Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Reexamination Certificate
2011-07-05
2011-07-05
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
C327S063000, C327S560000, C330S252000, C455S333000
Reexamination Certificate
active
07973587
ABSTRACT:
A mixer having high linearity and an associated transconductor combining programmable gain amplifier and mixer functions are provided. The transconductor includes first and second resistors, a differential amplifier, first and second feedback circuits, and first and second transistors. A differential voltage signal is inputted to first and second input ends of the differential amplifier via the first and second resistors. The first and second feedback circuits are provided between a first output end and the first input end, and a second output end and the second input end of the differential amplifier, respectively. The first output end outputs a first output signal for controlling a first current passing through the first transistor. The second output end outputs a second output signal for controlling a second current passing through the second transistor. The first current and the second current determine a differential current.
REFERENCES:
patent: 2007/0200622 (2007-08-01), Filoramo et al.
Chinese Patent Office, Office Action dated Mar. 10, 2010 (17 pages).
Brenna, G. et al, “A 2-GHz Carrier leakage Calibrated Direct-conversion WCDMA Transmitter in 0.13-μm CMOS,” IEEE Journal of Solid-State Circuits, vol. 39, No. 8, Aug. 2004, pp. 1253-1262.
Vassiliou, I. et al., A Single-Chip digitally Calibrated 5.15-5.825-GHz 0.18-μm CMOS transceiver for 802.11a Wireless LAN, IEEE Journal of Solid-State Circuits, vol. 38, No. 12, Dec. 2003, pp. 2221-2231.
Simon, Martin et al., “An 802.11a/b/g RF Transceiver in an SoC,” 2007 IEEE International Solid-State Circuits Conference Digest of Technical Papers, Feb. 14, 2007, ISSCC 2007 Session 31/WLAN/Bluetooth/31.3, pp. 562-564.
Song, E. et al., “A 0.25-μm CMOS Quad-Band GSM RF Transceiver Using an Efficient LO Frequency Plan,” IEEE Journal of Solid-State Circuits, vol. 40, No. 5, May 2005, pp. 1094-1106.
Hsiao Shuo Yuan
Wang Fucheng
Yang Chao-Tung
Donovan Lincoln
Edell Shapiro & Finnan LLC
Goyal Shikha
MStar Semiconductor Inc.
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