This paper presents a designer centric analog syn- thesis flow that is fully controlled by the designer and offers an intuitive design approach. The designer knowledge to conceive an analog IP is the key element of the synthesis flow, it is taken into account to automatically generate the analog IP design procedure and physical view. Thus both consistency and accuracy of the final design are ensured. The presented design flow bridges the gap between the two traditional approaches related to analog design automation, namely the simulation-based and the knowledge- based approaches, to profit from both approach advantages. The designer centric analog synthesis flow is composed of an accurate sizing tool (section I) and a configurable layout generation tool (section II). Both tools are used to synthesize a fully differential transconductor.