Design, analysis and implementation of class-E ZCS/ZCDS power amplifier for any duty ratio with nonlinear output parasitic capacitance

Design of class‐E M amplifier with consideration of parasitic non‐linear capacitances and on‐state resistance

“…Class‐D PA is used as an audio amplifier, it has high efficiency in comparison with the classic PA, but it has lower efficiency in comparison with switch‐mode PAs such as class‐E and class‐E M . Several studies have been performed on class‐E and E −1 PAs [3–12]. The class E PA has better efficiency [1] compared with other classes of PAs.…”

“…Parasitic parameters of MOSFET have been ignored in that design. A class‐E −1 PA with zero current switching (ZCS) and zero derivative current switching (ZDCS) conditions at the different duty ratio, considering the MOSFET non‐linear drain‐to‐source parasitic capacitance has been introduced in [5]. A sub‐nominal inverse class‐E PA with considering linear switch‐on resistor and output parasitic capacitor has been studied in [6] for different duty ratio and output phase shift.…”