Efficiency of Current-Mode Class-D Amplifiers with Delta-Sigma Modulated Drive Signals

Brackle, A.; Heck, Stefan; Berroth, Manfred; Dettmann, I.

doi:10.1109/gemic.2009.4815901

Cited by 7 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The basic operation principle and efficiency analysis of the CMCD amplifier have been well described in previous literatures [8, 9]. Figure 3 shows the schematic diagram and its current and voltage waveform of the conventional CMCD amplifier.…”

Section: Passive Subcircuit Design For Cmcd Amplifiermentioning

confidence: 99%

“…Dual-band bandpass filters (BPFs) have been gaining wide attention in recent years as one of the most important circuit blocks in exploring advanced dual-band wireless systems [1][2][3][4][5][6][7][8][9][10]. In [1], a dual-band BPF was implemented by connecting a BPF and a bandstop filter.…”

Section: Introductionmentioning

confidence: 99%

“…Later, open-stub loaded resonator were introduced, the even mode could be tuned by adjusting the center-loaded stub while the odd mode was fixed, and dual-band filters with the band frequency ratio of the two bands smaller than 2 were designed [7,8]. The short-stub loaded resonators were also applied to the design of dual-band filters [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

GaN HEMT based high‐efficiency current‐mode class‐D amplifier using chip‐on‐board technique

Park

Yoo

Kang

et al. 2011

Micro & Optical Tech Letters

View full text Add to dashboard Cite

This article presents a high efficiency current-mode class-D (CMCD) amplifier using a GaN high electron mobility transistor (HEMT) for class-S system-a digitally controlled by deltasigma modulation. To enhance a drain efficiency of CMCD amplifier, the chip-on-board (COB) technique, which can reduce the external parasitic components of the packaged transistor and allow fast switching operation at high frequencies by minimizing distortion of the pulse waveform, is adopted. A LC-resonance circuit with adequate Q values between each transistor and output matching network controls harmonic signal by using the lumped elements to extract pure fundamental frequency of the output signal. For a high efficiency pushpull operation of CMCD amplifier, low-loss rat-race baluns are integrated at input and output circuits. From the measured results for a continuous wave of 3.35 GHz, the CMCD amplifier using COB technique shows a maximum output power of 35.88 dBm and a maximum power gain of about 10 dB. Also, the proposed CMCD amplifier provides a high power-added-efficiency (PAE) of 63.1% and a drain efficiency of 76.3% at maximum output power. The drain efficiency is still remained over 70% in the frequency range of 200 MHz.

show abstract

Section: Passive Subcircuit Design For Cmcd Amplifiermentioning

confidence: 99%