This paper introduces a resolver decoding circuit based on the position detection of a step-stare panoramic imaging platform. Through the use of AD2S1210(revolving transformer/digital converting IC produced by ADI), to decode the resolver J78XFS009, a decoding circuit is designed. The design includes the basic working of ADS2S1210, the interface circuit and the connecting circuit between the micro-controller and resolver and so on. The whole circuit has the advantages of simple structure, high reliability, ...