Diego Cabrera - IEEE Xplore Author Profile

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A wide-band receiver for multi-band multi-standard cellular applications with a positive feed-back translational loop is presented in this paper. This technique allows tunable RF filtering right on the input node of the LNA with the base-band filter selectivity. The architecture is highly reconfigurable both regarding the RF channel center frequency and the channel bandwidth. The 65nm CMOS prototy...Show More
Wide-band filterless RF front-ends are yet unpractical because of the stringent linearity requirements imposed by out-of-band blockers. A base-band to radio-frequency feedback receiver (BB-RF-FBRX) architecture is proposed in this paper, which reflects the base-band selectivity to the RF input. The aim of this architecture is to eliminate surface acoustic wave (SAW) filters between the antenna and...Show More
This paper presents the implementation of an undersampled LC bandpass SigmaDelta ADC with a raised-cosine feedback DAC. It directly converts after the LNA a signal centered in the ISM band at 2.442 GHz with a sampling frequency of 3.256 GHz. This circuit has been fabricated in a 130 nm CMOS process, it occupies an area of 0.27 mm2 and is operating at a supply voltage of 1.3 V. The Signal-to-Noise ...Show More
While CMOS technology has fueled continued progress in digital baseband scalability, analog functions still need considerable design effort. Therefore, a fully integrated scalable radio receiver should exploit simplified analog design, have no restriction to supply voltage scaling and enable co-integration of RF, analog and digital functions. Switching speed is the main MOS device performance that...Show More
A new discrete-time receiver architecture enables to specifically circumvent CMOS integration issues, taking advantage of ZIF architectures yet escaping impact of flicker noise and second-order front-end non-linearity. This architecture, compatible with further scaling, was implemented for a GSM receiver in 90-nm CMOS. This receiver occupies 1-mm2 core area, achieves -108-dBm sensitivity, and -16-...Show More
A DVB-T tuner is integrated in 0.12 /spl mu/m CMOS. The 16mm/sup 2/ chip integrates a double conversion chain including PLL, VCO, voltage regulators, and ADC. The receiver exhibits a 6.5dB NF, a VCO phase noise of -140dBc/Hz at 1MHz offset at 1.21GHz, and a 14b ADC. It is compatible for integration with a digital demodulator IP.Show More
A fully CMOS integrated DVB_T RF analog tuner achieving a 6.5 dB noise figure is presented. The tuner is implemented in a 0.12 mum CMOS process and occupies a 16 mm2 area. The receiver is based on a double zero IF conversion and integrates within the receiver chain the frequency synthesizers and two 4 MHz bandwidth 14 bit analog digital converters. The VCO exhibits a -140 dBc phase noise at 1 MHz ...Show More
This current-mode continuous-time ΣΔ modulator achieves 84dB dynamic range. With a sampling frequency of 26MHz, the modulator consumes 5mW at 1.8V. The peak SNR is 79dB in 100kHz bandwidth. The Total Harmonic Distortion is -79dB for 25kHz input signal. The fully differential third order modulator is implemented in 0.18µm CMOS process with polysilicon n-well capacitors, and occupies 1.56mm2.Show More