Design Of A Shunt Regulator For Wireless Power Transmission

As the science and technology develop rapidly, ICs for medical electronics and portable consumer ICs earn a large share of IC market nowadays, in which wireless power transmission(WPT) has become a popular aspect. In terms of portable consumer electronics products, hardware is updating sharply in smart-phones and MIDs, which requires a higher performance of power supply. Also people don t want to be limited by the charging cable so that wireless charging becomes a new aspect for portable products. On the other hand, biomedical implanted devices have been widely used in clinical treatments, which also require a stable power supply. WPT can enhance the life and reliability of the implanted devices. Shunt regulator can be used in a WPT system. A well designed shunt regulator can save the power consumption of the system and enhance the system stability. Meanwhile discrete regulators will enlarge the system size and cost. This design is based on a biomedical implanted wireless-system which is under development and mainly focusing on the wireless power transmission function. The design is an output adjustable shunt regulator using the high-voltage CMOS process and can be integrated in an implanted chip. With the internal band-gap reference the design can achieve a high precision output, low power consumption and good temperature co-efficient. The designed circuit and layout can meet the design specifications.