A Low Power Analog Baseband Circuit of Transmitter for Wireless Body Area Network
碩士 === 國立交通大學 === 電子研究所 === 100 === The thesis presents a solution of the low power analog baseband circuit of transmitter for wireless body area network which could convert the input digital signal into analog output so as to provide transmission of RF circuit. In order to achieve low power consump...
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| Format: | Others |
| Language: | en_US |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/57342995447262248068 |
| Summary: | 碩士 === 國立交通大學 === 電子研究所 === 100 === The thesis presents a solution of the low power analog baseband circuit of transmitter for wireless body area network which could convert the input digital signal into analog output so as to provide transmission of RF circuit.
In order to achieve low power consumption, switched-capacitor architecture is applied to perform digital-to-analog converter. In general case, the limited bandwidth of operational amplifier restricts the operating speed of this architecture. Using additional switches connected to the buffer controlled by additional clock phase to form return-to-zero architecture are proposed to resolve this problem. And the sort of the capacitor network reduces the routing parasitic capacitance so as to avoid a considerable influence on the ratio of capacitances. After subsequent reconstruction filter, the quantization noise and image frequency are decreased. The sampling frequency can operate to 20MHz/s with 10-bits resolution. The SFDR is 72dB at 5.01MHz. The total power consumption is 1.97mW.
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