A new linearization technique for CMOS RF mixer using third-order transconductance cancellation

Kung Hao Liang; Chi Hsein Lin; Hong Yeh Chang; Yi Jen Chan

doi:10.1109/LMWC.2008.922129

A new linearization technique for CMOS RF mixer using third-order transconductance cancellation

Kung Hao Liang, Chi Hsein Lin, Hong Yeh Chang, Yi Jen Chan

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

A new third-order transconductance (g_m3) cancellation technique is proposed and applied to a conventional radio frequency (RF) mixer for improving circuit linearity. The bulk-to-source voltage is applied to adjust the peak value position of g_m3. The cancellation of g_m3 is utilized by a negative peak g_m3 transistor combined in parallel with a positive peak g_m3 transistor. For a single device, the measured adjacent channel power ratio (ACPR) and third-order intermodulation (IMD3) distortion are both improved over 15 dB. A Gilbert-cell mixer in commercial 0.18-μ m CMOS process was designed using the proposed method to further evaluate the linearity. The compensated g_m3 device is placed in the input RF gm-stage and then reducing the principle nonlinearity source of the mixer. From the experiment results, the ACPR and IMD3 of the mixer are improved about 10 and 15 dB, respectively.

Original language	English
Article number	4497814
Pages (from-to)	350-352
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	18
Issue number	5
DOIs	https://doi.org/10.1109/LMWC.2008.922129
State	Published - May 2008

Keywords

CMOS
Harmonic
Intermodulation
Linearization
Mixer
Third-order intermodulation (IMD3)
Third-order transconductance

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10.1109/LMWC.2008.922129

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abstract = "A new third-order transconductance (gm3) cancellation technique is proposed and applied to a conventional radio frequency (RF) mixer for improving circuit linearity. The bulk-to-source voltage is applied to adjust the peak value position of gm3. The cancellation of gm3 is utilized by a negative peak gm3 transistor combined in parallel with a positive peak gm3 transistor. For a single device, the measured adjacent channel power ratio (ACPR) and third-order intermodulation (IMD3) distortion are both improved over 15 dB. A Gilbert-cell mixer in commercial 0.18-μ m CMOS process was designed using the proposed method to further evaluate the linearity. The compensated gm3 device is placed in the input RF gm-stage and then reducing the principle nonlinearity source of the mixer. From the experiment results, the ACPR and IMD3 of the mixer are improved about 10 and 15 dB, respectively.",

keywords = "CMOS, Harmonic, Intermodulation, Linearization, Mixer, Third-order intermodulation (IMD3), Third-order transconductance",

author = "Liang, {Kung Hao} and Lin, {Chi Hsein} and Chang, {Hong Yeh} and Chan, {Yi Jen}",

note = "Funding Information: Manuscript received October 1, 2007; revised January 29, 2008. This work was supported in part by the National Science Council of Taiwan, R.O.C., under Grants NSC 96-2221-E-008-117-MY3, NSC 96–2221–E-008–119–MY3, and NSC 96-2628-E-008-073-MY3 and by the Taiwan Semiconductor Manufacturing Company through the Chip Implementation Center (CIC) of Taiwan.",

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AU - Liang, Kung Hao

AU - Lin, Chi Hsein

AU - Chang, Hong Yeh

AU - Chan, Yi Jen

N1 - Funding Information: Manuscript received October 1, 2007; revised January 29, 2008. This work was supported in part by the National Science Council of Taiwan, R.O.C., under Grants NSC 96-2221-E-008-117-MY3, NSC 96–2221–E-008–119–MY3, and NSC 96-2628-E-008-073-MY3 and by the Taiwan Semiconductor Manufacturing Company through the Chip Implementation Center (CIC) of Taiwan.

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N2 - A new third-order transconductance (gm3) cancellation technique is proposed and applied to a conventional radio frequency (RF) mixer for improving circuit linearity. The bulk-to-source voltage is applied to adjust the peak value position of gm3. The cancellation of gm3 is utilized by a negative peak gm3 transistor combined in parallel with a positive peak gm3 transistor. For a single device, the measured adjacent channel power ratio (ACPR) and third-order intermodulation (IMD3) distortion are both improved over 15 dB. A Gilbert-cell mixer in commercial 0.18-μ m CMOS process was designed using the proposed method to further evaluate the linearity. The compensated gm3 device is placed in the input RF gm-stage and then reducing the principle nonlinearity source of the mixer. From the experiment results, the ACPR and IMD3 of the mixer are improved about 10 and 15 dB, respectively.

AB - A new third-order transconductance (gm3) cancellation technique is proposed and applied to a conventional radio frequency (RF) mixer for improving circuit linearity. The bulk-to-source voltage is applied to adjust the peak value position of gm3. The cancellation of gm3 is utilized by a negative peak gm3 transistor combined in parallel with a positive peak gm3 transistor. For a single device, the measured adjacent channel power ratio (ACPR) and third-order intermodulation (IMD3) distortion are both improved over 15 dB. A Gilbert-cell mixer in commercial 0.18-μ m CMOS process was designed using the proposed method to further evaluate the linearity. The compensated gm3 device is placed in the input RF gm-stage and then reducing the principle nonlinearity source of the mixer. From the experiment results, the ACPR and IMD3 of the mixer are improved about 10 and 15 dB, respectively.

KW - CMOS

KW - Harmonic

KW - Intermodulation

KW - Linearization

KW - Mixer

KW - Third-order intermodulation (IMD3)

KW - Third-order transconductance

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A new linearization technique for CMOS RF mixer using third-order transconductance cancellation

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