| Citation: |
Han Shuguang, Chi Baoyong, Wang Zhihua. A 2.4GHz Low Power ASK Transmitter for Wireless Capsule Endoscope Applications[J]. Journal of Semiconductors, 2006, 27(6): 988-993.
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Han S G, Chi B Y, Wang Z H. A 2.4GHz Low Power ASK Transmitter for Wireless Capsule Endoscope Applications[J]. Chin. J. Semicond., 2006, 27(6): 988.
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A 2.4GHz Low Power ASK Transmitter for Wireless Capsule Endoscope Applications
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Abstract
A 2.4GHz ASK transmitter suitable for a low power wireless capsule endoscope system is presented.A mixer-based frequency up-conversion transmitter architecture is employed to achieve a high data rate.A pseudo-differential stacked class-A power amplifier using the current reuse technique is proposed to save power.The transmitter mainly includes two parts:a 20MHz ASK modulator based on a constant amplitude phase lock loop (PLL) and a direct up-conversion RF circuit.This design,implemented in a TSMC 0.25μm CMOS process,achieves a -23.217dBm output power with a data rate of 1Mbps and dissipates 3.17mA of current with a single 2.5V power supply.-
Keywords:
- wireless capsule endoscope,
- amplitude shift keying,
- PLL,
- transmitter,
- CMOS
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References
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Proportional views
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