Single chip cmos transmitter/receiver and method of using same
Номер патента: EP1228564A4
Опубликовано: 24-01-2007
Автор(ы): Deog-Kyoon Jeong, Joonbae Park, Kyeongho Lee, Wonchan Kim
Принадлежит: Gct Semiconductor Inc
Опубликовано: 24-01-2007
Автор(ы): Deog-Kyoon Jeong, Joonbae Park, Kyeongho Lee, Wonchan Kim
Принадлежит: Gct Semiconductor Inc
Реферат: The RF communication system includes an antenna that receives/transmits RF signals, a PLL (730) that generates multi-phase clock signals having a frequency different from a carrier frequency and a reference signal having a carrier frequency, a demodulation-mixer (720) that mixes the received RF signals with the multi-phase clock signals having the frequency different from the carrier frequency to output signals having a frequency reduced relative to the carrier frequency, two stage amplification (740, 750) that amplifies a selected channel signal to a required dynamic level, and an A/D converting unit (770 A) for converting the RF signals from the mixing unit into digital signals. The two stage amplification can provide the selected channel signal with sufficient gain, even when an adjacent channel signal is output by the demodulation mixer (720) with greater amplitude or power.
Single chip cmos transmitter/receiver and method of using same
Номер патента: EP1228564A2. Автор: Joonbae Park,Wonchan Kim,Kyeongho 309-901 Sam-Sung-San-Ju-Kong APT LEE,Deog-Kyoon 301-803 School of Elec. Eng. JEONG. Владелец: Gct Semiconductor Inc. Дата публикации: 2002-08-07.