Please provide the small signal transfer function for the topswitch and error amplifier when using the “true” type 3 compensator with topswitch. We unfortunately cannot afford the £90 to buy Basso’s book which contains this needed equation.

As you know, the  “true” type 3 feedback circuit, excellent for voltage mode controllers such as topswitch. (“true” type 3 is explained on page 471 of Basso book “Designing control loops for linear & switching power supplies”.)