circlerad = 0.125 boxwid = 0.4; boxht = 0.3 arrow right "x(n)" "" "" FB: circle"+" big big line 3cm dot "w(n)" "" "" line; arrow Out: circle "+" big big arrow "y(n)" "" "" arrow from last dot down 0.5cm box "z^-1" arrow box "z^-1" dot at last arrow.center arrow from last box.s down 0.5cm then left 1.5cm circle line from last circle.sw to last circle.ne line from last circle.nw to last circle.se arrow <- from last circle.s down 0.5cm text "-1" arrow from last circle.w left until even with FB then up to FB.s arrow left 1.5cm from last dot circle line from last circle.sw to last circle.ne line from last circle.nw to last circle.se arrow <- from last circle.s down 0.5cm text "2*cos(2*pi*m/N)" arrow from last circle.w left 0.25cm then to FB.se arrow right 1.5cm from last dot circle line from last circle.sw to last circle.ne line from last circle.nw to last circle.se arrow from last circle.e right 0.25cm then to Out.s arrow <- from last circle.s down 0.5cm text "-e^(-j*2*pi*m/N)"