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A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD
นักวิจัย : Yu, Jun , Tan, Meng Tong , Goh, Wang Ling , Cox, Stephen Michael
คำค้น : DRNTU::Engineering::Electrical and electronic engineering.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Yu, J., Tan, M. T., Goh, W. L., & Cox, S. M. (2011). A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD. IEEE transactions on circuits and systems II : express briefs, 59(1), 35 - 39. , http://hdl.handle.net/10220/11468 , http://dx.doi.org/10.1109/TCSII.2011.2173973
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : IEEE transactions on circuits and systems II : express briefs
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The advancement of power MOSFET fabrication technology has aided the reduction of power stage errors in class-D amplifiers (amps). This reduction reveals intrinsic distortion, which is a key performance limiter in modern pulsewidth-modulation (PWM)-based class-D amps. In this brief, a dual-feedforward carrier modulation topology is proposed to reduce the intrinsic harmonic distortion of a second-order loop filter class-D amp. The proposed design achieves a total harmonic distortion of less than 0.01% for input frequency up to 6 kHz, and it has an idle carrier frequency of 310 kHz. Such low carrier frequency is particularly important in high-power devices as it guarantees low switching loss. Moreover, the carrier frequency varies in a narrow range in the presence of an input signal and helps to suppress the audible intermodulation distortion in multichannel applications. The prototype circuit is implemented and tested on a printed circuit board using discrete components.

บรรณานุกรม :
Yu, Jun , Tan, Meng Tong , Goh, Wang Ling , Cox, Stephen Michael . (2554). A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yu, Jun , Tan, Meng Tong , Goh, Wang Ling , Cox, Stephen Michael . 2554. "A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yu, Jun , Tan, Meng Tong , Goh, Wang Ling , Cox, Stephen Michael . "A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Yu, Jun , Tan, Meng Tong , Goh, Wang Ling , Cox, Stephen Michael . A dual-feedforward carrier-modulated second-order class-D amplifier with improved THD. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.