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The double conversion architecture for TV reception is presented by emphasizing the most critical block: the upmixer. Simple formulas for NF and IIP3 are derived and the particularities of the upconverter design are highlighted. The circuit is implemented in a 47 GHz SiGe technology. According to measurements the mixer shows 14..16 dBm IIP3 and 10..13 dB NF. The mixer core operates at 5V with 60 mA...
A single-chip frequency synthesizer using a 0.3 micron enhancement-depletion HEMT-process is presented. The circuit is a prototype for the local oscillator source of future low cost millimeter wave systems, such as intelligent cruise control radars (76 GHz) or very high speed wireless LANs (60 GHz). It integrates all the components needed to generate a phase locked signal around 18 GHz, i.e. the VCO,...
A static and a dynamic frequency divider based on enhancement and depletion 0.2 μm gate length AlGaAs/GaAs-HEMT (fT = 60 / 55 GHz) technology were designed and fabricated. High-speed operations up to 31 GHz and 39 GHz for the static and dynamic frequency divider, respectively, have been achieved. The single-ended input and differential output to ground simplify many applications. The power consumption...
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