Abstract: Adaptive image rejection in a wireless communication receiver is implemented using a dual conversion technique where a first mixer is used to downconvert the received RF signal to a first IF. A second mixer is used to downconvert the first IF to a baseband signal. A Local Oscillator (LO) drives the first mixer. The baseband signal is filtered and data is extracted. A bit error rate is determined from the extracted data. If the bit error rate falls below a predetermined threshold, a controller adjusts the frequency of the LO. If the LO was previously configured as a low side LO the controller adjusts the frequency of the LO to a high side LO frequency. Conversely, if the LO is configured as a high side LO the controller adjusts the frequency of the LO to be the low side LO frequency.

Abstract: A semiconductor device comprises an SOI substrate, a trench, a trench capacitor, and a conductive layer. The SOI substrate includes a fist semiconductor region, a buried insulating film formed on the first semiconductor region, and a second semiconductor region formed on the buried insulating film. The trench is of a depth to reach the first semiconductor region, extending from a surface of the second semiconductor region on the SOI substrate and passing through the buried insulating film. The trench capacitor is formed within the trench. The conductive layer is formed in a region between a sidewall portion of the trench and the buried insulating film, and electrically connects the first semiconductor region and the second semiconductor region.