Transmitters, sensor systems, and methods of transmission include a frequency adjuster coupled to a ring oscillator to reduce latency and power consumption and to receive a signal from the ring oscillator. The frequency adjuster includes logic circuits to adjust the signal to a selected transmission frequency band. A band switch is coupled to the ring oscillator and the frequency adjuster to select logic circuits within the frequency adjuster to determine the selected transmission frequency band from a set of output frequency bands. A first radio front end is coupled to the frequency adjuster to transmit the signal on the selected transmission frequency band.