PL445766A1 - Harvester with RFID modulator - Google Patents

Abstract

The harvester with an RFID modulator has two input terminals (RF1, RF2) and two output terminals (HRV, GND). The harvester contains at least two stages (S1, S2, S3), where a single stage (S2) contains two capacitors (C1, C2) and two transistors (T1, T2), where the first capacitor (C1) is connected to the first input terminal ( RF1) and the second capacitor (C2) is connected to the second input terminal (RF2). The transistors (T1, T2) are connected with drains and connected to the first capacitor (C1), with the first transistor (T1) connected as the source to the input of a given stage (S2), and the second transistor (T2) connected as its source to the second capacitor ( C2) and to the output of the given stage (S2). The gate of one of the transistors (T1) in at least one harvester stage (S2) is connected to the source of the second transistor (T2) in the same stage, while the gate and drain of the second transistor (T2) in this stage are connected to each other. In at least one harvester stage (S1), the gate of one of the transistors (Tw) is connected simultaneously to the second input terminal (RF2) through a modulating transistor (Tm) and to the source of the transistor (Tz) constituting a current source, while the gate and drain of the second transistor in at this stage (S1) are connected to each other. The gate of the transistor (Tz) implementing the current source is simultaneously connected to its drain of this transistor and to the output of one of the stages (S3) of the harvester, and the gate of the modulating transistor (Tm) is connected to the modulation input of the system (M).