13.56 MHz Triple Mode Rectifier Circuit With Extended Coupling Range for Wirelessly Powered Implantable Medical Devices

Demystifying Regulating Active Rectifiers for Energy Harvesting Systems: A Tutorial Assisted by Verilog-A Models

“…Indeed, these comparators are placed outside of the 1X/0X feedback control loop, being them a part of the forward chain. Furthermore, they are usually implemented by using Common-Gate Comparators (CGCs) as in [30], [31], [32], [35], and [36], Their output are compared with ground level by means of COMP1(2),B and feed into an OR-gate together with the output of COMP,C. Indeed, when V COMP,C OR V COMP1(2),B are high V G1 (2) goes high too, also if V G2 (1) is high in the same half-period.…”

“…[18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32]. Battery charging via WPT is an attractive solution because it can deliver a wide range of power and helps the devices to be water-/dust-proof.…”

“…Battery charging via WPT is an attractive solution because it can deliver a wide range of power and helps the devices to be water-/dust-proof. Moreover, WPT enables battery-less IMDs, thus avoiding the toxicity of wires, reducing the implant dimensions, and increasing the longterm operation of the device [1], [2], [3], [4], [6], [8], [9], [10], [11], [16], [17], [20], [21], [25], [29], [30], [31], [32].…”

“…WPT is mainly implemented using inductive transfer [4], [5], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [22], [23], [24], [26], [28], [29], [31], [33], [34], [35], [36], [37], [38], [39], [40], [41] and, more recently, ultrasound waves [1], [3], [30], [32], [42]. Furthermore, also microwave radiation WPT can provide very high efficiency and a wide propagation area when used in open air and is widely adopted for RFID.…”

A High-Efficiency Triple-Mode Active Rectifier With Gate Charge Recycling Technique for Wireless Power Transfer System

“…Consequently, in strongly connected WPT systems, this causes the primary-side inverter to operate in hard switching, which leads to lower efficiency and increases the risk of circuit failure. An impedance control network (ICN) resonant converter uses two inverters and can lower the step-down burden on its transformer by a factor of two due to the stacking operation of its inverters [20]- [23].…”