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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 RF 2.6-GHz direct-conversion receiver front-end for CMMB (China Mobile Multimedia Broadcasting) tuner system is implemented in SiGe BiCMOS technology. It consists of a low noise amplifier (LNA) with high-gain/low-gain (HG/LG) modes, a continuously tuned radio frequency variable gain amplifier (RFVGA) and a down-conversion mixer. The receiver delivers a power gain of 36 dB, an input-referred-3rd-order-intercept-point...
This paper presents a BiCMOS frequency synthesizer covering frequency range from 500 MHz to 2175 MHz which is fully compatible with DVB-S application. The frequency synthesizer consists of monolithic VCOs, utilizing on-chip symmetric inductor, high speed CML divider built with high performance BJT, and can achieve -80 dBc/Hz, -100 dBc/Hz, -123 dBc/Hz phase noise at 1 KHz, 100 KHz and 1 MHz carrier...
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...
This paper presents a 2.4 GHz power amplifier driver used in a WLAN IEEE 802.11b/g transmitter front-end which employs a walking IF architecture. The power amplifier driver is implemented in a 50 GHz 0.5 mum SiGe BiCMOS technology. And it consists of a differential cascode amplifier stage, an emitter follower and a common-emitter amplifier. It dissipates 28 mA current under a 3.3 V power supply, and...
This paper presents a low-power single chip WLAN 802.11a transceiver RFIC for personal communication terminal applications. The 5.2 GHz transceiver RFIC is implemented in a 0.5 mum SiGe technology with 16 mm2 die size. It consumes 110/130 mA in receive/transmit mode under a 3.3V supply. The receiver path shows a 6.4 dB noise figure and a -20 dBm IIP3 under a maximal 67 dB gain. The transmitter path...
This paper presents a low-power single chip WLAN 802.11a transceiver RFIC for personal communication terminal applications. The 5.2 GHz transceiver RFIC is implemented in a 0.5 mum SiGe technology with 16 mm2 die size. It consumes 110/130 mA in receive/transmit mode under a 3.3V supply. The receiver path shows a 6.4 dB noise figure and a -20dBm IIP3 under a maximal 67 dB gain. The transmitter path...
This paper represents a LC VCO with AAC (auto amplitude control), in which PMOS FETs are used as active components, and the varactors are directly connected to ground to widen Kvco linear range. The AAC circuitry adds little noise to the VCO and provides it with robust performance over a wide temperature and carrier frequency range. The VCO is fabricated in 50-GHz 0.35-mum SiGe BiCMOS process. The...
In this paper, a wide-band low noise amplifier, two mixers and a VCO with its buffers implemented in 50GHz 0.35mum SiGe BiCMOS technology for dual-conversion digital TV tuner front-end is presented. The LNA and up-converting mixer utilizes current injection technology to achieve high linearity. Without using inductors, the LNA achieves 0.1-1GHz wide bandwidth and 18.8-dB gain with less than 1.4-dB...
A DC-offset cancellation scheme in the 5 GHz direct-conversion receiver compliant with IEEE 802.11a wireless LAN standard is described in this paper. It uses the analog feedback loop to eliminate the DC-offset at the output of the double-balanced mixer. The mixer has a simulation voltage conversion gain of 13 dB at 5.2 GHz, noise figure of 9.67 dB, IIP3 of 7.6dBm. The solution provides 39.1 dB reduction...
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