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Low power upconversion mixer for medical remote sensing.

Lioe de X, Shafie S, Ramiah H, Tan GH - ScientificWorldJournal (2014)

Bottom Line: This work presents the design of a low power upconversion mixer adapted in medical remote sensing such as wireless endoscopy application.The proposed upconversion mixer operates in ISM band of 433 MHz.The design of the upconversion mixer is realized on CMOS 0.13 μm platform, with a current consumption of 594 μA at supply voltage headroom of 1.2 V.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

ABSTRACT
This work presents the design of a low power upconversion mixer adapted in medical remote sensing such as wireless endoscopy application. The proposed upconversion mixer operates in ISM band of 433 MHz. With the carrier power of -5 dBm, the proposed mixer has an output inferred 1 dB compression point of -0.5 dBm with a corresponding output third-order intercept point (OIP3) of 7.1 dBm. The design of the upconversion mixer is realized on CMOS 0.13 μm platform, with a current consumption of 594 μA at supply voltage headroom of 1.2 V.

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Related in: MedlinePlus

Proposed upconversion mixer.
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fig2: Proposed upconversion mixer.

Mentions: The switching pairs of the transconductance stage are turned on and off alternately. The principle of frequency translation is akin to double-balanced topology. The aspect ratio in the width of PMOS to the width of NMOS is twice in magnitude justifying different carrier mobility between PMOS and NMOS devices. At node 〈a〉 of Figure 2, for a positive half cycle of LO signal, M3 is switched off while M1 is switched on, resulting in the transconductor to be switched on. The reversed operation is observed at node 〈b〉. Push pull configuration of switching stage is adopted instead of single NMOS switch due to larger output swing and thus providing superior noise immunity.


Low power upconversion mixer for medical remote sensing.

Lioe de X, Shafie S, Ramiah H, Tan GH - ScientificWorldJournal (2014)

Proposed upconversion mixer.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4121102&req=5

fig2: Proposed upconversion mixer.
Mentions: The switching pairs of the transconductance stage are turned on and off alternately. The principle of frequency translation is akin to double-balanced topology. The aspect ratio in the width of PMOS to the width of NMOS is twice in magnitude justifying different carrier mobility between PMOS and NMOS devices. At node 〈a〉 of Figure 2, for a positive half cycle of LO signal, M3 is switched off while M1 is switched on, resulting in the transconductor to be switched on. The reversed operation is observed at node 〈b〉. Push pull configuration of switching stage is adopted instead of single NMOS switch due to larger output swing and thus providing superior noise immunity.

Bottom Line: This work presents the design of a low power upconversion mixer adapted in medical remote sensing such as wireless endoscopy application.The proposed upconversion mixer operates in ISM band of 433 MHz.The design of the upconversion mixer is realized on CMOS 0.13 μm platform, with a current consumption of 594 μA at supply voltage headroom of 1.2 V.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

ABSTRACT
This work presents the design of a low power upconversion mixer adapted in medical remote sensing such as wireless endoscopy application. The proposed upconversion mixer operates in ISM band of 433 MHz. With the carrier power of -5 dBm, the proposed mixer has an output inferred 1 dB compression point of -0.5 dBm with a corresponding output third-order intercept point (OIP3) of 7.1 dBm. The design of the upconversion mixer is realized on CMOS 0.13 μm platform, with a current consumption of 594 μA at supply voltage headroom of 1.2 V.

Show MeSH
Related in: MedlinePlus