【摘要】 实现了一个适用于无线内窥镜系统的低功耗ASK中频接收机电路.该接收机包括一个用于补偿信道衰减的自动增益控制环、一个ASK解调器和基于能隙基准源的偏置电路,接收机电路已采用0.25μm CMOS工艺实现.测试结果表明,该电路可以从功率在-30~10dBm之间的中频信号中正确解调出数字基带信号,中频工作频率为20MHz.电路采用2.5V电源,消耗的电流仅为2.1mA.更多还原

【Abstract】 This paper presents a low power ASK IF receiver for wireless endoscopy capsule systems.The receiver includes an AGC loop that compensates the channel attenuation,an ASK demodulator,and a band-gap based bias circuit.The IF-circuit was implemented in a 0.25μm CMOS process.Tests show that the IF receiver can correctly detect digital base-band signals from-30～10dBm IF signals with an IF operating frequency of 20MHz.The receiver draws about 2.1mA of current from a 2.5V power supply.更多还原