【摘要】 实现了一个适用于短距离无线系统的低功耗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和一个ASK检波器.自动增益控制环中采用了新型的限流跨导器和带前馈的差分峰值检测器,从而以较低的功耗实现了较高的压缩比及较快的响应速度.通过在峰值存储单元中引入零点及在峰值检测电路中引入前馈,实现了对自动增益控制环阻尼特性的调整.ASK检波器中传统的整流器和低通滤波器被整合为更紧凑的结构,从而进一步降低了功耗.仿真结果验证了本文所提技术的有效性.更多还原

【Abstract】 We report a low power ASK IF receiver for short-range wireless systems,which includes an AGC loop that compensates the channel attenuation and an ASK detector.A novel current-limited transconductor and feed-forward differential peak detector have been designed to maintain a high compression ratio and fast response for the AGC with lower power consumption.A storage unit with a zero and a feed-forward structure have been introduced into the peak detector to control the damping characteristic of the AGC loop.A rectifier and low-pass filter included in the ASK detector have been integrated into a more compact structure to further lower the power consumption.The simulation results show the feasibility of the proposed technique.更多还原