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We have developed an on-chip RF filter in 130 nm BiCMOS for SAW-less GPS receivers. The filter is implemented as a cascode amplifier stage with reactive resonant tanks. The filter employs two Q-enhanced LC tanks to create a transfer function with steep roll-off characteristic and narrow passband. The image rejection filter achieves a 3 dB bandwidth of less than 12 MHz at the GPS center...
A highly linear wideband power amplifier IC with low memory effect for W-CDMA applications is presented utilizing Si LDMOS process technology. The IC was optimized to reduce typical low frequency gain peak often observed in LDMOS power devices. Topology of the interstage matching contributes to reduction of the electrical memory effect to specification level of maximum 2 dB imbalance over power between...
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