一、引言几年来,业已研制了有组件式结构的,测量多变量的多频道微功耗生物医学遥测系统,用于作为对生殖系统及避孕进行生物医学工程研究的一部分。装配成:包括能区别输入传感量的副载波振荡器,及载波振荡器在内的小型组件;最后可选择合适的组件插到总接线板上;并根据特定的实验要求进行封装。文献介绍的可植入发射机,一般要求在单个组合系统中装有一个或几个副载波振荡器(SCO),及一个载波振荡器。但在此系统中,由于元件损坏要更换副载波电路,或必须改变载波频率时,均感不便。而且,设计是针对某一特定的生物学变量进行的,故实用灵活性不大。换一个参量,则需 I. INTRODUCTION In the past few years, a multi-channel micro-power biomedical telemetry system with a modular structure for measuring multivariate has been developed for use as part of a biomedical engineering study on the reproductive system and contraception. Assembled to include a sub-carrier oscillator capable of distinguishing input sensing and a small component such as a carrier oscillator; Finally, the appropriate components can be inserted into the main board and packaged according to specific experimental requirements. The literature describes implantable transmitters that typically require one or several sub-carrier oscillators (SCOs) and a carrier oscillator to be mounted in a single combined system. However, in this system, it is inconvenient to change subcarrier circuits due to component damage or to change the carrier frequency. Moreover, the design is for a particular biological variable, so practical flexibility is not. For a parameter, you need