Title :
Design of class-DE amplifier with linear and nonlinear shunt capacitances for 25 % duty ratio
Author :
Sekiya, Hiroo ; Miyahara, Ryosuke ; Kazimierczuk, Marian K.
Author_Institution :
Grad. Sch. of Adv. Integration Sci., Chiba Univ., Chiba, Japan
Abstract :
The class-E ZVS/ZDS operation within the class-DE amplifier can be easily achieved by adding external shunt capacitances. This paper presents the analytical expressions for the design of the class-DE amplifier with the shunt capacitances composed of the linear and nonlinear capacitances for the switch-on duty ratio D=0.25. In the analysis, an equivalent linear shunt capacitance of nonlinear MOSFET output capacitance are defined and derived. The analytical results show good agreement with the experimental ones, which validates our analysis.
Keywords :
capacitance; power MOSFET; power amplifiers; zero voltage switching; class-DE power amplifier; class-E zero-derivative switching operation; class-E zero-voltage switching operation; equivalent linear shunt capacitance; nonlinear MOSFET output capacitance; Circuit topology; Frequency; High power amplifiers; MOSFET circuits; Operational amplifiers; Parasitic capacitance; Shunt (electrical); Switches; Switching circuits; Zero voltage switching; class-DE power amplifier; class-E ZVS/ZDS; equivalent linear capacitance; nonlinear MOSFET output capacitance;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118401
