Wireless Bio-Medical Integrated Chip
Date Issued
2006
Date
2006
Author(s)
Tseng, Chih-Wei
DOI
en-US
Abstract
This thesis presents the design and implements the integrated chip for wireless bio-medical applications in TSMC 0.35um CMOS process. This circuit is composed of many sub-circuits including three of my design and three of my lab members’ design. I design an instrumentation amplifier for bio-signal amplify, a successive approximation ADC for digitized data requirement, and a regulator for various DC bias need in the integrated circuit. I integrate a Micro-control unit for integrated circuit state management and RF interface for command receiving and digitized bio-medical data transmission.
The instrumentation amplifier is composed of three OP-amps and controlled the voltage gain by a variable resistance. The 8-bit successive approximation ADC is base on binary search algorithm. This topology of ADC provides medium resolution, medium transfer speed, and low power consumption which is very suitable for our requirement. The regulator including a temperature-indepentdent reference voltage circuit provides the stable DC voltage through negative feedback. The input power supply is 3.7 volt and the output power supply is a 1.2 to 3.4 tunable voltage.
Besides three of my design circuits, I integrate three circuits which are designed by my lab members. The ASK transmitter is composed of a ring oscillator for 433MHz carrier generation and a C-class power amplifier for data transmission. The self mixing topology OOK receiver achieves the die area saving and simple architecture requirements. The Micro-control unit decodes the commands and manages the integrated circuit operation state including idle, transfer, convert, and continuous four states. The total die area is 1.5*1.2 mm2.
Subjects
無線生醫
wireless bio-medical
Type
thesis
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