  Recently, evidence of stochastic gravitational wave background (SGWB) signals
observed by pulsar timing array (PTA) collaborations, has prompted
investigations into their origins. We explore the compatibility of a proposed
inflationary scenario, incorporating an intermediate null energy condition
(NEC)-violating phase, with the PTA observations. The NEC violation potentially
amplifies the primordial tensor power spectrum, offering a promising
explanation for PTA observations. Numerical analyses, primarily focused on
NANOGrav's 15-year results, reveal the model's compatibility with PTA data.
Notably, the model predicts a nearly scale-invariant GW spectrum in the mHz
frequency range, which sets our scenario apart from other interpretations
predicting a red primordial GW spectrum on smaller scales.
