Ivan Siu-Chuang Lu

Learn More
—A quad-band GSM/GPRS/EDGE receiver, implemented in 65 nm CMOS, complies with the ETSI standard without the need of external SAW filters. By exploring the properties of passive mixers and current-mode operation from RF to baseband, the receiver can achieve a SAW-filter-like selectivity with inexpensive on-chip components such as resistors and capacitors. In(More)
This paper presents the power and performance analysis of a digital, direct sequence ultra-wideband (DS-UWB) receiver operating in the 3 to 4 GHz band. The signal to noise and distortion ratio (SNDR) and bit error rate (BER) were evaluated with varying degrees of front-end linearity and analog to digital converter (ADC) accuracy. The analysis and simulation(More)
—This brief presents a robust, power efficient CMOS frequency divider for the 5-GHz UNII band. The divider operates as a voltage controlled ring oscillator with the output frequency modulated by the switching of the input transmission gate. The divider, designed in a 0.25-m SOS-CMOS technology, occupies 35 25 m 2 and exhibit a operating frequency of 5.6 GHz(More)
This paper presents the performance analysis of direct sequence ultrawideband (DS-UWB) systems operating with non-linear receiver front-ends. Following this analysis, we propose the novel use of pulse doublets to mitigate non-linearity induced distortion. The signal to noise and distortion ratio (SNDR) and bit error rate (BER) were evaluated with varying(More)
This paper presents for the first time the circuit parameter analysis of a digital Multiband-UWB transceiver, encompm-ing a novel low-power subhand generator. This subband generator is capable of producing multiple frequency bands, enabling subband generation From 3 to l0GHz with nanosec-ond switching times. The circuit analysis of the complete transceiver(More)
  • 1