一种低关断功耗的地端关断整流器

基于TSMC 180 nm CMOS工艺,设计了一种采用负压关断的地端关断整流器。将关断时的控制电平从0降到负值,降低了使能管的亚阈值电流。将使能管的工作状态从亚阈值区变为截止区,进一步降低了关断功耗。仿真结果表明,当整流器使能时,该负压地端关断整流器的导通性能与传统地端关断整流器几乎相当。当整流器关断且输入电压幅值为1 V时,关断功耗为-24.0 dBm @953 MHz,与传统地端关断整流器相比,下降了7.5 dBm；与传统短路关断整流器相比,降低了23 dBm,功率转换效率提高了1.9 %。该地端关断整流器能满足射频能量收集系统中整流器低功耗待机的要求。

A Ground-Switched Rectifier with Low Turn-Off Power

Based on the TSMC 180 nm CMOS process, a ground-switched rectifier with negative voltage was designed. The turn-off control level was reduced from 0 to a negative value, which reduced the sub-threshold current of the enable tube or changed the operating state of the enable tube from the sub-threshold region to the cut-off region. As a result, the turn-off power consumption was further reduced. The simulation results showed that, when the rectifier was enabled, the performance of the proposed ground-switched rectifier with negative voltage was almost the same as the performance of the traditional ground-switched rectifier. When the rectifier was turned off and the input voltage amplitude was 1 V, the turn-off power consumption of the proposed ground-switched rectifier was -24.0 dBm @953 MHz, which was 7.5 dBm lower than the traditional ground-switched rectifier, and 23 dBm lower than the traditional short-circuit turn-off rectifier. The power conversion efficiency was increased by 1.9 % at the same time. The results met low power standby requirements for rectifiers in RF energy harvesting systems.