This document discusses apparatus and methods for reducing energy consumption of digital-to-time converter (DTC) based transmitters. In an example, a wireless device can include a digital-to-time converter (DTC) configured to receive phase information from a baseband processor and to provide a first modulation signal for generating a wireless signal, and a detector configured to detect an operating condition of the wireless device and to adjust a parameter of the DTC in response to a change in the operating condition.