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A passive CMOS down conversion mixer with LO buffer is presented in 0.25 mum SiGe BiCMOS using a 2.5 V supply. With a 60 MHz RF signal input, measurements show that the conversion loss is 2.9 dB, the input-referred 1 dB compression point is 20 dBm and the input- referred noise is -146.8 dBm/Hz. Compared to conventional NMOS mixers, the 1 dB compression point is improved by 9.7 dB. The tradeoffs and...
This paper describes a digitally controlled on-chip monotonic reference current generator with 8-bit resolution and a LSB (least significant bit) current as low as 100 nA. It was designed as a building block of a generic DC-coupled burst mode laser diode driver (BM-LDD) for GPON (gigabit passive optical network) applications and acts as an on-chip reference current generator with a settling time of...
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