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- W2609546384 abstract "A differential variable gain amplifier (VGA) for wideband baseband signals has been designed, analyzed, and implemented in a 0.25- $rm mu m$ InP double heterojunction bipolar transistor technology with $f_{T}/f_{mathrm{ max}}$ of 370/650 GHz. The 3-dB frequency bandwidth is measured to be 40 GHz with a maximum gain of 31 dB, resulting in a gain bandwidth product (GBP) of 1.4 THz, four times higher than previously reported GBP from a Gilbert cell-based VGAs. Furthermore, it measures a gain control range of 44 dB, a noise figure of 6.2 dB, an output third-order intercept point of 17 dBm, and a total power consumption of 350 mW from a single −7-V supply. With pseudorandom binary sequence test pattern signals, a clear open eye at 44 Gb/s was observed. The complete circuit, including on-chip integrated bias network and pads, measures 0.77 $rm mm^{2}$ . We analyze the VGA for the 3-dB bandwidth and GBP by the use of zero-value time constants method to analytically identify the maximum GBP with respect to the design parameters and current bias." @default.
- W2609546384 created "2017-05-05" @default.
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- W2609546384 date "2017-10-01" @default.
- W2609546384 modified "2023-09-24" @default.
- W2609546384 title "Design and Analysis of a Wideband Gilbert Cell VGA in 0.25- $mu {rm m}$ InP DHBT Technology With DC-40-GHz Frequency Response" @default.
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- W2609546384 doi "https://doi.org/10.1109/tmtt.2017.2693146" @default.
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