Patent ID: 9000835
Filing Date: 2015-04-07
Classification: G05F,H02M

Abstract:
1. A power rectifier stage for a Radio Frequency Identification (RFID) integrated circuit (IC), the rectifier stage comprising: a first rectifying element coupled to a first phase of a radio frequency (RF) waveform; a pump node coupled to a second phase of the RF waveform and the first rectifying element; a second rectifying element coupled to the first phase of the RF waveform and the pump node; and a first biasing element coupled to the pump node and having a plurality of terminal voltages, wherein: the first rectifying element, the pump node, and the second rectifying element form a first current path; and every terminal voltage of the first biasing element varies with a phase and amplitude similar to a phase and amplitude of the second phase of the RF waveform.