This paper presents analytical expressions for channel noise, induced gate noise (IGN), and cross-correlation noise in a long-channel junctionless (JL) double-gate MOSFET. The analytical relationships, which have been derived from a coherent charge-based model, are validated with technology computer-aided design simulations, and the figures of merit have been compared with the inversion mode FETs. For a given current, we found that the channel thermal noise is very similar for both architectures, whereas the IGN is slightly decreased in the JL FETs.