Mixed signal BIST: fact or fiction

Is mixed-signal BIST a viable, general-purpose test solution? Many of today´s SoC devices embed complex analog and mixed-signal cores, and some in the industry have seen mixed-signal BIST as one of the most promising potential solutions. Nonetheless, mixed-signal BIST is far from a general-purpose solution and will remain an ad-hoc solution in the foreseeable future. But because of increasing demands on mixed-signal core testing and the drive to lower the cost of test, the use of mixed-signal BIST will grow, both as an alternative and supplement to traditional mixed signal test methods.