A Programmed Telemetry Method For Implantable Devices

As electronic technology has developed and surgery skill has raised continuously, implantable electronic devices has become one of the fastest growing bio-medical technology branches. Implantable electronic devices can be used to replace the damaged human organs, which can also be used to detect the physiological and biochemical parameters of long-term change in human body. By using external programming technology, the physician can change the performance of the device noninvasively in order to adapt to changes in its operating conditions over the device’s lifetime.A typical implantable electronic device is usually equipped with a battery as energy supplier to maintain a long working life. When the implantable device operates at telemetry mode, it functions as the transmitter and consumes much energy leading to its working life decreasing. I have finished a great deal of basis research works about the programming and telemetry system of implantable devices. My thesis’s target is designing a new kind of transmit and receive circuit, which would reduce the power consuming during the telemetry procedure and prolong the working life of the implantable device.Chapter 1 provides the background and development history of the implantable electronic devices. Chapter 2 explains the theory of programming and telemetry system and provides the "bit-by-bit" telemetry mechanism. Chapter 3 explains the design procedure of the interface circuit between the external programmer and the implanted device. In order to test of the new telemetry mechanism, we have established a system platform by using FPGA and PC in Chapter 4. With the prototype, we have done many programming and telemetry operation and the experiment results proofs the feasibility of the "bit-by-bit" telemetry mechanism.