  We present inflationary models of the early universe in the braneworld
scenario considering both scalar field and tachyon field separately. The
technique of Chervon and Zhuravlev to obtain inflationary cosmological models
without restrictions on a scalar field potential is employed here. We note that
like scalar field, the inflationary solution obtained here with tachyon field
also does not depend on its potential. However, unlike scalar field, inflation
with tachyon is obtained for a restricted domains of the field to begin with.
We obtain potentials for which one gets inflation using both scalar field and
tachyon field separately. It is found that unlike the scalar field, the
tachyonic field inflation sceanario can be realized from t > t_o.
