ITC認為HTC侵害Nokia2件專利

Nokia在2012.5.2.大陣仗的在ITC及Delaware地方法院控告HTC、Viewsonic及RIM侵害其專利，ITC於2013.9.23.初判HTC侵害Nokia的US7,415,247及US6,393,260等2件專利。判決見：http://www.usitc.gov/press_room/documents/337_847_ID.pdf

US7,415,247
Title : Method and arrangement for transmitting and receiving RF signals through various radio interfaces of communication systems
Filing Date : 1999.11.25.
Issue Date : 2008.8.19.
Abstract :
A method and an arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common synthesizer by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwidth by means of a controllable low-pass filter operating at baseband frequency.

US6,393,260
Title : Method for attenuating spurious signals and receiver
Filing Date : 1999.4.15.
Issue Date : 2002.5.21.
Abstract :
The invention relates to a method and radio receiver for attenuating spurious signals when receiving (6 to 12) radio signals, when radio signals are mixed (10) to a second frequency, which may be the baseband frequency, for example. Spurious signals are caused by balance errors in the mixer (10) which result from component value fluctuations within tolerance limits. According to the invention, mixing is balanced by setting (12) variable-level bias voltages and/or currents to transistors in the mixer circuit (10). An advantage of the invention is that even-order spurious signals caused by balance errors in the mixing of a signal to a second frequency are considerably attenuated. The invention finds particular utility in a mobile communications device, for example.