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An airflow sensing chip, which integrates MEMS sensors with their CMOS signal processing circuits into a single chip, is proposed for respiration detection. Three micro-cantilever-based airflow sensors were designed and fabricated using a 0.35 m CMOS/MEMS 2P4M mixed-signal polycide process. Two main differences were present among these three designs: they were either metal-covered or metal-free...
A CMOS bandgap reference generator with switched-capacitor and corresponding double sampling techniques is presented. The proposed circuit uses a low-gain amplifier to generate an accurate reference voltage so that this structure can be implemented in low-voltage environment. With proper design, the circuit can produce any output voltage between supply voltage and ground. The circuit was designed...
A low-power transceiver for 802.11n in 65 nm CMOS technology is presented. It supports 2times2 MIMO to satisfy the requirement of the draft 802.11n standard. In receiver chain it shows 5.3 dB low noise figure. In transmit chain an on-chip PA driver delivers 9 dBm output P1dB. -20 to 100degC operation temperature is achieved. A SigmaDelta fractional-N synthesizer is used to support variable reference...
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