Patent ID: 8344761

Claim:
A 3-level line driver, comprising: a wave generator configured to generate a repetitive wave; a first integrator configured to receive an input signal, the first integrator further configured to integrate the input signal; a second integrator configured to receive a complement signal of the input signal, the second integrator further configured to integrate the complement to the input signal; a first comparator coupled to the first integrator and to the wave generator, the first comparator configured to compare the integrated input signal with the generated wave, the first comparator providing a first naturally sampled PWM signal based on the comparison; a second comparator coupled to the second integrator and to the wave generator, the second comparator configured to compare the integrated complement of the input signal with the generated wave, the second comparator providing a second naturally sampled PWM signal based on the comparison; a combiner configured to combine the first naturally sampled PWM signal and the second naturally sampled PWM signal to derive a feedback signal to be provided to the first integrator and the second integrator; and a filter configured to filter the feedback signal, the filter configured as at least one of the following: a 0 th -order filter and an even order filter.