  In this paper we study dynamical chiral symmetry breaking of a generic
quantum field theoretical model with global chiral flavor symmetry. By purely
algebraic means we analyze the vacuum structure for different symmetry breaking
schemes and show explicitly how the ensuing non-trivial flavor vacuum
condensate characterizes the phenomenon of field mixing. In addition, with the
help of Ward-Takahashi identities we demonstrate the emergence of a correct
number of Nambu-Goldstone modes in the physical spectrum.
