Degenerated passive mixer in saw-less receiver

Details Degenerated passive mixer in saw-less receiver Degenerated passive mixer in saw-less receiver

2011-03-01

2011-03-01

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

C455S334000, C455S550100

Reexamination Certificate

active

07899426

ABSTRACT:
In a SAW-less receiver involving a passive mixer, novel degenerative impedance elements having substantial impedances are disposed in incoming signal paths between the differential signal output leads of a low-noise amplifier (LNA) and the differential signal input leads of the passive mixer. The passive mixer outputs signals to a transimpedance amplifier and baseband filter (TIA). Providing the novel degenerative impedance elements decreases noise in the overall receiver as output from the TIA, with only minimal degradation of other receiver performance characteristics. In some examples, the passive mixer receives local oscillator signals having duty cycles of substantially less than fifty percent. In some examples, the degenerative impedance elements can have one of several impedances.

REFERENCES:
patent: 7457605 (2008-11-01), Thompson et al.
patent: 7460844 (2008-12-01), Molnar et al.
patent: 7468629 (2008-12-01), Chien
patent: 2009/0239592 (2009-09-01), Deng et al.
patent: 2009/0252252 (2009-10-01), Kim et al.
patent: 2010/0029323 (2010-02-01), Tasic et al.
Bagheri, Rahim, “An 800-Mhz-6-Ghz Software-Defined Wireless Receiver in 90-nm CMOS,” IEEE Journal of Solid-State Circuits, vol. 41, No. 12, Dec. 2006.
Wan, Jiansong, “Tunable Bandpass (1.7-6)GHz Polyphase Filter in Near Zero IF Receiver, ” Philips, July 2007.
Zhu, Yide, “Harmonic Rejection Mixer for Digital Video Broadcase—Handheld,” Thesis, Delft University of Technology, Jun. 2007.
Nguyen et al., “A Low-Power RF Direct-Conversion Receiver/Transmitter for 2.4-GHz-Band IEEE 802.15.4 Standard in 0.18-μm CMOS Technology,” vol. 54, No. 12, Dec. 2006, pp. 4062-4071.
Circa et al., “Resistive MOSFET mixer for mobile direct conversion receivers, XP010687639 ISBN: 978-0-7803-7824-7, ”Microwave and Optoelectronics Conference, Proceedings of the SBMO/IEEE MTT-S International, Piscataway, NJ, USA, IEEE, US, 2003, 3, 59-64.
Kim et al., “A resistively degenerated wide-band passive mixer with low noise figure and +60dBm IIP2 in 0.18βm CMOS, 2008 RFIC 2008, IEEE Piscataway, NJ, US, ISBN: 978-1-4244-1808-4, ”Radio Frequency Integrated Circuits Symposium, 2008, 185-188.
Razavi et al., “Multiband UMB transceivers,” Proceedings of the IEEE 2005, IEEE, Piscataway, NJ, USA, XP010873764 ISBN: 978-0-7803-9023-2 he whole document, Custom Integrated Circuits Conference, 2005, 140-148.
International Search Report and Written Opinion-PCT/US08/081652, International Searching Authority-European Patent Office, Apr. 2, 2009.

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