Varible PSU / Sine Generator

The project is to design and build a prototype PSU (Specification in the attached PDF). The power supply is to be AC output with varible frequancy and voltage. This is a low wattage supply (less than 10W). In your bid please provide the following: - Proposed "modules", proving information on how you percieve developing the solution - A size estimate (LxWxH) - A weight estimate - Any comments against the attached specification. Any furthur information that you require please contact me.