<P>An active resistor-capacitor low-pass filter with simultaneously programmable high-end and low-end cutoff frequencies is presented for IEEE 802.22 cognitive radio transmitter applications. Transfer function analysis shows that the integrator ...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=A107584706
2010
-
SCI,SCIE,SCOPUS
학술저널
85-89(5쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>An active resistor-capacitor low-pass filter with simultaneously programmable high-end and low-end cutoff frequencies is presented for IEEE 802.22 cognitive radio transmitter applications. Transfer function analysis shows that the integrator ...
<P>An active resistor-capacitor low-pass filter with simultaneously programmable high-end and low-end cutoff frequencies is presented for IEEE 802.22 cognitive radio transmitter applications. Transfer function analysis shows that the integrator frequency of a dc offset cancellation block should be tuned inversely proportional to the open-loop gain to maintain the low-end cutoff frequency at a constant value. Realized in a 0.18- ¿m complementary metal-oxide-semiconductor, the low-end cutoff frequency is successfully tuned between 740 Hz and 10 kHz over the 30-dB gain variation. Measured results show that the gain is tuned from -16.3 to +13.9 dB, and the high-end cutoff frequency is tuned from 2.1 to 6.04 MHz, while drawing 4.5 mA from a 1.8-V supply.</P>
A