The work reported here presents a novel design of a single-chip controlled PWM inverter-based active filter, which addresses these issues