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This paper presents experimental results of an analog baseband circuit for China multimedia mobile broadcasting (CMMB) direct conversion receiver in 0.35 um SiGe BiCMOS process. It is the first baseband of CMMB RFIC reported so far. A 8th-order chebyshev low pass filter (LPF) with calibration system is used in the analog baseband circuit, the filter provides 0.5 dB passband ripple and -35 dB attenuation...
In this paper, a low-power, highly linear, integrated, active-RC filter exhibiting a multi-standard (IEEE 802.11a/b/g and DVB-H) application and bandwidth (3 MHz, 4 MHz, 9.5 MHz) is present. The filter exploits digitally-controlled polysilicon resister banks and an accurate automatic tuning scheme to account for process and temperature variations. The automatic frequency calibration scheme provides...
A mobile TV tuner baseband for the newly established China Mobile Multimedia Broadcasting (CMMB) is presented. The baseband VGA achieves more than 40 dB gain tuning with temperature compensation. The baseband filter provides 0.5 dB passband ripple and 35 dB attenuation at 6 MHz with the cutoff frequency at 4 MHz. In addition, the calibration of filter is reported to achieve the bandwidth accuracy...
A multi-mode transceiver baseband RFIC compliant with IEEE 802.11a/b/g and DVB-H is presented. The receiver filter has three corner frequency designed for WLAN and DVB-H respectively and the VGA provides 50 dB gain range with a step of 0.8 dB; the transmitter filter provides 12 MHz bandwidth and the VGA covers 24 dB gain range in 1.6-dB steps. In addition, the calibration of filter is reported to...
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