Delay Equalization in Color Television

A Geometric Approach to Group Delay Network Synthesis

“…This synthesized network may then either be inserted in a system stand-alone to perform an analog signal processing function, or cascaded with an existing network to reduce the group delay variation of the resulting combined system. This approach is compatible with several existing techniques [1], [6][7][8][9][10][11][12] for the synthesis of group delay networks.…”

“…9,  l1 = 1.256 × 10 10 rad/s and by using (12) and (13) it is found that  m1 = 1.618 × 10 10 rad/s with β c1 = 0.9553 rad. Then (10), (11) and (14) are used to calculate β 1 = 0.4286 rad. The initial starting location for p 1 is therefore (- 1 ,  1 ) = (0.994, 17.790) × 10 9 .…”

“…Initial methods for synthesizing continuous group delay functions (using analog all-pass networks) were aimed at reducing the group delay variation of color television receivers [11]. These methods typically assume the form of design tables and graphs, as well as trial and error design approaches and are therefore limited to particular applications.…”