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CMOS UWB Multiplier
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DOI：10.1109/TCSII.2011.2161175.png)
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A fully differential analog multiplier for wideband operations is presented. The circuit consists of a p-MOSFET common-gate differential pair input stage for wideband impedance matching, a p-MOSFET Gilbert quad as a multiplier stage, and active loads. The circuit has been designed and fabricated in 90-nm CMOS. The test-chip area is 560 x 700 mu m(2). The overall power consumption is 3.7 mW from a 1.2-V power supply. In the case of input monocycle pulses with duration time of 700 ps, the measurements show an input-output energy ratio equal to 2, a conversion gain of 12.7 dB at intermediate frequencies in the range of 0.001-10 MHz for input tones in the range of 2-4 GHz, a noise figure of 14.4 dB (minimum) and compression points of -3.5 and -2 dBm for the two inputs. The performance of the proposed multiplier favorably compares with the state of the art.
Keyword:
CMOS
multiplier
radar
radio-frequency (RF) integrated circuit
ultrawideband (UWB)
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