Performances of SOI CMOS OTAcombining ZTC and gain-boosting techniques

A folded-cascode CMOS FD SOI OTA with a gain-boosting stage has been designed using the ZTC concept. The measured room-temperature 115 dB DC gain for a 113 MHz transition frequency outperforms all previous SOI or bulk opamp performances. High-temperature measurements up to 400°C are reported for the first time.