A CMOS power amplifier using split input and output transformers to minimize its chip area

Jeong, Hayeon; Ko, Gayeon; Shin, Hojin; Kang, Inseong; Yoo, Jinho; Park, Changkun

doi:10.1002/mop.29829

Cited by 2 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given that a virtual AC ground can be easily obtained in the differential structure, the differential structure is very popular in the design of the CMOS power amplifiers; a schematic is provided in Fig. 1(b) [19,20]. Because of the virtual AC ground in the differential structure, the gain reduction problems induced by the bond-wires can be easily solved in CMOS power amplifiers.…”

Section: Introductionmentioning

confidence: 99%

A Cmos Power Amplifier Using a Balun Embedded Driver Stage for Ieee 802.11N Wlan Applications

Son¹,

Yoo²,

Lee³

et al. 2019

PIER C

Self Cite

View full text Add to dashboard Cite

In this work, we propose a balun embedded driver stage to enhance the bandwidth and minimize the chip size of a differential CMOS power amplifier. By removing the passive input transformer, the bandwidth and chip size are improved. The proposed driver stage acts as an input balun as well as the driver stage for the power stage. The proposed driver is composed of a cascade connected PMOS, an inductor, and NMOS to generate the differential output signal. For the function of the input balun, the gate of the PMOS is connected to the drain of the NMOS. To verify the feasibility of the proposed balun embedded driver stage, we design a differential CMOS power amplifier for 5-GHz IEEE 802.11n WLAN applications. The designed power amplifier is fabricated using the 180-nm SOI RF CMOS process. The measured 3-dB bandwidth is approximately 2.5 GHz. The chip size of the fully integrated power amplifier, including input and output matching networks and test pads, is 0.885 mm 2. The measured maximum output power is 20.18 dBm with a PAE of 10.16%.

show abstract

Section: Introductionmentioning

confidence: 99%

A Cmos Power Amplifier Using a Balun Embedded Driver Stage for Ieee 802.11N Wlan Applications

Son¹,

Yoo²,

Lee³

et al. 2019

PIER C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, the internet of things (IoT) has rapidly developed in the field of wireless communications [1,2]. Therefore, RF systems with a compact chip size and a low unit cost have received considerable attention [3][4][5]. However, because most power amplifiers essential in RF systems are designed using the HBT process for mobile and sensor applications, these power amplifiers cannot be integrated with other RF ICs or with analog or digital ICs.…”

Section: Introductionmentioning

confidence: 99%

A Cmos Power Amplifier Using an Asymmetrical Input Transformer to Enhance the Gain for Ieee 802.11N Wlan Applications

Sim¹,

Yoo²,

Lee³

et al. 2019

PIER M

Self Cite

View full text Add to dashboard Cite

In this study, we propose an asymmetrical input transformer for the input baluns in a differential RF CMOS power amplifier to minimize the loss induced by the input transformer. To reduce the loss caused by the magnetic coupling between the primary and secondary parts of a typical transformer, we modify the interconnection between the input transformer and the differential input of the driver stage. Unlike a typical transformer, the primary and secondary parts of the proposed transformer are directly connected to the input of the driver stage. As a result, the input signal in the primary part can reach one of the inputs of the differential driver stage, thereby reducing the loss caused by magnetic coupling. To verify the functionality of the proposed asymmetrical input transformer, we designed a 4.5-GHz differential CMOS power amplifier for IEEE 802.11n WLAN applications with 64-QAM, 9.6 dB PAPR, and a bandwidth of 20 MHz. The designed power amplifier is fabricated using the 180-nm SOI RF CMOS process. The measured maximum linear output power is 17.59 dBm with a gain of 29.23 dB.

show abstract

A CMOS power amplifier using split input and output transformers to minimize its chip area

Cited by 2 publications

References 16 publications

A Cmos Power Amplifier Using a Balun Embedded Driver Stage for Ieee 802.11N Wlan Applications

A Cmos Power Amplifier Using a Balun Embedded Driver Stage for Ieee 802.11N Wlan Applications

A Cmos Power Amplifier Using an Asymmetrical Input Transformer to Enhance the Gain for Ieee 802.11N Wlan Applications

Contact Info

Product

Resources

About