An improved calculation method of inductance and capacitances in ?1 circuits for resonant power amplifiers

• Autorzy: Modzelewski J. , Kulma K.
• Języki publikacji: EN

Abstrakty

EN

In the paper an improved method of calculation of the inductance and capacitances in the ?1 circuit for Class A, AB, B, and C resonant power amplifiers is presented. This method is based on an assumption that the quality factor of the inductor is inite and the capacitors are lossless. The input parameters for calculations are the amplifier load resistance, the transistor load resistance, the quality factor of the inductor, the loaded quality factor of the designed circuit, and the operating frequency. The presented method allows reducing the required regulation range of ?1 circuits elements In built resonant amplifiers as compared to the traditional calculation methods assuming lossless capacitors and inductor. This advantage is important, in particular, for long- and medium-wave transistor power amplifiers, where capacitances in ?1 circuits are high comparing to typical trimming capacitors.

Słowa kluczowe

EN

resonant-circuit design; impedance transformation; inductor quality factor; loaded quality factor; Class A; class AB; class B; class C

PL

induktorowy współcynnik jakości; klasa A; klasa AB; klasa B; klasa C

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2012
• Tom: Vol. 61, nr 2
• Strony: 221--237
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Modzelewski J.

autor

Kulma K.

• Institute of Radioelectronics, Faculty of Electronics and Information Technology Warsaw University of Technology,

Bibliografia

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• [7] Orfanidis S.J., Electromagnetic Waves and antennas. Rutgers University, www.ece.rutgers.edu/ ~orfanidi/ewa.
• [8] Modzelewski J., Simplified design method of π1 circuits for tuned power amplifiers. Electrical Review 11: 167-170 (2009), (in Polish).
• [9] Modzelewski J., Properties of π1 circuits for tuned power amplifiers as function of the loaded quality factor. Electronics, Constructions, Technologies, Applications 2: 17-23 (2010) (in Polish).
• [10] Modzelewski J., A1 resonant circuits with low loaded quality factor in tuned power amplifiers. Electrical Review 11a: 200-203 (2010) (in Polish).
• [11] Kulma K., Improved method of π1-circuit design for resonant power amplifiers, master’s thesis. Institute of Radioelectronics, Warsaw University of Technology, Warsaw (2011) (in Polish).
• [12] Hejhall R., Systemizing of RF power amplifier design. Motorola Semiconductor Application Note AN282A.